KEYBOARDS · YOUR NEXT FACE-OFF

Logitech G915 X LIGHTSPEED vs Logitech MX Mechanical

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

Compared products

YOUR FIRST CHOICE

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

WHICH SUITS YOU?

Choose the G915 X LIGHTSPEED for

Both wired and wireless connections

Choose the MX Mechanical for

Narrower stated keyboard span across the desk: 433.85 mm vs 475 mm

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

See the 11 verified differences

THE CONTENDER

Logitech MX Mechanical

920-010756 · English UK (QWERTY) · graphite · Tactile Quiet switches

Full product profile Official image

Exact model & source notes

The MX Mechanical is a full-size low-profile mechanical keyboard for multi-device work; this graphite UK-layout SKU uses Tactile Quiet switches and connects by Bluetooth or a Logi Bolt receiver.

Specifications checked 26 Sept 2026.

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

Manufacturer specifications

G915 X LIGHTSPEED UK & US retailers

UK & US price history: no verified listing yet

MX Mechanical 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

Exact switch option

Check the exact configuration and source conditions for your use.

Logitech G915 X LIGHTSPEEDLow-profile GL tactile mechanical switches

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.

Source 1

Logitech MX MechanicalTactile Quiet low-profile mechanical switches

Manufacturer specification · Clicky and Linear versions are separate SKUs.

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.

Exact switch option

In Visual facts

Logitech G915 X LIGHTSPEEDLow-profile GL tactile mechanical switches

Logitech MX MechanicalTactile Quiet low-profile mechanical switches

Sources

Logitech G915 X LIGHTSPEED

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

Logitech MX Mechanical

Manufacturer specification · Clicky and Linear versions are separate SKUs.

Logitech MX Mechanical — UK product page, SKU data and specifications

Check the exact configuration and source conditions for your use.

Connections

In Visual facts

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

Logitech MX MechanicalBluetooth; Logi Bolt

Sources

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

Logitech MX Mechanical

Manufacturer specification · Original exact source inventory: Bluetooth Low Energy or Logi Bolt USB receiver; Easy-Switch between up to 3 devices. Not compatible with Logitech Unifying receivers. The USB-C cable is described as a charging cable. Easy-Switch device count and Flow/setup scope are recorded separately. USB receiver host attachment is distinct from a wired keyboard data mode; unlisted wired data operation remains unverified.

Logitech MX Mechanical — 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

Logitech G915 X LIGHTSPEED475 mm

Logitech MX Mechanical433.85 mm

Sources

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

Logitech MX Mechanical

Manufacturer specification · Logitech labels this Width.

Logitech MX Mechanical — UK product page, SKU data and specifications

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

Configuration software

In Visual facts

Logitech G915 X LIGHTSPEEDLogitech G HUB

Logitech MX MechanicalLogi Options+: Fn key functions, app-specific profiles, backlighting effects and Smart Actions

Sources

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

Logitech MX Mechanical

Manufacturer specification · Logi Options+ runs on Windows and macOS.

Logitech MX Mechanical — UK product page, SKU data and specifications

Physical keys, software assignments and stored profiles are different capabilities. Check the host-software requirements; a larger count does not establish better typing or lower latency.

Backlighting

In Visual facts

Logitech G915 X LIGHTSPEEDLIGHTSYNC RGB

Logitech MX MechanicalBacklit keys with hand-proximity activation and ambient light sensor

Sources

Logitech G915 X LIGHTSPEED

Manufacturer specification

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

Logitech MX Mechanical

Manufacturer specification

Logitech MX Mechanical — UK product page, SKU data and specifications

Lighting zones and per-key control differ. RGB does not by itself establish individual-key colour control; read the software requirements.

Keycap material

In Visual facts

Logitech G915 X LIGHTSPEEDDouble-shot PBT

Logitech MX MechanicalDual-colour keycaps with a matte surface

Sources

Logitech G915 X LIGHTSPEED

Manufacturer specification

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

Logitech MX Mechanical

Manufacturer specification · Logitech does not state the keycap material.

Logitech MX Mechanical — UK product page, SKU data and specifications

Check the exact configuration and source conditions for your use.

Show 5 more verified differences

Battery claim

In Visual facts

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

Logitech MX MechanicalUp to 15 days, or up to 10 months with backlighting off

Sources

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

Logitech MX Mechanical

Manufacturer specification · USB-C rechargeable; battery life may vary based on user and computing conditions.

Logitech MX Mechanical — UK product page, SKU data and specifications

Manufacturer claims for the stated mode and equipment. Read each test condition; this is not measured everyday battery life.

Dimensions

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

Logitech MX MechanicalLogitech lists Height 131.55 mm, Width 433.85 mm and Depth 26.1 mm

Sources

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

Logitech MX Mechanical

Manufacturer specification · The Height and Depth labels appear transposed (131.55 mm front-to-back, 26.1 mm tall); Width 433.85 mm is the span across the keys. Logitech’s labels are preserved unchanged.

Logitech MX Mechanical — UK product page, SKU data and specifications

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

Battery type

Logitech G915 X LIGHTSPEEDRechargeable lithium polymer

Logitech MX MechanicalRechargeable Li-Po (1500 mAh)

Sources

Logitech G915 X LIGHTSPEED

Manufacturer specification

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

Logitech MX Mechanical

Manufacturer specification

Logitech MX Mechanical — UK product page, SKU data and specifications

Manufacturer claims for the stated mode and equipment. Read each test condition; this is not measured everyday battery life.

Original package contents

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

Logitech MX MechanicalKeyboard; Logi Bolt receiver; USB-C charging cable (USB-A to USB-C); user documentation

Sources

Logitech G915 X LIGHTSPEED

Manufacturer specification

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

Logitech MX Mechanical

Manufacturer specification

Logitech MX Mechanical — UK product page, SKU data and specifications

Check the exact configuration and source conditions for your use.

Manufacturer-stated weight

Logitech G915 X LIGHTSPEED1080 g

Logitech MX Mechanical828 g

Sources

Logitech G915 X LIGHTSPEED

Manufacturer specification · Logitech states this weight without the cable.

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

Logitech MX Mechanical

Manufacturer specification · Keyboard only; Logitech lists the receiver separately at 1.68 g.

Logitech MX Mechanical — 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

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

Logitech MX MechanicalBluetooth: Windows 10, 11 or later; macOS 10.15 or later; iOS 14 or later; iPadOS 14 or later; Linux; ChromeOS; Android 8.0 or later. Logi Bolt: USB-A port; Windows 10, 11 or later; macOS (no version stated); Linux; ChromeOS

Sources

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

Logitech MX Mechanical

Manufacturer specification · On systems other than Windows and macOS only basic functions are supported without software. Logi Options+ is optional and available on Windows and macOS.

Logitech MX Mechanical — 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 (21)

Dedicated macro keys

Logitech G915 X LIGHTSPEED9 keys

Logitech MX MechanicalNot verified

Sources

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

Logitech MX Mechanical

No source recorded for this side.

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

Onboard profile capacity

Logitech G915 X LIGHTSPEEDNot verified

Logitech MX MechanicalNot verified

Sources

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

Logitech MX Mechanical

No source recorded for this side.

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

Multi-device pairing

Logitech G915 X LIGHTSPEEDNot verified

Logitech MX MechanicalEasy-Switch across up to 3 devices; compatible with Logitech Flow-enabled mice

Sources

Logitech G915 X LIGHTSPEED

No source recorded for this side.

Logitech MX Mechanical

Manufacturer specification

Logitech MX Mechanical — UK product page, SKU data and specifications

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

Key rollover

Logitech G915 X LIGHTSPEEDNot verified

Logitech MX MechanicalNot verified

Sources

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

Logitech MX Mechanical

Logitech does not list a rollover figure on the MX Mechanical UK page. · Manufacturer specification

Logitech MX Mechanical — 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

Logitech G915 X LIGHTSPEEDNot verified

Logitech MX MechanicalNot verified

Sources

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

Logitech MX Mechanical

Logitech does not state hot-swap support on the MX Mechanical UK page. · Manufacturer specification

Logitech MX Mechanical — UK product page, SKU data and specifications

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

Media controls

Logitech G915 X LIGHTSPEEDDedicated media controls

Logitech MX MechanicalNot verified

Sources

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

Logitech MX Mechanical

No source recorded for this side.

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

Switch actuation distance

Logitech G915 X LIGHTSPEED1.3 mm

Logitech MX MechanicalNot verified

Sources

Logitech G915 X LIGHTSPEED

Manufacturer specification

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

Logitech MX Mechanical

No source recorded for this side.

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

Switch actuation force

Logitech G915 X LIGHTSPEED45 g

Logitech MX MechanicalNot verified

Sources

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

Logitech MX Mechanical

No source recorded for this side.

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

Included cable length

Logitech G915 X LIGHTSPEED1.8 m

Logitech MX MechanicalNot verified

Sources

Logitech G915 X LIGHTSPEED

Manufacturer specification

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

Logitech MX Mechanical

No source recorded for this side.

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

Claimed functions per key

Logitech G915 X LIGHTSPEEDNot verified

Logitech MX MechanicalNot verified

Sources

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

Logitech MX Mechanical

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

Logitech G915 X LIGHTSPEEDYes

Logitech MX MechanicalNot verified

Sources

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

Logitech MX Mechanical

No source recorded for this side.

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

KEYCONTROL support

Logitech G915 X LIGHTSPEEDYes

Logitech MX MechanicalNot verified

Sources

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

Logitech MX Mechanical

No source recorded for this side.

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

Media roller present

Logitech G915 X LIGHTSPEEDYes

Logitech MX MechanicalNot verified

Sources

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

Logitech MX Mechanical

No source recorded for this side.

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

Onboard lighting profiles

Logitech G915 X LIGHTSPEEDNot verified

Logitech MX MechanicalNot verified

Sources

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

Logitech MX Mechanical

No source recorded for this side.

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

Palm rest compatibility

Logitech G915 X LIGHTSPEEDNot verified

Logitech MX MechanicalCompatible with MX Palm Rest (sold separately)

Sources

Logitech G915 X LIGHTSPEED

No source recorded for this side.

Logitech MX Mechanical

Manufacturer specification · The palm rest is not listed in the package contents.

Logitech MX Mechanical — 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

Logitech G915 X LIGHTSPEEDYes

Logitech MX MechanicalNot verified

Sources

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

Logitech MX Mechanical

No source recorded for this side.

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

Top plate

Logitech G915 X LIGHTSPEEDBrushed aluminium alloy top plate

Logitech MX MechanicalNot verified

Sources

Logitech G915 X LIGHTSPEED

Manufacturer specification

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

Logitech MX Mechanical

No source recorded for this side.

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

Switch total travel

Logitech G915 X LIGHTSPEED3.2 mm

Logitech MX MechanicalNot verified

Sources

Logitech G915 X LIGHTSPEED

Manufacturer specification

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

Logitech MX Mechanical

No source recorded for this side.

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

Volume control mechanism

Logitech G915 X LIGHTSPEEDNot verified

Logitech MX MechanicalNot verified

Sources

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

Logitech MX Mechanical

No source recorded for this side.

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

Wired USB keyboard mode

Logitech G915 X LIGHTSPEEDYes

Logitech MX MechanicalNot verified

Sources

Logitech G915 X LIGHTSPEED

Manufacturer specification

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

Logitech MX Mechanical

No source recorded for this side.

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

Wireless range claim

Logitech G915 X LIGHTSPEEDNot verified

Logitech MX Mechanical10 m

Sources

Logitech G915 X LIGHTSPEED

No source recorded for this side.

Logitech MX Mechanical

Manufacturer specification · May vary with operating environment and computer setup.

Logitech MX Mechanical — UK product page, SKU data and specifications

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

2 shared fields have the same recorded value.

WHAT EACH CHOICE ASKS OF YOU

What it brings and what to check

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

Logitech MX Mechanical

What it brings

Easy-Switch moves between up to three devices, and Logitech lists Windows, macOS, iOS, iPadOS, Linux, ChromeOS and Android over Bluetooth.
Manufacturer source
Proximity-activated, light-adjusting backlighting is paired with a claimed 15 days of battery life, or up to 10 months with the backlight off.
Manufacturer source

What to check

At 433.85 mm across and 828 g it needs a full-size footprint, and the USB-C cable is described only as a charging cable, not a wired data mode.
Manufacturer source
Only basic functions are supported outside Windows and macOS without software, and Logitech lists no hot-swap or rollover figure.
Manufacturer source

COMPARE THE DETAILS

Full specifications

How we verify

Differences only

35 of 35 specifications Sources in each row

Source-backed specifications for Logitech G915 X LIGHTSPEED and Logitech MX Mechanical
Specification	Logitech G915 X LIGHTSPEED	Logitech MX Mechanical

Regional layout Sources 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 Logitech MX Mechanical Manufacturer specification · UK SKU 920-010756. The official UK image shows the ISO arrangement (tall Enter, £ on 3) with dual Windows/Mac legends; US-layout SKUs are separate products. Logitech MX Mechanical — UK product page, SKU data and specifications	English UK (QWERTY)	English UK (QWERTY)
Keyboard size Sources 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 Logitech MX Mechanical Manufacturer specification · Logitech describes a low-profile form factor; the full-size arrangement with number pad is read from the official UK image and the 433.85 mm width. Canonical full-size class retains the integrated number pad; switch height, regional key layout and controls remain separate source facts. Logitech MX Mechanical — UK product page, SKU data and specifications	Full-size with number pad	Full-size with number pad
DimensionsDifferent Sources 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 Logitech MX Mechanical Manufacturer specification · The Height and Depth labels appear transposed (131.55 mm front-to-back, 26.1 mm tall); Width 433.85 mm is the span across the keys. Logitech’s labels are preserved unchanged. Logitech MX Mechanical — UK product page, SKU data and specifications	475 × 150 × 22.6 mm (length across the keys × width front-to-back × height)	Logitech lists Height 131.55 mm, Width 433.85 mm and Depth 26.1 mm
Supported operating systemsDifferent Sources 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 Logitech MX Mechanical Manufacturer specification · On systems other than Windows and macOS only basic functions are supported without software. Logi Options+ is optional and available on Windows and macOS. Logitech MX Mechanical — UK product page, SKU data and specifications	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	Bluetooth: Windows 10, 11 or later; macOS 10.15 or later; iOS 14 or later; iPadOS 14 or later; Linux; ChromeOS; Android 8.0 or later. Logi Bolt: USB-A port; Windows 10, 11 or later; macOS (no version stated); Linux; ChromeOS
Keyboard span across the deskDifferent Sources 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 Logitech MX Mechanical Manufacturer specification · Logitech labels this Width. Logitech MX Mechanical — UK product page, SKU data and specifications	475 mm	433.85 mm
Manufacturer-stated weightDifferent Sources Logitech G915 X LIGHTSPEED Manufacturer specification · Logitech states this weight without the cable. Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications Logitech MX Mechanical Manufacturer specification · Keyboard only; Logitech lists the receiver separately at 1.68 g. Logitech MX Mechanical — UK product page, SKU data and specifications	1080 g	828 g
Top plate Sources Logitech G915 X LIGHTSPEED Manufacturer specification Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications Logitech MX Mechanical No source recorded.	Brushed aluminium alloy top plate	Not provided

Exact switch optionDifferent Sources 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 Logitech MX Mechanical Manufacturer specification · Clicky and Linear versions are separate SKUs. Logitech MX Mechanical — UK product page, SKU data and specifications	Low-profile GL tactile mechanical switches	Tactile Quiet low-profile mechanical switches
Switch actuation distance Sources Logitech G915 X LIGHTSPEED Manufacturer specification Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications Logitech MX Mechanical No source recorded.	1.3 mm	Not provided
Switch total travel Sources Logitech G915 X LIGHTSPEED Manufacturer specification Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications Logitech MX Mechanical No source recorded.	3.2 mm	Not provided
Switch actuation force Sources 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 Logitech MX Mechanical No source recorded.	45 g	Not provided
Keycap materialDifferent Sources Logitech G915 X LIGHTSPEED Manufacturer specification Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications Logitech MX Mechanical Manufacturer specification · Logitech does not state the keycap material. Logitech MX Mechanical — UK product page, SKU data and specifications	Double-shot PBT	Dual-colour keycaps with a matte surface

ConnectionsDifferent Sources 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 Logitech MX Mechanical Manufacturer specification · Original exact source inventory: Bluetooth Low Energy or Logi Bolt USB receiver; Easy-Switch between up to 3 devices. Not compatible with Logitech Unifying receivers. The USB-C cable is described as a charging cable. Easy-Switch device count and Flow/setup scope are recorded separately. USB receiver host attachment is distinct from a wired keyboard data mode; unlisted wired data operation remains unverified. Logitech MX Mechanical — UK product page, SKU data and specifications	LIGHTSPEED wireless (USB receiver); Bluetooth; wired USB-C data mode	Bluetooth; Logi Bolt
Included cable length Sources Logitech G915 X LIGHTSPEED Manufacturer specification Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications Logitech MX Mechanical No source recorded.	1.8 m	Not provided
Battery claimDifferent Sources 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 Logitech MX Mechanical Manufacturer specification · USB-C rechargeable; battery life may vary based on user and computing conditions. Logitech MX Mechanical — UK product page, SKU data and specifications	Up to 36 hours at 100% LIGHTSYNC RGB brightness; up to 90 hours at 50%; up to 800 hours with RGB off	Up to 15 days, or up to 10 months with backlighting off
Battery typeDifferent Sources Logitech G915 X LIGHTSPEED Manufacturer specification Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications Logitech MX Mechanical Manufacturer specification Logitech MX Mechanical — UK product page, SKU data and specifications	Rechargeable lithium polymer	Rechargeable Li-Po (1500 mAh)
Wired USB keyboard mode Sources Logitech G915 X LIGHTSPEED Manufacturer specification Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications Logitech MX Mechanical No source recorded.	Yes	Not provided
Wireless range claim Sources Logitech G915 X LIGHTSPEED No source recorded. Logitech MX Mechanical Manufacturer specification · May vary with operating environment and computer setup. Logitech MX Mechanical — UK product page, SKU data and specifications	Not provided	10 m
Multi-device pairing Sources Logitech G915 X LIGHTSPEED No source recorded. Logitech MX Mechanical Manufacturer specification Logitech MX Mechanical — UK product page, SKU data and specifications	Not provided	Easy-Switch across up to 3 devices; compatible with Logitech Flow-enabled mice

BacklightingDifferent Sources Logitech G915 X LIGHTSPEED Manufacturer specification Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications Logitech MX Mechanical Manufacturer specification Logitech MX Mechanical — UK product page, SKU data and specifications	LIGHTSYNC RGB	Backlit keys with hand-proximity activation and ambient light sensor
Media controls Sources 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 Logitech MX Mechanical No source recorded.	Dedicated media controls	Not provided
Dedicated macro keys Sources 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 Logitech MX Mechanical No source recorded.	9 keys	Not provided
Configuration softwareDifferent Sources 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 Logitech MX Mechanical Manufacturer specification · Logi Options+ runs on Windows and macOS. Logitech MX Mechanical — UK product page, SKU data and specifications	Logitech G HUB	Logi Options+: Fn key functions, app-specific profiles, backlighting effects and Smart Actions
Programmable key support Sources 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 Logitech MX Mechanical No source recorded.	Yes	Not provided
KEYCONTROL support Sources 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 Logitech MX Mechanical No source recorded.	Yes	Not provided
Dedicated playback/track controls Sources 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 Logitech MX Mechanical No source recorded.	Yes	Not provided
Media roller present Sources 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 Logitech MX Mechanical No source recorded.	Yes	Not provided

Original package contentsDifferent Sources Logitech G915 X LIGHTSPEED Manufacturer specification Logitech G915 X LIGHTSPEED — UK product page, SKU data and specifications Logitech MX Mechanical Manufacturer specification Logitech MX Mechanical — UK product page, SKU data and specifications	Keyboard; LIGHTSPEED USB receiver; USB extender; USB-C data/charging cable; user documentation	Keyboard; Logi Bolt receiver; USB-C charging cable (USB-A to USB-C); user documentation
Palm rest compatibility Sources Logitech G915 X LIGHTSPEED No source recorded. Logitech MX Mechanical Manufacturer specification · The palm rest is not listed in the package contents. Logitech MX Mechanical — UK product page, SKU data and specifications	Not provided	Compatible with MX Palm Rest (sold separately)

Show unverified (6)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 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 Logitech MX Mechanical No source recorded.	Not provided	Not provided
Hot-swappable switches Sources 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 Logitech MX Mechanical Logitech does not state hot-swap support on the MX Mechanical UK page. · Manufacturer specification Logitech MX Mechanical — UK product page, SKU data and specifications	Not provided	Not provided
Key rollover Sources 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 Logitech MX Mechanical Logitech does not list a rollover figure on the MX Mechanical UK page. · Manufacturer specification Logitech MX Mechanical — UK product page, SKU data and specifications	Not provided	Not provided
Onboard lighting profiles Sources 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 Logitech MX Mechanical No source recorded.	Not listed by the manufacturer	Not provided
Claimed functions per key Sources 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 Logitech MX Mechanical No source recorded.	Not listed by the manufacturer	Not provided
Volume control mechanism Sources 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 Logitech MX Mechanical No source recorded.	Not listed by the manufacturer	Not provided

First product manufacturer source Second product manufacturer source

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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.