LG UltraGear 27GR83Q-B vs LG UltraGear evo GX9 (39GX950B)

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UltraGear 27GR83Q-B compared with UltraGear evo GX9 (39GX950B)

	LGUltraGear 27GR83Q-B	LGUltraGear evo GX9 (39GX950B)
Overview
Released
Released	2023	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	OLED (4th-gen Primary RGB Tandem WOLED; Dual mode: 2560 x 1080 at 330 Hz)
Refresh rate
Refresh rate	240 Hz (better)	165 Hz
Response time (grey to grey)
Response time (grey to grey)	1 ms	0.03 ms (better)
Brightness (typical)
Brightness (typical)	400 nits (better)	335 nits
HDR peak brightness
HDR peak brightness	–	1,500 nits
HDR certification
HDR certification	DisplayHDR 400	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	95% DCI-P3 (CIE 1976)	99.5% DCI-P3
DCI-P3 coverage
DCI-P3 coverage	95%	99.5% (better)
Screen finish
Screen finish	–	Matte
Shape
Shape	Flat	Curved (1500R)
Adaptive sync
Adaptive sync	G-Sync Compatible, FreeSync Premium	G-Sync Compatible, FreeSync Premium Pro
Colour depth
Colour depth	1.07 billion colours	1.07B colours
Colour modes
Colour modes	Reader Mode and colour weakness mode	–
Response time detail
Response time detail	1ms grey to grey in Faster mode	–
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 calibration and hardware calibration support	Factory calibrated; hardware calibration ready (LG Calibration Studio)
Connections
Video inputs
Video inputs	2 × HDMI 2.1, 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 2.1; 2560 x 1440 at 240Hz	–
DisplayPort detail
DisplayPort detail	1 x DisplayPort 1.4; 2560 x 1440 at 240Hz	–
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	No picture in picture or picture by picture	PBP (2 inputs), PIP
Audio out
Audio out	Four-pole headphone and microphone jack with DTS Headphone:X	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	6.2 kg	10.7 kg
Height adjustment
Height adjustment	110 mm	–
Tilt
Tilt	-5° to +15°	–
Pivot
Pivot	90° clockwise	–
VESA pattern
VESA pattern	100 x 100 mm	100 × 100 mm
Size with stand
Size with stand	613.5 x 253.7 x 467.7–577.7 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	613.5 x 51.3 x 371.6 mm (W x D x H)	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	≤ 0.5 W sleep; ≤ 0.3 W off; LG Korea lists 31.8 W on mode, while LG Greece lists 50 W typical	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	LG Calibration Studio and OnScreen Control (LG Korea)	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, DisplayPort cable, HDMI cable and USB A to B cable	–