BenQ MOBIUZ EX321UX
3840 x 2160Up to 144HzIPS with Mini-LED backlight (1152-zone)DSC decoder: YES
Maximum verified mode per connector
This is where HDMI and DisplayPort usually differ. Both figures are at native resolution.
| HDMI | 3840x2160 @ 120Hz |
|---|---|
| DisplayPort | 3840x2160 @ 144Hz (no DSC) |
Inputs
| Connector | Version label | Count | Documented input ceiling |
|---|---|---|---|
| HDMI | HDMI 2.1 | 3 | not separately published |
| DisplayPort | DisplayPort 2.1 | 1 | ~38.69 Gbps payload |
Officially documented timing modes
| Connector | Mode | DSC | Source grade |
|---|---|---|---|
| DisplayPort | 3840x2160 @ 144Hz | NO | C |
| HDMI | 3840x2160 @ 120Hz | UNKNOWN | C |
HDR, VRR, colour depth
| HDR | YES - HDR10, VESA DisplayHDR 1000 (confirmed) |
|---|---|
| VRR | YES - AMD FreeSync Premium Pro (official). Not NVIDIA G-SYNC certified - works via generic Adaptive-Sync only (Tom’s Hardware). (confirmed) |
| Max colour depth | 10-bit |
Notes
BenQ publishes no accessible PC timing table for this model, so all per-mode data is Grade C (TFTCentral). DisplayPort 2.1 negotiates UHBR10 (~38.7 Gbps effective) per BenQ’s statement to TFTCentral. HDMI 2.1 is empirically capped at 4K/120Hz - the headline 144Hz is DisplayPort-only. Pre-firmware-V5 (2024-11-25) DP 2.1 bandwidth bug: 10-bit 4:4:4 4K144 forced DSC / negotiated only 32 Gbps; the V5 release note is "Fix DisplayPort v2.1 bandwidth bug" and no independent re-test after the fix was found.
Last verified: 2026-09-02 (seed data).
Check a graphics card against this monitor
NVIDIA GeForce RTX 5070Run a checkNVIDIA GeForce RTX 5080Run a checkNVIDIA GeForce RTX 5090Run a checkAMD Radeon RX 9060 XTRun a checkAMD Radeon RX 9070 XTRun a checkNVIDIA GeForce RTX 4070 SUPERRun a checkNVIDIA GeForce RTX 4070 Ti SUPERRun a checkNVIDIA GeForce RTX 4060Run a checkNVIDIA GeForce RTX 4060 TiRun a checkAMD Radeon RX 7600Run a checkAMD Radeon RX 7800 XTRun a checkNVIDIA GeForce RTX 4090Run a checkAMD Radeon RX 7900 XTXRun a checkAMD Radeon RX 6600Run a checkNVIDIA GeForce GTX 1080 TiRun a check