A 27-inch 4K IPS monitor with DisplayHDR 400, 5 W × 2 speakers, three HDMI 2.0 inputs and USB-C with 65 W charging on a height-, swivel- and pivot-adjustable stand.
Specifications checked 26 Sept 2026.
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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 SIDE2 topics
SELECTED TOPIC
01 / 02
Manufacturer inputs and connections
Check the exact configuration and source conditions for your use.
LG 27UL550HDMI (YES(2ea)); DisplayPort (YES(1ea)); DP Version (1.4); Headphone out (3-pole (Sound Only))
Manufacturer specification · Literal manufacturer declarations; Yes, No, counts, versions and component/operating qualifiers are preserved. A missing row establishes no capability or absence. Manufacturer section: CONNECTIVITY. Source field: HDMI. Manufacturer section: CONNECTIVITY. Source field: DisplayPort. Manufacturer section: CONNECTIVITY. Source field: DP Version. Manufacturer section: CONNECTIVITY. Source field: Headphone out.
BenQ EW2790U3 × HDMI (v2.0); 1 × USB C(PowerDelivery 65W, DisplayPort Alt Mode, Data); 3 × USB Type-A Downstream (USB 3.2 Gen 1, 5 Gbps, power charging 7.5W); 1 × USB Type-C Downstream (USB 3.2 Gen 1, 5 Gbps, power charging 7.5W); headphone jack
Manufacturer specification · Manufacturer port counts and versions; the source device and cable must support the mode you want.
Match the monitor to the connection. Refresh limits depend on the input, cable and source device. Confirm the exact regional ports, stand adjustment and mount. Manufacturer response-time methods such as MPRT and GtG are different; neither the image nor these figures establish an independent motion or colour-quality test.
LG 27UL550HDMI (YES(2ea)); DisplayPort (YES(1ea)); DP Version (1.4); Headphone out (3-pole (Sound Only))
BenQ EW2790U3 × HDMI (v2.0); 1 × USB C(PowerDelivery 65W, DisplayPort Alt Mode, Data); 3 × USB Type-A Downstream (USB 3.2 Gen 1, 5 Gbps, power charging 7.5W); 1 × USB Type-C Downstream (USB 3.2 Gen 1, 5 Gbps, power charging 7.5W); headphone jack
Sources
LG 27UL550
Manufacturer specification · Literal manufacturer declarations; Yes, No, counts, versions and component/operating qualifiers are preserved. A missing row establishes no capability or absence. Manufacturer section: CONNECTIVITY. Source field: HDMI. Manufacturer section: CONNECTIVITY. Source field: DisplayPort. Manufacturer section: CONNECTIVITY. Source field: DP Version. Manufacturer section: CONNECTIVITY. Source field: Headphone out.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
Manufacturer screen diagonal
LG 27UL550Not verified
BenQ EW2790U27 in
Sources
LG 27UL550
The captured manufacturer specification table does not list an unambiguous manufacturer screen diagonal. No value is inferred. · Manufacturer specification
Manufacturer specification · 65 W from the USB-C port that also carries DisplayPort Alt Mode video and data. Downstream accessory ports supply less and are not laptop-charging ports.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
USB-C connection
LG 27UL550Not verified
BenQ EW2790UYes
Sources
LG 27UL550
No source recorded for this side.
BenQ EW2790U
Manufacturer specification · The listed connections include USB-C or Thunderbolt. Video, data, upstream/downstream roles and charging power depend on the particular port.
Manufacturer specification · BenQ’s table lists “Brightness Intelligence Plus Gen2 (B.I.+ Gen2): Yes” and the product page names B.I.+ Gen2 as an eye-care function; the same page says its Visual Optimizer dynamically adjusts screen brightness and colour temperature based on ambient lighting.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
Maximum power
LG 27UL550Not verified
BenQ EW2790U180 W
Sources
LG 27UL550
No source recorded for this side.
BenQ EW2790U
Manufacturer specification · Manufacturer power figure under the stated operating mode; real use, brightness, connected USB devices and charging load can differ.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
Specification market
LG 27UL550Not verified
BenQ EW2790UUK
Sources
LG 27UL550
No source recorded for this side.
BenQ EW2790U
Manufacturer specification · BenQ UK specification table. BenQ’s US page for the same model was checked separately on 26 September 2026 (see research notes); plugs, bundled accessories and warranty can still differ by market.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
Sleep-mode power
LG 27UL550Not verified
BenQ EW2790U0.5 W
Sources
LG 27UL550
No source recorded for this side.
BenQ EW2790U
Manufacturer specification · Manufacturer power figure under the stated operating mode; real use, brightness, connected USB devices and charging load can differ.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
Manufacturer dimensions and configuration basis
LG 27UL550Not verified
BenQ EW2790U427.4-536.9 × 614.2 × 211.2 mm (height × width × depth, with stand)
Sources
LG 27UL550
The manufacturer does not supply complete, unambiguous unit-labelled dimensions for the relevant product/components. Original declarations: none. Missing units or malformed component values are not guessed. · Manufacturer specification · The manufacturer does not supply complete, unambiguous unit-labelled dimensions for the relevant product/components. Original declarations: none. Missing units or malformed component values are not guessed.
BenQ lists 427.4-536.9x614.2x211.2 mm (height × width × depth). · Manufacturer specification · Manufacturer dimensions with the supplied stand; a height range shows the stand’s lowest and highest positions. Allow extra room for cables and movement.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
Weight with stand
LG 27UL550Not verified
BenQ EW2790U7.7 kg
Sources
LG 27UL550
No source recorded for this side.
BenQ EW2790U
Manufacturer specification · BenQ lists “Net Weight” separately from “Net Weight (w/o Base)”, so this figure includes the supplied base; packaging excluded.
Manufacturer claims do not establish independently measured performance, current retailer stock or price. Unlisted specifications remain explicitly unknown.
Source-backed specifications for LG 27UL550 and BenQ EW2790U
Specification
LG 27UL550
BenQ EW2790U
Manufacturer screen diagonalSources
LG 27UL550
The captured manufacturer specification table does not list an unambiguous manufacturer screen diagonal. No value is inferred. · Manufacturer specification
HDMI (YES(2ea)); DisplayPort (YES(1ea)); DP Version (1.4); Headphone out (3-pole (Sound Only))
3 × HDMI (v2.0); 1 × USB C(PowerDelivery 65W, DisplayPort Alt Mode, Data); 3 × USB Type-A Downstream (USB 3.2 Gen 1, 5 Gbps, power charging 7.5W); 1 × USB Type-C Downstream (USB 3.2 Gen 1, 5 Gbps, power charging 7.5W); headphone jack
Manufacturer specification · The listed connections include USB-C or Thunderbolt. Video, data, upstream/downstream roles and charging power depend on the particular port.
Manufacturer specification · 65 W from the USB-C port that also carries DisplayPort Alt Mode video and data. Downstream accessory ports supply less and are not laptop-charging ports.
Manufacturer dimensions and configuration basisSources
LG 27UL550
The manufacturer does not supply complete, unambiguous unit-labelled dimensions for the relevant product/components. Original declarations: none. Missing units or malformed component values are not guessed. · Manufacturer specification · The manufacturer does not supply complete, unambiguous unit-labelled dimensions for the relevant product/components. Original declarations: none. Missing units or malformed component values are not guessed.
BenQ lists 427.4-536.9x614.2x211.2 mm (height × width × depth). · Manufacturer specification · Manufacturer dimensions with the supplied stand; a height range shows the stand’s lowest and highest positions. Allow extra room for cables and movement.
387.8 × 614.2 × 67.7 mm (height × width × depth, without base)
Weight with standSources
LG 27UL550
No source recorded.
BenQ EW2790U
Manufacturer specification · BenQ lists “Net Weight” separately from “Net Weight (w/o Base)”, so this figure includes the supplied base; packaging excluded.
Manufacturer specification · Manufacturer power figure under the stated operating mode; real use, brightness, connected USB devices and charging load can differ.
Manufacturer specification · Manufacturer power figure under the stated operating mode; real use, brightness, connected USB devices and charging load can differ.
Manufacturer specification · BenQ’s table lists “Brightness Intelligence Plus Gen2 (B.I.+ Gen2): Yes” and the product page names B.I.+ Gen2 as an eye-care function; the same page says its Visual Optimizer dynamically adjusts screen brightness and colour temperature based on ambient lighting.
Manufacturer specification · BenQ UK specification table. BenQ’s US page for the same model was checked separately on 26 September 2026 (see research notes); plugs, bundled accessories and warranty can still differ by market.
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.