LG UltraGear 27GL850-B vs LG UltraGear evo GX9 (39GX950B)

Every spec side by side, from each maker's published figures.

Only show differences

Better figure, where one is clearly better

Share comparison

UltraGear 27GL850-B compared with UltraGear evo GX9 (39GX950B)

	LGUltraGear 27GL850-B	LGUltraGear evo GX9 (39GX950B)
Overview
Released
Released	July 2019	June 2026
Display
Screen size
Screen size	27″	38.9″
Resolution
Resolution	2560 × 1440 (QHD)	5120 × 2160 (5K2K) (better)
Sharpness
Sharpness	109 pixels per inch	143 pixels per inch (better)
Panel
Panel	IPS (Nano IPS)	OLED (4th-gen Primary RGB Tandem WOLED; Dual mode: 2560 x 1080 at 330 Hz)
Refresh rate
Refresh rate	144 Hz	165 Hz (better)
Response time (grey to grey)
Response time (grey to grey)	1 ms	0.03 ms (better)
Brightness (typical)
Brightness (typical)	350 nits (better)	335 nits
HDR peak brightness
HDR peak brightness	–	1,500 nits
HDR certification
HDR certification	–	DisplayHDR True Black 500
HDR formats
HDR formats	HDR10	HDR10
Contrast ratio
Contrast ratio	1,000:1	1,850,000:1
Colour range
Colour range	98% DCI-P3 (CIE 1976)	99.5% DCI-P3
DCI-P3 coverage
DCI-P3 coverage	98%	99.5% (better)
Screen finish
Screen finish	–	Matte
Shape
Shape	Flat	Curved (1500R)
Adaptive sync
Adaptive sync	G-Sync Compatible, FreeSync	G-Sync Compatible, FreeSync Premium Pro
Colour depth
Colour depth	1.07 billion colours; 8-bit plus FRC (TFTCentral)	1.07B colours
sRGB coverage
sRGB coverage	135% sRGB (LG Korea)	–
Colour accuracy
Colour accuracy	Factory colour calibration	–
Colour modes
Colour modes	sRGB and Reader modes; Gamer, FPS and RTS presets (TFTCentral)	–
HDR detail
HDR detail	HDR10 input support; no local dimming (TFTCentral)	–
Response time detail
Response time detail	1ms grey to grey in Faster mode; LG warns this setting can cause visible trails and recommends Fast if they occur	–
Variable refresh range
Variable refresh range	48–144Hz over DisplayPort; 48–100Hz over HDMI with adaptive sync (TFTCentral)	–
Viewing angles
Viewing angles	178° horizontal and vertical, CR ≥ 10	178° horizontal, 178° vertical (CR ≥ 10)
Pixel pitch
Pixel pitch	0.2331 x 0.2331 mm	0.1776 × 0.1776 mm
Eye care
Eye care	Flicker Safe and Reader 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)
Connections
Video inputs
Video inputs	2 × HDMI 2.0, DisplayPort 1.4	2 × HDMI 2.1, DisplayPort 2.1 UHBR20, USB-C
USB-C charging
USB-C charging	None	Up to 90 W (better)
USB ports
USB ports	2 × USB-A	2 × USB-A
KVM switch
KVM switch	–	No
Ethernet
Ethernet	–	No
Speakers
Speakers	No	Yes
USB-C detail
USB-C detail	–	Upstream; display input (DisplayPort Alt Mode), data and up to 90 W charging over one cable
HDMI detail
HDMI detail	2 x HDMI 2.0; 2560 x 1440 at 144Hz with 8-bit colour in LG's specification; adaptive-sync operation has a lower maximum	–
DisplayPort detail
DisplayPort detail	1 x DisplayPort 1.4; 2560 x 1440 at 144Hz with 10-bit colour	–
USB hub detail
USB hub detail	USB 3.0; one upstream and two downstream ports	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	Headphone output	4-pole headphone out (sound + mic)
Speaker detail
Speaker detail	–	2 × 7 W, AI Sound
Design
Stand adjusts
Stand adjusts	Height, tilt, pivot	Height, tilt, swivel
VESA mount
VESA mount	Yes	Yes
Weight with stand
Weight with stand	6.1 kg	10.7 kg
Height adjustment
Height adjustment	110 mm	–
VESA pattern
VESA pattern	100 x 100 mm	100 × 100 mm
Size with stand
Size with stand	614.2 x 274.4 x 464.8–574.8 mm (W x D x H)	921.4 × 605.4 × 322.8 mm (raised), 921.4 × 495.4 × 322.8 mm (lowered)
Size without stand
Size without stand	614.2 x 56.3 x 364.8 mm (W x D x H)	921.4 × 405.0 × 118.7 mm
Weight without stand
Weight without stand	4.2 kg	6.8 kg
Colours
Colours	Black with red trim	Black
Power and support
Power use
Power use	51 W on mode; 65 W maximum; ≤ 0.5 W sleep; ≤ 0.3 W off	Less than 0.5 W (sleep)
Power supply
Power supply	External adapter; 100–240V, 50/60Hz	External adapter, 100–240 V AC, 50/60 Hz
Software
Software	OnScreen Control	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	Adapter, power cable, HDMI cable, DisplayPort cable and USB 3.0 upstream cable	–