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THE ACTUAL PRODUCT
MSI MAG 321UP QD-OLED monitor on its supplied stand, official front view with manufacturer sample screen artwork
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MSI MAG 321UP QD-OLED

31.5-inch · 3840 × 2160 · 165 Hz · MSI global specification

31.5-inch QD-OLED monitor with 3840 × 2160 native resolution and a listed 165 Hz maximum. USB-C provides display input and up to 15 W charging.

Reviewed 8 Sept 2026Manufacturer specifications, not a hands-on test.
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WHAT IT BRINGS

The useful part.

Combines 3840 × 2160 resolution with USB-C display input and up to 15 W charging.

Manufacturer source
BEFORE YOU CHOOSE

The checks that matter.

This UP configuration is rated for 165 Hz, not the UPX’s 240 Hz. Its 15 W USB-C charging output may be insufficient for a laptop’s charging requirement.

Manufacturer source
NOTHING HIDDEN IN THE SMALL PRINT

Every specification.
With its source.

Our publishing standard
Screen diagonal
31.5 in
Conditions & context

Manufacturer specification · Manufacturer panel diagonal; rounded size printed on marketing imagery may differ.

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Native resolution
3840 × 2160
Conditions & context

Manufacturer specification

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Refresh rate
165 Hz
Conditions & context

Manufacturer specification · DisplayPort: up to 165 Hz; HDMI: up to 165 Hz; USB-C DisplayPort Alt Mode: up to 165 Hz, at native 3840 × 2160 resolution. Source, cable and selected mode must support the signal.

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Panel technology
QD-OLED
Conditions & context

Manufacturer specification

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Inputs and versions
1 × DisplayPort 1.4a; 2 × HDMI 2.1; USB-C DisplayPort Alt Mode with up to 15 W Power Delivery; headphone output
Conditions & context

Manufacturer specification · DisplayPort: up to 165 Hz; HDMI: up to 165 Hz; USB-C DisplayPort Alt Mode: up to 165 Hz, at native 3840 × 2160 resolution. Source, cable and selected mode must support the signal.

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Dimensions with stand
717 × 242 × 457 mm (width × depth × height, with stand)
Conditions & context

Manufacturer specification · Manufacturer dimensions with stand, reordered width × depth × height where required. Stand depth is not panel thickness and excludes additional cable clearance.

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Stand depth
242 mm
Conditions & context

Manufacturer specification · Manufacturer dimensions with stand, reordered width × depth × height where required. Stand depth is not panel thickness and excludes additional cable clearance.

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Aspect ratio
16:9
Conditions & context

Manufacturer specification

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Declared brightness
250 cd/m²
Conditions & context

Manufacturer specification · Manufacturer SDR/typical brightness specification, not measured luminance or full-screen HDR peak.

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Static contrast claim
1500000:1
Conditions & context

Manufacturer specification · Manufacturer static contrast claim, not an independent image-quality result.

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Adaptive sync
AMD FreeSync Premium Pro
Conditions & context

Manufacturer specification · Manufacturer-listed support; source, port, driver and mode requirements apply.

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VESA mounting pattern
100 × 100 mm
Conditions & context

Manufacturer specification

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Colour depth
10-bit
Conditions & context

Manufacturer specification · FRC is retained where stated; not relabelled as native bit depth.

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Response method and claim
0.03 ms GtG
Conditions & context

Manufacturer specification · Manufacturer claim with its original method. GtG, MPRT and end-to-end input lag are different measurements; this is not a test result.

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HDR support
DisplayHDR True Black 400
Conditions & context

Manufacturer specification · Certification listed by MSI; no independent testing performed by Versus.

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Stand height travel
110 mm
Conditions & context

Manufacturer specification · Adjustment travel, separate from assembled monitor height.

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USB-C charging
15 W
Conditions & context

Manufacturer specification · Maximum charging output, not the monitor’s power consumption. Compatible device and cable required.

Source
PUT IT IN PERSPECTIVE

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