LG UltraGear OLED GX7 (27GX790B) vs LG UltraGear evo GX9 (39GX950B)

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UltraGear OLED GX7 (27GX790B) compared with UltraGear evo GX9 (39GX950B)

	LGUltraGear OLED GX7 (27GX790B)	LGUltraGear evo GX9 (39GX950B)
Overview
Released
Released	March 2026	June 2026
Display
Screen size
Screen size	26.5″	38.9″
Resolution
Resolution	2560 × 1440 (QHD)	5120 × 2160 (5K2K) (better)
Sharpness
Sharpness	111 pixels per inch	143 pixels per inch (better)
Panel
Panel	OLED (4th Gen Primary RGB Tandem OLED; Dual mode: 720p at 720 Hz)	OLED (4th-gen Primary RGB Tandem WOLED; Dual mode: 2560 x 1080 at 330 Hz)
Refresh rate
Refresh rate	540 Hz (better)	165 Hz
Response time (grey to grey)
Response time (grey to grey)	0.02 ms (better)	0.03 ms
Brightness (typical)
Brightness (typical)	335 nits	335 nits
HDR peak brightness
HDR peak brightness	1,500 nits	1,500 nits
HDR certification
HDR certification	DisplayHDR True Black 500	DisplayHDR True Black 500
HDR formats
HDR formats	–	HDR10
Contrast ratio
Contrast ratio	–	1,850,000:1
Colour range
Colour range	99.5% DCI-P3	99.5% DCI-P3
DCI-P3 coverage
DCI-P3 coverage	99.5%	99.5%
Screen finish
Screen finish	Matte	Matte
Shape
Shape	Flat	Curved (1500R)
Adaptive sync
Adaptive sync	–	G-Sync Compatible, FreeSync Premium Pro
Colour depth
Colour depth	1.07B colours	1.07B colours
Viewing angles
Viewing angles	178° horizontal, 178° vertical (CR ≥ 10)	178° horizontal, 178° vertical (CR ≥ 10)
Pixel pitch
Pixel pitch	0.2292 × 0.2292 mm	0.1776 × 0.1776 mm
Eye care
Eye care	Reader Mode, Color Weakness mode	Reader Mode, Color Weakness mode; panel UL-verified Flicker-Free and Discomfort Glare Free, Eyesafe 3.0
Burn-in protection
Burn-in protection	–	OLED Care, including an OLED Care screen saver
Calibration
Calibration	Factory calibrated; hardware calibration ready (LG Calibration Studio)	Factory calibrated; hardware calibration ready (LG Calibration Studio)
Connections
Video inputs
Video inputs	2 × HDMI 2.1, DisplayPort 2.1, USB-C	2 × HDMI 2.1, DisplayPort 2.1 UHBR20, USB-C
USB-C charging
USB-C charging	Up to 5 W	Up to 90 W (better)
USB ports
USB ports	2 × USB-A	2 × USB-A
KVM switch
KVM switch	–	No
Ethernet
Ethernet	No	No
Speakers
Speakers	–	Yes
USB-C detail
USB-C detail	–	Upstream; display input (DisplayPort Alt Mode), data and up to 90 W charging over one cable
USB hub detail
USB hub detail	2 × USB 3.0 downstream, upstream via USB-C	2 × USB-A (USB 3.2 Gen 2), upstream via USB-C
Picture by picture
Picture by picture	–	PBP (2 inputs), PIP
Audio out
Audio out	4-pole headphone out (sound + mic)	4-pole headphone out (sound + mic)
Speaker detail
Speaker detail	–	2 × 7 W, AI Sound
Design
Stand adjusts
Stand adjusts	Height, tilt, swivel, pivot (better)	Height, tilt, swivel
VESA mount
VESA mount	Yes	Yes
Weight with stand
Weight with stand	6.8 kg	10.7 kg
VESA pattern
VESA pattern	100 × 100 mm	100 × 100 mm
Size with stand
Size with stand	605.2 × 527.6 × 220 mm (raised), 605.2 × 397.6 × 220 mm (lowered)	921.4 × 605.4 × 322.8 mm (raised), 921.4 × 495.4 × 322.8 mm (lowered)
Size without stand
Size without stand	605.2 × 351.0 × 51.2 mm	921.4 × 405.0 × 118.7 mm
Weight without stand
Weight without stand	4.3 kg	6.8 kg
Colours
Colours	–	Black
Power and support
Power use
Power use	Less than 0.5 W (sleep), less than 0.3 W (DC off)	Less than 0.5 W (sleep)
Power supply
Power supply	External adapter, 100–240 V AC, 50/60 Hz	External adapter, 100–240 V AC, 50/60 Hz
Software
Software	LG Calibration Studio (True Color Pro), Dual Controller	LG Calibration Studio (True Color Pro), Dual Controller
Certifications
Certifications	–	UL-verified Perfect Black, Perfect Colour and Perfect Reproduction
In the box
In the box	HDMI 2.1 and DisplayPort 2.1 cables	–