MSI G321CU

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

Manufacturer surface description.

Manufacturer specification for each axis.

DisplayPort: up to 144 Hz; HDMI: up to 144 Hz; USB-C DisplayPort Alt Mode: up to 144 Hz, at native 3840 × 2160. The source, cable and selected mode must support the signal.

Separate from the manual's 4 ms GtG figure; neither is input lag.

AMD FreeSync Premium. Enabling it disables PIP/PBP and Optix Scope and changes 1:1 screen size to Auto; those modes can also disable FreeSync.

PIP/PBP and Optix Scope cannot stay active with FreeSync Premium.

MSI's datasheet lists 3840 × 2160 up to 144 Hz over USB-C; needs a compatible source and cable.

3840 × 2160 at 144 Hz needs HDMI 2.1 set to '4K 144Hz – PC' (manual pp. 18, 22–23); the console setting is 4K 120 Hz. PIP/PBP locks this setting.

Exact signal-frequency row; not proof of adaptive-sync range for every input.

Blur-reduction (MPRT) figure, not GtG or input lag. MPRT Sync needs a refresh rate above 85 Hz and disables USB-C charging.

Manual p. 20 lists 4 ms GtG separately from 1 ms MPRT.

Needs a refresh rate above 85 Hz. Locks response time and brightness; disables HDCR, PIP/PBP, Optix Scope and USB-C charging. HDR and 1:1 screen size also disable it. MSI does not say whether it runs with FreeSync.

MSI does not say whether MPRT Sync and FreeSync can run together. · The manual calls the mode MPRT Sync but does not say whether it runs with FreeSync Premium.

Needs a refresh rate above 85 Hz. Locks response time and brightness; disables HDCR, PIP/PBP, Optix Scope and USB-C charging. HDR and 1:1 screen size also disable it. MSI does not say whether it runs with FreeSync.

SDR typical brightness, not HDR peak.

Static contrast.

Where FRC is listed, the panel uses frame-rate control to reach the stated depth.

HDR Ready as listed by MSI; not a DisplayHDR certification. HDR disables Night Vision, contrast, MPRT Sync, colour temperature, Low Blue Light, Optix Scope, HDCR, PIP/PBP and brightness adjustment.

CIE 1976 basis; percentages above 100% are relative volume.

Colour count reached with FRC, not a native 10-bit panel.

One USB-C DisplayPort Alt Mode input. Charging is up to 15 W but disabled by MPRT Sync. MSI's overview and manual disagree on USB data transfer.

MSI's video-port table says DisplayPort 1.4a but the connection caption says 1.4b. · Input counts and types.

Up to 15 W (5 V / 3 A). Turning on MPRT Sync switches USB-C charging off.

MSI's documents give different DisplayPort revisions (1.4a and 1.4b). · MSI's specification page and PDF table say DisplayPort 1.4a; the PDF connection diagram says 1.4b.

PIP/PBP disables MPRT Sync, FreeSync Premium and Optix Scope, locks response-time and HDMI 2.1 settings, and disables CEC; split-screen modes use separate 60 Hz timings.

USB data-transfer support is disputed. · MSI's overview advertises USB-C data transfer, but the manual (p. 7) says the port supports video signals only, not data.

Manual p. 23: PIP supports Full HD, QHD and UHD at 60 Hz. PBP supports 960 × 2160 and 2880 × 2160 at 60 Hz in Mode 1, and 1920 × 2160 at 60 Hz in Mode 2; the 2160p rows exclude USB-C.

Manual p. 7 labels CEC on the first HDMI input; needs a compatible source. PIP/PBP switches it off.

MSI does not list height adjustment for this model. · MSI's datasheet and manual (p. 5) list tilt only.

Only tilt is stated in the sheet; omitted height, pivot and swivel are not proven absent.

MSI does not list portrait pivot for this model. · MSI's stand instructions and specification do not mention pivot.

MSI does not list swivel for this model. · MSI's stand instructions and specification do not mention swivel.

Lock slot only; no lock included.

Datasheet W×D×H and manual p. 21 W×H×D agree after reordering axes. This is assembled size; allow additional cable clearance.

Manufacturer dimensions with stand, shown width × height × depth. Stand depth is not panel thickness and excludes additional cable clearance.

Panel active area, not external chassis dimensions.

Second triple is explicitly Without Stand; cable and mounting clearance are additional.

Manual p. 21 net weight; MSI does not say whether the stand is included.

Gross figure in manual p. 21, not product-only mass.

Stand inclusion is unspecified. · The manual gives 5.9 kg net and 8.6 kg gross without saying whether the stand is included.

Supply-input range, not operating power consumption.

Operating consumption is unknown. · The manual lists adapter ratings (19 V, 4.74 A output) but no typical operating wattage.

Adapter YJS090G-1904740D, output 19 V / 4.74 A (manual p. 20). MSI does not list typical operating wattage.

Directional navigation with configurable hotkeys. Available shortcuts include input, PIP/PBP, brightness, Night Vision and Optix Scope; availability depends on the active mode.

OSD dark-area adjustment; disabled with HDR.

OSD crosshair with white, red or automatic colour, position and reset controls. Can be enabled alongside Optix Scope; no gameplay benefit guaranteed.

Central magnifier with 1.5×, 2× and 4× settings. Enabling it disables MPRT Sync, FreeSync Premium and PIP/PBP; HDR disables it. Not whole-screen resolution enhancement.

OSD colour-temperature adjustment that warms the display; Anti-Blue mode forces it on and HDR disables it.

Does not apply with Anti Motion Blur/MPRT on.

One headphone output; MSI does not list speakers.

MSI does not say whether speakers are built in. · The manual lists a headphone jack but does not say whether speakers are built in.