LG UltraGear 27GR83Q-B vs LG UltraGear OLED 45GX950A

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UltraGear 27GR83Q-B compared with UltraGear OLED 45GX950A

	LGUltraGear 27GR83Q-B	LGUltraGear OLED 45GX950A
Overview
Released
Released	2023	April 2025
Display
Screen size
Screen size	27″	44.5″
Resolution
Resolution	2560 × 1440 (QHD)	5120 × 2160 (5K2K) (better)
Sharpness
Sharpness	109 pixels per inch	125 pixels per inch (better)
Panel
Panel	IPS	OLED (LG Display WOLED with RGWB subpixels; dual mode 2560 × 1080 at 330 Hz (TFTCentral, from LG))
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)	275 nits
HDR certification
HDR certification	DisplayHDR 400	DisplayHDR True Black 400
HDR formats
HDR formats	HDR10	HDR10
Contrast ratio
Contrast ratio	1,000:1	1,500,000:1
Colour range
Colour range	95% DCI-P3 (CIE 1976)	98.5% DCI-P3 (typical)
DCI-P3 coverage
DCI-P3 coverage	95%	98.5% (better)
Shape
Shape	Flat	Curved (800R)
Adaptive sync
Adaptive sync	G-Sync Compatible, FreeSync Premium	FreeSync Premium Pro, G-Sync Compatible
Subpixel layout
Subpixel layout	–	RGWB (TFTCentral)
Colour depth
Colour depth	1.07 billion colours	10-bit, 1.07 billion colours
Colour modes
Colour modes	Reader Mode and colour weakness mode	Reader Mode, Colour Weakness mode; HDR Effect
HDR detail
HDR detail	–	HDR10; VESA DisplayHDR True Black 400
Response time detail
Response time detail	1ms grey to grey in Faster mode	–
Viewing angles
Viewing angles	178° horizontal and vertical, CR ≥ 10	178° / 178°
Pixel pitch
Pixel pitch	0.2331 x 0.2331 mm	0.2035 × 0.2035 mm
Eye care
Eye care	Flicker Safe and Reader Mode	–
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, USB-C
USB-C charging
USB-C charging	None	Up to 90 W (better)
USB ports
USB ports	2 × USB-A	2 × USB-A
Speakers
Speakers	No	Yes
HDMI detail
HDMI detail	2 x HDMI 2.1; 2560 x 1440 at 240Hz	2 × HDMI 2.1 (1.8 m cable included)
DisplayPort detail
DisplayPort detail	1 x DisplayPort 1.4; 2560 x 1440 at 240Hz	DisplayPort 2.1 with DSC (cable included)
USB-C detail
USB-C detail	–	USB-C with video up to 5120 × 2160 at 165 Hz, data and 90 W power delivery; also the USB upstream port
USB hub detail
USB hub detail	USB 3.0; one upstream and two downstream ports	2 × USB 3.0 downstream
Picture by picture
Picture by picture	No picture in picture or picture by picture	PIP; 2-way PBP
Audio out
Audio out	Four-pole headphone and microphone jack with DTS Headphone:X	4-pole headphone out (sound and mic), DTS Headphone:X
Speaker detail
Speaker detail	–	2 × 10 W, Rich Bass
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	14 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)	991.6 × 342 × 545.6–665.6 mm (W × D × H)
Size without stand
Size without stand	613.5 x 51.3 x 371.6 mm (W x D x H)	991.6 × 225.5 × 460.7 mm (W × D × H)
Weight without stand
Weight without stand	4.3 kg	9.4 kg
Controls
Controls	–	4-way joystick; user-defined key; auto input switch; dual controller; Unity Hexagon Lighting
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, less than 0.3 W off
Power supply
Power supply	External adapter; 100–240V, 50/60Hz	External adapter, 20 V / 18 A output, 100–240 V input
Software
Software	LG Calibration Studio and OnScreen Control (LG Korea)	–
In the box
In the box	Adapter, power cable, DisplayPort cable, HDMI cable and USB A to B cable	HDMI 2.1 cable, DisplayPort 2.1 cable, USB-C cable, power adapter and cord, mouse holder