KEYBOARDS · YOUR NEXT FACE-OFF

Das Keyboard 4 Professional vs Logitech G915 X LIGHTSPEED

Real specs. Clear sources.Exact models · UK & US buying links

Compared products

YOUR FIRST CHOICE

Das Keyboard 4 Professional

DASK4MKPROCLI · Clicky Cherry MX2A Blue · US English ANSI (104 keys) · for PC

Full product profile Official image

Exact model & source notes

The Das Keyboard 4 Professional is a wired full-size typing keyboard with Cherry MX2A switches, an anodised aluminium top panel, dedicated media controls with a large volume knob and a two-port USB 3.0 hub. This record is the US ANSI PC model DASK4MKPROCLI with clicky Cherry MX2A Blue switches.

Specifications checked 26 Sept 2026.

Amazon links open search results. Check the exact variant, current price and availability with the retailer.

Manufacturer specifications

WHICH SUITS YOU?

Choose the Das Keyboard 4 Professional for

An US English ANSI (104 keys) layout

Choose the Logitech G915 X LIGHTSPEED for

An English UK (QWERTY) layout
Both wired and wireless connections

Built from verified specifications that differ. Not a rating or a recommendation.

See the 11 verified differences

THE CONTENDER

Logitech G915 X LIGHTSPEED

920-012675 · English UK (QWERTY) · black · GL Tactile low-profile switches

Full product profile Official image

Exact model & source notes

The G915 X LIGHTSPEED is Logitech’s full-size low-profile wireless gaming keyboard; this UK-layout SKU uses GL Tactile switches and adds nine G keys, a number pad and LIGHTSPEED, Bluetooth and wired connections.

Specifications checked 26 Sept 2026.

Amazon links open search results. Check the exact variant, current price and availability with the retailer.

Manufacturer specifications

Das Keyboard 4 Professional UK & US retailers

UK & US price history: no verified listing yet

Logitech G915 X LIGHTSPEED UK & US retailers

UK & US price history: no verified listing yet

Search links open retailer results, not a matched listing; eBay listings are checked daily. As an Amazon Associate I earn from qualifying purchases. As an eBay Partner, we may be compensated if you make a purchase.

THE DIFFERENCES, MADE VISIBLE

Visual facts

Differences first. Select a topic for its graphic, sources and conditions.

How to read this comparison

Manufacturer facts for the exact models shown. Not a quality rating or a test result.
“Different” means the known values differ, not that one is better.
Missing or conflicting evidence is marked and never counts as a difference. Source chips hold each fact’s sources and conditions.

SPECIFICATIONS SIDE BY SIDE7 topics

SELECTED TOPIC

01 / 07

Regional layout

Check the exact configuration and source conditions for your use.

Das Keyboard 4 ProfessionalUS English ANSI (104 keys)

Manufacturer specification · Das Keyboard lists a 104-key US layout and 105-key UK, NO and DE layouts. The official image shows the ANSI wide Enter with backslash above and @ on 2.

Source 1

Logitech G915 X LIGHTSPEEDEnglish UK (QWERTY)

Manufacturer specification · UK SKU 920-012675. The official UK image shows the ISO arrangement (tall Enter, £ on 3); US-layout SKUs are separate products.

Source 1

Explore the full specifications

Match the layout, switches and connection. Check the exact regional key layout and switch option. A similar model name can describe different switches or a wireless version. Software support, key remapping and console compatibility need their own evidence; dimensions and switch travel are not a typing or gaming score.

WHAT CHANGES BETWEEN THEM?

Key differences

Full specifications ↓

11 verified differences, most decision-relevant first. 7 are also drawn in Visual facts above. Missing information stays separate.

Regional layout

In Visual facts

Das Keyboard 4 ProfessionalUS English ANSI (104 keys)

Logitech G915 X LIGHTSPEEDEnglish UK (QWERTY)

Sources

Das Keyboard 4 Professional

Manufacturer specification · Das Keyboard lists a 104-key US layout and 105-key UK, NO and DE layouts. The official image shows the ANSI wide Enter with backslash above and @ on 2.

Das Keyboard 4 Professional — product page with technical specifications

Logitech G915 X LIGHTSPEED

Manufacturer specification · UK SKU 920-012675. The official UK image shows the ISO arrangement (tall Enter, £ on 3); US-layout SKUs are separate products.

Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications

Check the exact configuration and source conditions for your use.

Keyboard size

In Visual facts

Das Keyboard 4 ProfessionalFull size with number pad and dedicated media controls

Logitech G915 X LIGHTSPEEDFull-size with number pad

Sources

Das Keyboard 4 Professional

Manufacturer specification · 104-key full layout per Das Keyboard; media keys, sleep button and a large volume knob sit above the number pad.

Das Keyboard 4 Professional — product page with technical specifications

Logitech G915 X LIGHTSPEED

Manufacturer specification · The exact original also has nine dedicated physical G-keys, retained separately in Dedicated G-keys. Macro layers, media controls and top-plate finish remain source-specific facts and do not change the full-size layout class.

Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications

Check the exact configuration and source conditions for your use.

Exact switch option

In Visual facts

Das Keyboard 4 ProfessionalCherry MX2A Blue (clicky), gold contacts

Logitech G915 X LIGHTSPEEDLow-profile GL tactile mechanical switches

Sources

Das Keyboard 4 Professional

Manufacturer specification · SKU DASK4MKPROCLI is the 'Clicky - Cherry MX2A Blue' option; the product page also refers to it generically as Cherry MX Blue. Das Keyboard rates its switches up to 50 million keystrokes. Das Keyboard does not state whether the switches are hot-swappable, so no hot-swap claim is made.

Das Keyboard 4 Professional — official Das Keyboard shop page (switch options and SKUs)Das Keyboard 4 Professional — product page with technical specifications Das Keyboard shop product data for the 4 Professional (variant SKUs and barcodes)

Logitech G915 X LIGHTSPEED

Manufacturer specification · This SKU is the Tactile option; the UK Clicky option is SKU 920-012708. The manufacturer labels the selected style “Tactile”; canonical casing matches the same GL tactile switch option on the wired G915 X.

Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications

Check the exact configuration and source conditions for your use.

Connections

In Visual facts

Das Keyboard 4 ProfessionalWired USB (6.5 ft cable, single USB Type-A connector); two-port USB 3.0 hub

Logitech G915 X LIGHTSPEEDLIGHTSPEED wireless (USB receiver); Bluetooth; wired USB-C data mode

Sources

Das Keyboard 4 Professional

Manufacturer specification · Requires one USB 1.1, 2.0 or 3.0 port; no driver required. No wireless mode.

Das Keyboard 4 Professional — product page with technical specifications

Logitech G915 X LIGHTSPEED

Manufacturer specification · Logitech explicitly supports wired keyboard operation through the included USB-C data/charging cable. LIGHTSPEED, Bluetooth and wired operation are all supported; a shorter inventory cannot give a wired-only contender an unsupported wired-connection advantage.

Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications

Check the exact configuration and source conditions for your use.

Keyboard span across the desk

In Visual facts

Das Keyboard 4 Professional457.2 mm

Logitech G915 X LIGHTSPEED475 mm

Sources

Das Keyboard 4 Professional

Manufacturer specification · Das Keyboard publishes 'Dimensions: 18 x 6.8 x .80 inches' without axis labels; the first figure is read as the width across the keys, as in the dimensions field. Converted at 25.4 mm per inch.

Das Keyboard 4 Professional — product page with technical specifications

Logitech G915 X LIGHTSPEED

Manufacturer specification · Width across the key rows (Logitech labels this Length).

Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications

A size or weight trade-off; it does not establish the better product.

Keycap legends

In Visual facts

Das Keyboard 4 ProfessionalLaser-etched key inscriptions; standard Cherry MX stem

Logitech G915 X LIGHTSPEEDDouble-shot PBT

Sources

Das Keyboard 4 Professional

Manufacturer specification

Das Keyboard 4 Professional — product page with technical specifications

Logitech G915 X LIGHTSPEED

Manufacturer specification

Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications

Check the exact configuration and source conditions for your use.

Show 5 more verified differences

Media controls

In Visual facts

Das Keyboard 4 ProfessionalDedicated media keys, oversized volume knob and instant sleep button

Logitech G915 X LIGHTSPEEDDedicated media controls

Sources

Das Keyboard 4 Professional

Manufacturer specification

Das Keyboard 4 Professional — product page with technical specifications

Logitech G915 X LIGHTSPEED

Manufacturer specification · Logitech names the media keys, and the material inventory explicitly identifies a metal roller (low-carbon aluminium). The official UK image shows previous, play/pause, next and mute beside the roller. Metal construction is not established for the compared PRO X TKL; the shared control inventory does not claim equal roller material. Original published inventory: Media controls and roller. This common field records dedicated media-control availability only. Exact visible button labels, roller/buttons, lighting/Game Mode/profile controls and application dependence retain their own conditions; an omitted playback function or roller material is not a peer absence.

Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications

Check the exact configuration and source conditions for your use.

Dimensions

Das Keyboard 4 Professional18 × 6.8 × 0.80 in (across keys × front-to-back × height)

Logitech G915 X LIGHTSPEED475 × 150 × 22.6 mm (length across the keys × width front-to-back × height)

Sources

Das Keyboard 4 Professional

Manufacturer specification · As published by Das Keyboard in inches without axis labels, read as width × depth × height; elevated height with the footbar is 1.2 in. No metric figures are published; the weight (2.9 lb) and span across the desk are recorded separately with their conversions.

Das Keyboard 4 Professional — product page with technical specifications

Logitech G915 X LIGHTSPEED

Manufacturer specification · Logitech labels these Length 475 mm, Width 150 mm and Height 22.6 mm; its feature copy rounds the height to 23 mm.

Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications

A size or weight trade-off; it does not establish the better product.

Cable length

Das Keyboard 4 Professional1.98 m

Logitech G915 X LIGHTSPEED1.8 m

Sources

Das Keyboard 4 Professional

Manufacturer specification · Das Keyboard states an 'Extra long 6.5 ft USB cable with single USB type-A connector'; converted at 0.3048 m per ft (1.9812 m) and rounded to 1.98 m. The shop page describes an 'Extra-long braided cable'.

Das Keyboard 4 Professional — official Das Keyboard shop page (switch options and SKUs)Das Keyboard 4 Professional — product page with technical specifications

Logitech G915 X LIGHTSPEED

Manufacturer specification

Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications

Check the exact configuration and source conditions for your use.

Top-case material

Das Keyboard 4 ProfessionalBlack anodised aluminium top panel

Logitech G915 X LIGHTSPEEDBrushed aluminium alloy top plate

Sources

Das Keyboard 4 Professional

Manufacturer specification · Top panel only; Das Keyboard does not state the material of the bottom enclosure.

Das Keyboard 4 Professional — official Das Keyboard shop page (switch options and SKUs)Das Keyboard 4 Professional — product page with technical specifications

Logitech G915 X LIGHTSPEED

Manufacturer specification

Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications

Check the exact configuration and source conditions for your use.

Manufacturer-stated weight

Das Keyboard 4 Professional1315 g

Logitech G915 X LIGHTSPEED1080 g

Sources

Das Keyboard 4 Professional

Manufacturer specification · Das Keyboard states 'Weight: 2.9 lbs'; converted at 453.59237 g per lb (1315.4 g) and rounded to the nearest gram, although the published figure has only two significant figures. Das Keyboard does not say whether the cable is included.

Das Keyboard 4 Professional — product page with technical specifications

Logitech G915 X LIGHTSPEED

Manufacturer specification · Logitech states this weight without the cable.

Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications

A size or weight trade-off; it does not establish the better product.

Configuration & compatibility details (1)

Supported operating systems

Das Keyboard 4 ProfessionalWindows and Linux PCs

Logitech G915 X LIGHTSPEEDLIGHTSPEED: USB port; Windows 10 v.1809 or later; macOS X 10.11 or later. Bluetooth: Bluetooth-enabled devices; Windows 11 or later; macOS 11 or later; ChromeOS; Android 4.3 or later; iOS 10 or later

Sources

Das Keyboard 4 Professional

Manufacturer specification · Das Keyboard's system requirements for this PC model; a separate '4 Professional for Mac' model exists.

Das Keyboard 4 Professional — product page with technical specifications

Logitech G915 X LIGHTSPEED

Manufacturer specification · Internet access for Logitech G HUB is listed as optional.

Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications

These descriptions or measurements differ. Wording alone does not establish a different capability; check the exact configuration.

Missing or non-comparable evidence (23)

Configuration software

Das Keyboard 4 ProfessionalNot verified

Logitech G915 X LIGHTSPEEDLogitech G HUB

Sources

Das Keyboard 4 Professional

No source recorded for this side.

Logitech G915 X LIGHTSPEED

Manufacturer specification · Uses Logitech G HUB. Original published inventory: KEYCONTROL per-key customisation, macros and remapping. This common application name does not equate source-specific KEYCONTROL layers, per-key maxima, selected-key programming, rapid trigger, analog actions or Game Mode behaviour. Those exact positives and unresolved counterpart scopes remain separately represented.

Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Dedicated macro keys

Das Keyboard 4 ProfessionalNot verified

Logitech G915 X LIGHTSPEED9 keys

Sources

Das Keyboard 4 Professional

No source recorded for this side.

Logitech G915 X LIGHTSPEED

Manufacturer specification · Nine dedicated G keys; KEYCONTROL can also remap other keys.

Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Onboard profile capacity

Das Keyboard 4 ProfessionalNot verified

Logitech G915 X LIGHTSPEEDNot verified

Sources

Das Keyboard 4 Professional

No source recorded for this side.

Logitech G915 X LIGHTSPEED

Logitech does not list a stored-profile count on the G915 X LIGHTSPEED UK page. · Manufacturer specification

Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

USB pass-through

Das Keyboard 4 ProfessionalTwo-port USB 3.0 SuperSpeed hub (up to 5 Gb/s)

Logitech G915 X LIGHTSPEEDNot verified

Sources

Das Keyboard 4 Professional

Manufacturer specification · Das Keyboard's product information lists a 'Two-port USB 3.0 SuperSpeed hub - Up to 5Gb/s'; the shop's key features list a 'Two-port USB 3.0 hub for quick peripheral access'. The keyboard itself connects with a single USB Type-A connector.

Das Keyboard 4 Professional — official Das Keyboard shop page (switch options and SKUs)Das Keyboard 4 Professional — product page with technical specifications

Logitech G915 X LIGHTSPEED

No source recorded for this side.

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Key rollover

Das Keyboard 4 ProfessionalFull NKRO over USB (toggled with Shift + Mute)

Logitech G915 X LIGHTSPEEDNot verified

Sources

Das Keyboard 4 Professional

Manufacturer specification

Das Keyboard 4 Professional — product page with technical specifications

Logitech G915 X LIGHTSPEED

Logitech does not list a rollover figure on the G915 X LIGHTSPEED UK page. · Manufacturer specification

Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Hot-swappable switches

Das Keyboard 4 ProfessionalNot verified

Logitech G915 X LIGHTSPEEDNot verified

Sources

Das Keyboard 4 Professional

No source recorded for this side.

Logitech G915 X LIGHTSPEED

Logitech does not state hot-swap support on the G915 X LIGHTSPEED UK page. · Manufacturer specification

Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Backlighting

Das Keyboard 4 ProfessionalNot verified

Logitech G915 X LIGHTSPEEDLIGHTSYNC RGB

Sources

Das Keyboard 4 Professional

Das Keyboard's specification list for the 4 Professional does not mention key backlighting either way, so no value is recorded. · Manufacturer specification

Das Keyboard 4 Professional — product page with technical specifications

Logitech G915 X LIGHTSPEED

Manufacturer specification

Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Height adjustment

Das Keyboard 4 ProfessionalMagnetic footbar raises the keyboard (elevated height 1.2 in); the footbar doubles as a ruler with a magnifying lens

Logitech G915 X LIGHTSPEEDNot verified

Sources

Das Keyboard 4 Professional

Manufacturer specification · Das Keyboard publishes the elevated height in inches only; it does not publish a tilt angle.

Das Keyboard 4 Professional — official Das Keyboard shop page (switch options and SKUs)Das Keyboard 4 Professional — product page with technical specifications

Logitech G915 X LIGHTSPEED

No source recorded for this side.

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Battery claim

Das Keyboard 4 ProfessionalNot verified

Logitech G915 X LIGHTSPEEDUp to 36 hours at 100% LIGHTSYNC RGB brightness; up to 90 hours at 50%; up to 800 hours with RGB off

Sources

Das Keyboard 4 Professional

No source recorded for this side.

Logitech G915 X LIGHTSPEED

Manufacturer specification · Continuous-use claims. RGB must be disabled with the keyboard brightness button for the maximum figure; Logitech notes G HUB then reports no more than 236 hours.

Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Switch actuation distance

Das Keyboard 4 ProfessionalNot verified

Logitech G915 X LIGHTSPEED1.3 mm

Sources

Das Keyboard 4 Professional

No source recorded for this side.

Logitech G915 X LIGHTSPEED

Manufacturer specification

Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Switch actuation force

Das Keyboard 4 ProfessionalNot verified

Logitech G915 X LIGHTSPEED45 g

Sources

Das Keyboard 4 Professional

No source recorded for this side.

Logitech G915 X LIGHTSPEED

Manufacturer specification · Tactile option; Logitech lists 43 g for linear and 48 g for clicky.

Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Battery type

Das Keyboard 4 ProfessionalNot verified

Logitech G915 X LIGHTSPEEDRechargeable lithium polymer

Sources

Das Keyboard 4 Professional

No source recorded for this side.

Logitech G915 X LIGHTSPEED

Manufacturer specification

Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Claimed functions per key

Das Keyboard 4 ProfessionalNot verified

Logitech G915 X LIGHTSPEEDNot verified

Sources

Das Keyboard 4 Professional

No source recorded for this side.

Logitech G915 X LIGHTSPEED

No exact per-key function maximum is established by the retained current interpretation. Dedicated G-key counts, multiple layers and two analog stages do not supply a 15-function maximum; the positive programming subset remains known. · Manufacturer specification

Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Original package contents

Das Keyboard 4 ProfessionalNot verified

Logitech G915 X LIGHTSPEEDKeyboard; LIGHTSPEED USB receiver; USB extender; USB-C data/charging cable; user documentation

Sources

Das Keyboard 4 Professional

No source recorded for this side.

Logitech G915 X LIGHTSPEED

Manufacturer specification

Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Rated switch durability

Das Keyboard 4 ProfessionalUp to 50 million keystrokes

Logitech G915 X LIGHTSPEEDNot verified

Sources

Das Keyboard 4 Professional

Manufacturer specification

Das Keyboard 4 Professional — product page with technical specifications

Logitech G915 X LIGHTSPEED

No source recorded for this side.

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Programmable key support

Das Keyboard 4 ProfessionalNot verified

Logitech G915 X LIGHTSPEEDYes

Sources

Das Keyboard 4 Professional

No source recorded for this side.

Logitech G915 X LIGHTSPEED

Manufacturer specification · The exact source positively establishes programmable keys or assignments. This does not establish every key, a dedicated physical G-key count, a maximum function count or platform-independent operation. KEYCONTROL per-key customisation, macros and remapping. Uses Logitech G HUB.

Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

KEYCONTROL support

Das Keyboard 4 ProfessionalNot verified

Logitech G915 X LIGHTSPEEDYes

Sources

Das Keyboard 4 Professional

No source recorded for this side.

Logitech G915 X LIGHTSPEED

Manufacturer specification · The exact own-model source explicitly names KEYCONTROL. Its count and layered/analog scopes remain model-specific.

Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Media roller present

Das Keyboard 4 ProfessionalNot verified

Logitech G915 X LIGHTSPEEDYes

Sources

Das Keyboard 4 Professional

No source recorded for this side.

Logitech G915 X LIGHTSPEED

Manufacturer specification · The own-model source/original positively shows a roller. Function, material and programmability remain independently conditioned; no absent peer roller is inferred.

Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Onboard lighting profiles

Das Keyboard 4 ProfessionalNot verified

Logitech G915 X LIGHTSPEEDNot verified

Sources

Das Keyboard 4 Professional

No source recorded for this side.

Logitech G915 X LIGHTSPEED

The retained exact-model lighting description does not establish onboard lighting-profile storage. · Manufacturer specification

Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Dedicated playback/track controls

Das Keyboard 4 ProfessionalNot verified

Logitech G915 X LIGHTSPEEDYes

Sources

Das Keyboard 4 Professional

No source recorded for this side.

Logitech G915 X LIGHTSPEED

Manufacturer specification · The exact source/original establishes dedicated playback and track controls. G710+, G213 and Alloy Core originals additionally show a stop-labelled key; this does not establish an unlisted peer absence. Media controls and roller

Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Switch total travel

Das Keyboard 4 ProfessionalNot verified

Logitech G915 X LIGHTSPEED3.2 mm

Sources

Das Keyboard 4 Professional

No source recorded for this side.

Logitech G915 X LIGHTSPEED

Manufacturer specification

Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Volume control mechanism

Das Keyboard 4 ProfessionalNot verified

Logitech G915 X LIGHTSPEEDNot verified

Sources

Das Keyboard 4 Professional

No source recorded for this side.

Logitech G915 X LIGHTSPEED

A roller is positively listed/visible, but the exact retained source does not independently name its volume function. Preserve that roller positive and leave the precise volume-function mechanism unresolved. Media controls and roller · Manufacturer specification

Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Wired USB keyboard mode

Das Keyboard 4 ProfessionalNot verified

Logitech G915 X LIGHTSPEEDYes

Sources

Das Keyboard 4 Professional

No source recorded for this side.

Logitech G915 X LIGHTSPEED

Manufacturer specification

Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

0 shared fields have the same recorded value.

WHAT EACH CHOICE ASKS OF YOU

What it brings and what to check

Das Keyboard 4 Professional

What it brings

Dedicated media keys, an oversized volume knob and a sleep button are built in, and the two-port USB 3.0 hub adds pass-through ports at the desk.
Manufacturer source
It supports full n-key rollover over USB and needs no driver; keycaps use the standard Cherry MX stem, so replacement sets fit.
Manufacturer source

What to check

Das Keyboard describes the Blue switch as the most clicky in its line, which may not suit shared offices; the Soft Tactile Brown SKU is its quieter alternative.
Manufacturer source Manufacturer source
It is wired only (6.5 ft USB cable), and no key backlighting is listed in its specifications; Das Keyboard's system requirements name Windows and Linux PCs, with Mac users directed to a separate model.
Manufacturer source

Logitech G915 X LIGHTSPEED

What it brings

It keeps a full number pad and nine dedicated G keys for macros, with KEYCONTROL remapping handled in G HUB.
Manufacturer source
LIGHTSPEED, Bluetooth and a wired USB-C mode are all supported, and Logitech publishes battery claims at 100%, 50% and zero RGB brightness.
Manufacturer source

What to check

At 475 mm long and 1,080 g without the cable it needs far more desk width than the tenkeyless versions.
Manufacturer source
The full-brightness battery claim is 36 hours, and Logitech lists no hot-swap, rollover or onboard-profile figures for this model.
Manufacturer source

COMPARE THE DETAILS

Full specifications

How we verify

Differences only

35 of 35 specifications Sources in each row

Source-backed specifications for Das Keyboard 4 Professional and Logitech G915 X LIGHTSPEED
Specification	Das Keyboard 4 Professional	Logitech G915 X LIGHTSPEED

Regional layoutDifferent Sources Das Keyboard 4 Professional Manufacturer specification · Das Keyboard lists a 104-key US layout and 105-key UK, NO and DE layouts. The official image shows the ANSI wide Enter with backslash above and @ on 2. Das Keyboard 4 Professional — product page with technical specifications Logitech G915 X LIGHTSPEED Manufacturer specification · UK SKU 920-012675. The official UK image shows the ISO arrangement (tall Enter, £ on 3); US-layout SKUs are separate products. Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications	US English ANSI (104 keys)	English UK (QWERTY)
Keyboard sizeDifferent Sources Das Keyboard 4 Professional Manufacturer specification · 104-key full layout per Das Keyboard; media keys, sleep button and a large volume knob sit above the number pad. Das Keyboard 4 Professional — product page with technical specifications Logitech G915 X LIGHTSPEED Manufacturer specification · The exact original also has nine dedicated physical G-keys, retained separately in Dedicated G-keys. Macro layers, media controls and top-plate finish remain source-specific facts and do not change the full-size layout class. Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications	Full size with number pad and dedicated media controls	Full-size with number pad
DimensionsDifferent Sources Das Keyboard 4 Professional Manufacturer specification · As published by Das Keyboard in inches without axis labels, read as width × depth × height; elevated height with the footbar is 1.2 in. No metric figures are published; the weight (2.9 lb) and span across the desk are recorded separately with their conversions. Das Keyboard 4 Professional — product page with technical specifications Logitech G915 X LIGHTSPEED Manufacturer specification · Logitech labels these Length 475 mm, Width 150 mm and Height 22.6 mm; its feature copy rounds the height to 23 mm. Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications	18 × 6.8 × 0.80 in (across keys × front-to-back × height)	475 × 150 × 22.6 mm (length across the keys × width front-to-back × height)
Keyboard span across the deskDifferent Sources Das Keyboard 4 Professional Manufacturer specification · Das Keyboard publishes 'Dimensions: 18 x 6.8 x .80 inches' without axis labels; the first figure is read as the width across the keys, as in the dimensions field. Converted at 25.4 mm per inch. Das Keyboard 4 Professional — product page with technical specifications Logitech G915 X LIGHTSPEED Manufacturer specification · Width across the key rows (Logitech labels this Length). Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications	457.2 mm	475 mm
Manufacturer-stated weightDifferent Sources Das Keyboard 4 Professional Manufacturer specification · Das Keyboard states 'Weight: 2.9 lbs'; converted at 453.59237 g per lb (1315.4 g) and rounded to the nearest gram, although the published figure has only two significant figures. Das Keyboard does not say whether the cable is included. Das Keyboard 4 Professional — product page with technical specifications Logitech G915 X LIGHTSPEED Manufacturer specification · Logitech states this weight without the cable. Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications	1315 g	1080 g
Supported operating systemsDifferent Sources Das Keyboard 4 Professional Manufacturer specification · Das Keyboard's system requirements for this PC model; a separate '4 Professional for Mac' model exists. Das Keyboard 4 Professional — product page with technical specifications Logitech G915 X LIGHTSPEED Manufacturer specification · Internet access for Logitech G HUB is listed as optional. Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications	Windows and Linux PCs	LIGHTSPEED: USB port; Windows 10 v.1809 or later; macOS X 10.11 or later. Bluetooth: Bluetooth-enabled devices; Windows 11 or later; macOS 11 or later; ChromeOS; Android 4.3 or later; iOS 10 or later
Top-case materialDifferent Sources Das Keyboard 4 Professional Manufacturer specification · Top panel only; Das Keyboard does not state the material of the bottom enclosure. Das Keyboard 4 Professional — official Das Keyboard shop page (switch options and SKUs)Das Keyboard 4 Professional — product page with technical specifications Logitech G915 X LIGHTSPEED Manufacturer specification Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications	Black anodised aluminium top panel	Brushed aluminium alloy top plate
Height adjustment Sources Das Keyboard 4 Professional Manufacturer specification · Das Keyboard publishes the elevated height in inches only; it does not publish a tilt angle. Das Keyboard 4 Professional — official Das Keyboard shop page (switch options and SKUs)Das Keyboard 4 Professional — product page with technical specifications Logitech G915 X LIGHTSPEED No source recorded.	Magnetic footbar raises the keyboard (elevated height 1.2 in); the footbar doubles as a ruler with a magnifying lens	Not provided

Exact switch optionDifferent Sources Das Keyboard 4 Professional Manufacturer specification · SKU DASK4MKPROCLI is the 'Clicky - Cherry MX2A Blue' option; the product page also refers to it generically as Cherry MX Blue. Das Keyboard rates its switches up to 50 million keystrokes. Das Keyboard does not state whether the switches are hot-swappable, so no hot-swap claim is made. Das Keyboard 4 Professional — official Das Keyboard shop page (switch options and SKUs)Das Keyboard 4 Professional — product page with technical specifications Das Keyboard shop product data for the 4 Professional (variant SKUs and barcodes) Logitech G915 X LIGHTSPEED Manufacturer specification · This SKU is the Tactile option; the UK Clicky option is SKU 920-012708. The manufacturer labels the selected style “Tactile”; canonical casing matches the same GL tactile switch option on the wired G915 X. Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications	Cherry MX2A Blue (clicky), gold contacts	Low-profile GL tactile mechanical switches
Key rollover Sources Das Keyboard 4 Professional Manufacturer specification Das Keyboard 4 Professional — product page with technical specifications Logitech G915 X LIGHTSPEED Logitech does not list a rollover figure on the G915 X LIGHTSPEED UK page. · Manufacturer specification Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications	Full NKRO over USB (toggled with Shift + Mute)	Not provided
Keycap legendsDifferent Sources Das Keyboard 4 Professional Manufacturer specification Das Keyboard 4 Professional — product page with technical specifications Logitech G915 X LIGHTSPEED Manufacturer specification Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications	Laser-etched key inscriptions; standard Cherry MX stem	Double-shot PBT
Rated switch durability Sources Das Keyboard 4 Professional Manufacturer specification Das Keyboard 4 Professional — product page with technical specifications Logitech G915 X LIGHTSPEED No source recorded.	Up to 50 million keystrokes	Not provided
Switch actuation distance Sources Das Keyboard 4 Professional No source recorded. Logitech G915 X LIGHTSPEED Manufacturer specification Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications	Not provided	1.3 mm
Switch total travel Sources Das Keyboard 4 Professional No source recorded. Logitech G915 X LIGHTSPEED Manufacturer specification Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications	Not provided	3.2 mm
Switch actuation force Sources Das Keyboard 4 Professional No source recorded. Logitech G915 X LIGHTSPEED Manufacturer specification · Tactile option; Logitech lists 43 g for linear and 48 g for clicky. Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications	Not provided	45 g

ConnectionsDifferent Sources Das Keyboard 4 Professional Manufacturer specification · Requires one USB 1.1, 2.0 or 3.0 port; no driver required. No wireless mode. Das Keyboard 4 Professional — product page with technical specifications Logitech G915 X LIGHTSPEED Manufacturer specification · Logitech explicitly supports wired keyboard operation through the included USB-C data/charging cable. LIGHTSPEED, Bluetooth and wired operation are all supported; a shorter inventory cannot give a wired-only contender an unsupported wired-connection advantage. Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications	Wired USB (6.5 ft cable, single USB Type-A connector); two-port USB 3.0 hub	LIGHTSPEED wireless (USB receiver); Bluetooth; wired USB-C data mode
Cable lengthDifferent Sources Das Keyboard 4 Professional Manufacturer specification · Das Keyboard states an 'Extra long 6.5 ft USB cable with single USB type-A connector'; converted at 0.3048 m per ft (1.9812 m) and rounded to 1.98 m. The shop page describes an 'Extra-long braided cable'. Das Keyboard 4 Professional — official Das Keyboard shop page (switch options and SKUs)Das Keyboard 4 Professional — product page with technical specifications Logitech G915 X LIGHTSPEED Manufacturer specification Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications	1.98 m	1.8 m
USB pass-through Sources Das Keyboard 4 Professional Manufacturer specification · Das Keyboard's product information lists a 'Two-port USB 3.0 SuperSpeed hub - Up to 5Gb/s'; the shop's key features list a 'Two-port USB 3.0 hub for quick peripheral access'. The keyboard itself connects with a single USB Type-A connector. Das Keyboard 4 Professional — official Das Keyboard shop page (switch options and SKUs)Das Keyboard 4 Professional — product page with technical specifications Logitech G915 X LIGHTSPEED No source recorded.	Two-port USB 3.0 SuperSpeed hub (up to 5 Gb/s)	Not provided
Battery claim Sources Das Keyboard 4 Professional No source recorded. Logitech G915 X LIGHTSPEED Manufacturer specification · Continuous-use claims. RGB must be disabled with the keyboard brightness button for the maximum figure; Logitech notes G HUB then reports no more than 236 hours. Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications	Not provided	Up to 36 hours at 100% LIGHTSYNC RGB brightness; up to 90 hours at 50%; up to 800 hours with RGB off
Battery type Sources Das Keyboard 4 Professional No source recorded. Logitech G915 X LIGHTSPEED Manufacturer specification Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications	Not provided	Rechargeable lithium polymer
Wired USB keyboard mode Sources Das Keyboard 4 Professional No source recorded. Logitech G915 X LIGHTSPEED Manufacturer specification Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications	Not provided	Yes

Backlighting Sources Das Keyboard 4 Professional Das Keyboard's specification list for the 4 Professional does not mention key backlighting either way, so no value is recorded. · Manufacturer specification Das Keyboard 4 Professional — product page with technical specifications Logitech G915 X LIGHTSPEED Manufacturer specification Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications	Not listed by the manufacturer	LIGHTSYNC RGB
Media controlsDifferent Sources Das Keyboard 4 Professional Manufacturer specification Das Keyboard 4 Professional — product page with technical specifications Logitech G915 X LIGHTSPEED Manufacturer specification · Logitech names the media keys, and the material inventory explicitly identifies a metal roller (low-carbon aluminium). The official UK image shows previous, play/pause, next and mute beside the roller. Metal construction is not established for the compared PRO X TKL; the shared control inventory does not claim equal roller material. Original published inventory: Media controls and roller. This common field records dedicated media-control availability only. Exact visible button labels, roller/buttons, lighting/Game Mode/profile controls and application dependence retain their own conditions; an omitted playback function or roller material is not a peer absence. Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications	Dedicated media keys, oversized volume knob and instant sleep button	Dedicated media controls
Dedicated macro keys Sources Das Keyboard 4 Professional No source recorded. Logitech G915 X LIGHTSPEED Manufacturer specification · Nine dedicated G keys; KEYCONTROL can also remap other keys. Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications	Not provided	9 keys
Configuration software Sources Das Keyboard 4 Professional No source recorded. Logitech G915 X LIGHTSPEED Manufacturer specification · Uses Logitech G HUB. Original published inventory: KEYCONTROL per-key customisation, macros and remapping. This common application name does not equate source-specific KEYCONTROL layers, per-key maxima, selected-key programming, rapid trigger, analog actions or Game Mode behaviour. Those exact positives and unresolved counterpart scopes remain separately represented. Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications	Not provided	Logitech G HUB
Programmable key support Sources Das Keyboard 4 Professional No source recorded. Logitech G915 X LIGHTSPEED Manufacturer specification · The exact source positively establishes programmable keys or assignments. This does not establish every key, a dedicated physical G-key count, a maximum function count or platform-independent operation. KEYCONTROL per-key customisation, macros and remapping. Uses Logitech G HUB. Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications	Not provided	Yes
KEYCONTROL support Sources Das Keyboard 4 Professional No source recorded. Logitech G915 X LIGHTSPEED Manufacturer specification · The exact own-model source explicitly names KEYCONTROL. Its count and layered/analog scopes remain model-specific. Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications	Not provided	Yes
Dedicated playback/track controls Sources Das Keyboard 4 Professional No source recorded. Logitech G915 X LIGHTSPEED Manufacturer specification · The exact source/original establishes dedicated playback and track controls. G710+, G213 and Alloy Core originals additionally show a stop-labelled key; this does not establish an unlisted peer absence. Media controls and roller Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications	Not provided	Yes
Media roller present Sources Das Keyboard 4 Professional No source recorded. Logitech G915 X LIGHTSPEED Manufacturer specification · The own-model source/original positively shows a roller. Function, material and programmability remain independently conditioned; no absent peer roller is inferred. Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications	Not provided	Yes

Original package contents Sources Das Keyboard 4 Professional No source recorded. Logitech G915 X LIGHTSPEED Manufacturer specification Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications	Not provided	Keyboard; LIGHTSPEED USB receiver; USB extender; USB-C data/charging cable; user documentation

Show unverified (5)Not verified, not provided or conflicting for both products. Kept for completeness; never counted as a difference.

Specifications without verified values for either product
Onboard profile capacity Sources Das Keyboard 4 Professional No source recorded. Logitech G915 X LIGHTSPEED Logitech does not list a stored-profile count on the G915 X LIGHTSPEED UK page. · Manufacturer specification Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications	Not provided	Not provided
Hot-swappable switches Sources Das Keyboard 4 Professional No source recorded. Logitech G915 X LIGHTSPEED Logitech does not state hot-swap support on the G915 X LIGHTSPEED UK page. · Manufacturer specification Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications	Not provided	Not provided
Onboard lighting profiles Sources Das Keyboard 4 Professional No source recorded. Logitech G915 X LIGHTSPEED The retained exact-model lighting description does not establish onboard lighting-profile storage. · Manufacturer specification Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications	Not provided	Not listed by the manufacturer
Claimed functions per key Sources Das Keyboard 4 Professional No source recorded. Logitech G915 X LIGHTSPEED No exact per-key function maximum is established by the retained current interpretation. Dedicated G-key counts, multiple layers and two analog stages do not supply a 15-function maximum; the positive programming subset remains known. · Manufacturer specification Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications	Not provided	Not listed by the manufacturer
Volume control mechanism Sources Das Keyboard 4 Professional No source recorded. Logitech G915 X LIGHTSPEED A roller is positively listed/visible, but the exact retained source does not independently name its volume function. Preserve that roller positive and leave the precise volume-function mechanism unresolved. Media controls and roller · Manufacturer specification Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications	Not provided	Not listed by the manufacturer

First product manufacturer source Second product manufacturer source

FIND YOUR CONTENDERS

More products

Closest keyboards to this pair by shared key specifications. Not a popularity ranking.

See all 334 keyboards

Logitech G915 X

Keyboard width: 475 mm
Cable length: 1.8 m
Actuation distance: 1.3 mm

Prices & product profile

Logitech G915 X LIGHTSPEED TKL

Keyboard width: 368 mm
Cable length: 1.8 m
Actuation distance: 1.3 mm

Prices & product profile

Logitech G515 LIGHTSPEED TKL

Keyboard width: 368 mm
Cable length: 1.8 m
Actuation distance: 1.3 mm

Prices & product profile

HyperX Alloy Core RGB

Keyboard width: 443.2 mm
Actuation distance: 2 mm
Regional layout: English UK (QWERTY)

Prices & product profile

Each record represents an explicitly checked model and configuration. Original import: 5 Sept 2026; this is not its verification date. This is not a list of current offers or a popularity ranking.