MPG 321URX QD-OLED

Released February 2024

MSI's 31.5-inch 4K 240Hz QD-OLED gaming monitor with a fanless heatsink design and USB-C charging at 90W, for gamers who want a large, sharp OLED.

Size: 31.5″
Resolution: 3840 × 2160
PPI: 140
Panel: QD-OLED
Refresh: 240 Hz
Brightness: 250 nits
HDR: True Black 400
USB-C power: 90 W

What reviewers say

Reviewers agree it matches pricier 4K QD-OLED rivals for less, praising its stunning, accurate picture, deep blacks, fast 240Hz gaming and features such as the KVM switch and burn-in protection. RTINGS found blacks turn slightly purple in bright light, PC Gamer found HDR brightness limiting not adjustable, and Club386 criticised the cheap plastic stand.

From pcgamer.com, club386.com and rtings.com

Specifications

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Display

Screen size: 31.5″
Resolution: 3840 × 2160 (4K)
Sharpness: 140 pixels per inch
Panel: QD-OLED
Refresh rate: 240 Hz
Response time (grey to grey): 0.03 ms
Brightness (typical): 250 nits
HDR certification: DisplayHDR True Black 400
Contrast ratio: 1,500,000:1
Colour range: 99% DCI-P3, 138% sRGB, 97% Adobe RGB
DCI-P3 coverage: 99%
Shape: Flat
Adaptive sync: G-Sync Compatible
Colour depth: 10-bit (1.07 billion colours)
sRGB coverage: 138%
Adobe RGB coverage: 97%
HDR detail: VESA DisplayHDR True Black 400
Variable refresh range: 48–240 Hz (G-Sync Compatible)
Viewing angles: 178° horizontal, 178° vertical
Pixel pitch: 0.1814 x 0.1814 mm
Burn-in protection: OLED Care 2.0; graphene film and custom heatsink (fanless)

Connections

Video inputs: 2 × HDMI 2.1, DisplayPort 1.4a, USB-C
USB-C charging: Up to 90 W
USB ports: 2 × USB-A
Ethernet: No
HDMI detail: 2 x HDMI 2.1, 3840 x 2160 at up to 240 Hz
DisplayPort detail: 1 x DisplayPort 1.4a, 3840 x 2160 at up to 240 Hz
USB-C detail: 1 x USB-C with DisplayPort Alt Mode (3840 x 2160 at up to 240 Hz) and 90 W Power Delivery
USB hub detail: 2 x USB 2.0 Type-A, 1 x USB 2.0 Type-B upstream
Picture by picture: Not supported
Audio out: Headphone out

Design

Stand adjusts: Height, tilt, swivel
VESA mount: Yes
Weight with stand: 9.6 kg
Height adjustment: 0–110 mm
Tilt: -5° to 15°
Swivel: -30° to 30°
Pivot: -10° to 10°
VESA pattern: 100 x 100 mm
Size with stand: 718 x 242 x 483 mm (W x D x H)
Size without stand: 718 x 69 x 418 mm (W x D x H)
Weight without stand: 6.7 kg
Controls: 5-way joystick

Power and support

Power supply: Internal (power cable), 100–240 V, 50/60 Hz
Warranty: 3 years, including panel burn-in

Pros and cons

Pros

4K at 240Hz with 0.03ms GtG response, over DisplayPort, HDMI 2.1 or USB-C
USB-C with DisplayPort Alt Mode and 90W charging
Three-year warranty that covers burn-in

Cons

USB ports are USB 2.0 only
250-nit typical SDR brightness
Stand doesn't turn to portrait, and there's no PiP or PbP

Closest rivals

Model	Size	Resolution	PPI	Panel	Refresh	Brightness	HDR	USB-C power	Released
AOCAGON PRO AG326UZD2	31.5″	3840 × 2160	140	QD-OLED	240 Hz	300 nits	True Black 500	65 W	Apr 2026
ASUSROG Swift OLED PG32UCDM	31.5″	3840 × 2160	140	QD-OLED	240 Hz	250 nits	True Black 400	90 W	Feb 2024
BenQMOBIUZ EX321UZ	31.5″	3840 × 2160	140	QD-OLED	240 Hz	300 nits	True Black 500	90 W	Feb 2026

Sources

Photo: storage-asset.msi.com

MSI MPG 321URX QD-OLED — Front angled view: MSI exact-model UK store product gallery
MSI MPG 321URX QD-OLED — Rear angled view: MSI exact-model UK store product gallery

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