Not supported on 4090 system

Vicariously_
Junior Member

12-21-2022, 06:14 PM

I changed the driver for my 4090 to 582.83 a few days back, which let me play at 4k 240Hz briefly. But after restarting the PC, the display settings stopped supporting 4k at that frequency. The * next to 239.97 Hz means choosing it lowers the resolution to around 1440p. It would be really useful if someone could suggest a solution for this issue.

Vicariously_

12-21-2022, 06:14 PM #1

Dingdongyou
Member

220

12-23-2022, 02:18 AM

Review these feedback notes carefully and confirm you're connected with a DP1.4a certified cable. If you're using HDMI, the problems likely stem from that. Consider updating your monitor's firmware as well. Additionally, I notice the 239.99 Hz input appears on my secondary 240Hz 4K display.

Dingdongyou

12-23-2022, 02:18 AM #2

BendoNoel
Member

227

01-06-2023, 09:52 PM

I reinstalled the driver once more, and 4K at 240Hz is back. I’m using the DP cable that came with the Alienware monitor. A DP 2.1 cable will arrive soon—I’m curious if that solves the problem.

BendoNoel

01-06-2023, 09:52 PM #3

I reinstalled the driver once more, and 4K at 240Hz is back. I’m using the DP cable that came with the Alienware monitor. A DP 2.1 cable will arrive soon—I’m curious if that solves the problem.

Pilli_mehu
Member

01-14-2023, 09:29 PM

Question remains, as only DP1.4a is available for 4090.

Pilli_mehu

01-14-2023, 09:29 PM #4

Question remains, as only DP1.4a is available for 4090.

TheTussin
Junior Member

01-16-2023, 02:04 AM

Consider using HDMI on 4090 since HDMI 2.1 offers higher performance compared to DP 1.4a

TheTussin

01-16-2023, 02:04 AM #5

Consider using HDMI on 4090 since HDMI 2.1 offers higher performance compared to DP 1.4a

AnaLuke
Junior Member

01-16-2023, 09:45 AM

It might be possible, though it appears the AW3225QF has issues with HDMI cables.

AnaLuke

01-16-2023, 09:45 AM #6

It might be possible, though it appears the AW3225QF has issues with HDMI cables.

X_FredBear_X
Member

226

01-17-2023, 06:06 AM

If uncertain, go with DDU. Works smoothly with 4K240 10-bit and DSC over DP1.4.

X_FredBear_X

01-17-2023, 06:06 AM #7

If uncertain, go with DDU. Works smoothly with 4K240 10-bit and DSC over DP1.4.

KaisaSD2
Member

01-24-2023, 09:41 AM

I changed to a DP 2.1 cable, and the setup now uses 4k 240Hz by default. Therefore, when a monitor claims to support 4k 240Hz, the included cables won’t actually deliver that performance.

KaisaSD2

01-24-2023, 09:41 AM #8

I changed to a DP 2.1 cable, and the setup now uses 4k 240Hz by default. Therefore, when a monitor claims to support 4k 240Hz, the included cables won’t actually deliver that performance.