MSI MPG 321URX QD-OLED
9S6-3DD29A-001
31.5"
Size
3840x2160
Resolution
240 Hz
Refresh
QD-OLED
Panel
MSI MPG 321URX QD-OLED
Part number9S6-3DD29A-001
The same part under other regional numbers: MPG321URXQDOLED
The short answer
A 31.5-inch QD-OLED panel at 3840x2160 and 240 Hz, the MSI MPG 321URX QD-OLED suits a mini PC owner who wants a big, sharp, fast desk display and has an output that can drive it. It takes video over HDMI 2.1, DisplayPort 1.4a or USB-C.
The monitor's 90 W power delivery will not run the mini PC.
Specifications
The 31.5-inch screen is a QD-OLED panel running 3840x2160 at 240 Hz. Inputs are two HDMI 2.1, one DisplayPort 1.4a and one USB-C with DP Alt Mode. That USB-C port also offers 90 W of power delivery, so one cable can carry picture and power. The panel has VESA DisplayHDR True Black 400 certification, and it has a VESA mount.
- Screen size
- 31.5"
- Resolution
- 3840x2160
- Refresh rate
- 240 Hz
- Panel
- QD-OLED
- Video inputs
- DisplayPort 1.4a x1, HDMI 2.1 x2, USB-C (DP Alt Mode, PD 90W) x1
- DisplayPort version
- 1.4a
- HDMI version
- 2.1
- USB-C video input
- Yes
- USB-C power delivery
- 90 W
- Thunderbolt input
- Not stated by MSI
- Built-in KVM switch
- Not stated by MSI
- Daisy chain out
- Not stated by MSI
- HDR
- Not stated by MSI
- HDR certification
- VESA DisplayHDR True Black 400
- VESA mount
- Yes
- Speakers
- Not stated by MSI
MSI specification page · read 21 October 2026
Which mini PCs it fits
The monitor needs a matching video output on the mini PC, and 3840x2160 at 240 Hz needs that output to carry it. The GMKtec NucBox K6, HP Z2 Mini G1a, Lenovo ThinkCentre neo 50q Gen 5 and MINISFORUM MS-02 Ultra fit. The Lenovo ThinkCentre M90q Gen 5, MINISFORUM AI X1 Pro and ACEMAGIC V1 fit with a caveat: 240 Hz at this resolution is not confirmed on their outputs. We have not confirmed it fits the MSI MAX Edge AI+ or the NIMO Mini PC Desktop AI Max+ 395, because their HDMI outputs are not recorded.
Checked against every mini PC sold on amazon.co.uk, from the specifications we hold for each machine.
Fits (21)
- ACEMAGIC S1
- Apple Mac Studio (M5 Max)
- ASUS ROG NUC 16
- Beelink SER8
- Dell Pro Max Micro FCM2250
- GEEKOM A9 Mega
- GMKtec EVO-X2
- GMKtec M8
- GMKtec NucBox K11
- GMKtec NucBox K13
- GMKtec NucBox K8 Plus
- GMKtec NucBox M6 Ultra
- HP Z2 Mini G1a
- Lenovo ThinkCentre neo 50q Gen 5
- Lenovo ThinkCentre neo 50q Gen 6
- Lenovo ThinkStation P3 Tiny
- Lenovo ThinkStation P3 Tiny Gen 2
- Lenovo ThinkStation P3 Ultra SFF Gen 2
- MINISFORUM MS-02 Ultra
- MINISFORUM MS-02 Ultra 235HX
- MINISFORUM MS-S1 Max
Fits, with a note (20)
- Apple Mac mini (M5 Pro): 240 Hz at this resolution is not confirmed for this machine's output.
- Apple Mac mini (M6): 240 Hz at this resolution is not confirmed for this machine's output.
- ASUS NUC 14 Performance: 240 Hz at this resolution is not confirmed for this machine's output.
- ASUS NUC 14 Pro: 240 Hz at this resolution is not confirmed for this machine's output.
- ASUS ROG NUC: 240 Hz at this resolution is not confirmed for this machine's output.
- Beelink EQ14: 240 Hz at this resolution is not confirmed for this machine's output.
- Beelink EQi12: 240 Hz at this resolution is not confirmed for this machine's output.
- Beelink EQi13: 240 Hz at this resolution is not confirmed for this machine's output.
- Beelink EQR5: 240 Hz at this resolution is not confirmed for this machine's output.
- Beelink EQR6: 240 Hz at this resolution is not confirmed for this machine's output.
- Beelink ME mini: 240 Hz at this resolution is not confirmed for this machine's output.
- BOSGAME M5: 240 Hz at this resolution is not confirmed for this machine's output. The monitor's 90 W power delivery will not run the mini PC.
- GMKtec NucBox G10: 240 Hz at this resolution is not confirmed for this machine's output.
- Lenovo ThinkCentre M70q Gen 5: 240 Hz at this resolution is not confirmed for this machine's output.
- Lenovo ThinkCentre M75q Gen 5: 240 Hz at this resolution is not confirmed for this machine's output.
- Lenovo ThinkCentre M90q Gen 5: 240 Hz at this resolution is not confirmed for this machine's output.
- Lenovo ThinkCentre M90q Gen 6: 240 Hz at this resolution is not confirmed for this machine's output.
- MINISFORUM MS-01: 240 Hz at this resolution is not confirmed for this machine's output.
- MINISFORUM MS-A2: 240 Hz at this resolution is not confirmed for this machine's output.
- MINISFORUM UM890 Pro: 240 Hz at this resolution is not confirmed for this machine's output.
Not confirmed (2)
- ASUS ROG NUC 15: Not confirmed: no record of this machine's HDMI outputs.
- Beelink GTi14 Ultra: Not confirmed: no record of this machine's HDMI outputs.
Before you buy
For some machines above, 240 Hz at this resolution is unconfirmed, so check the output before counting on the full refresh rate. MSI does not state a Thunderbolt input, a built-in KVM switch, daisy chain output or speakers, and does not confirm HDR support beyond that certification.
Common questions
Can I connect it to a mini PC over USB-C?
The monitor has a USB-C video input with 90 W power delivery, so a mini PC USB-C port that carries video can drive it. MSI does not state a Thunderbolt input.
Will it run at 240 Hz on my mini PC?
The panel does 240 Hz at 3840x2160, but the machine's output must carry it. For the Lenovo ThinkCentre M90q Gen 5, MINISFORUM AI X1 Pro and ACEMAGIC V1 that is not confirmed.
Can I put it on a VESA arm?
Yes, it has a VESA mount, so an arm or wall bracket that matches that standard can hold it. MSI does not state whether it has speakers, so plan for separate audio.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.co.uk at the time of purchase will apply to the purchase of this product.