Who you gonna call? The Blur Busters! For Everything Better Than 60Hz™
https://forums.blurbusters.com/
It’s DSC.
You can try, so long as it's below 1440p, but no guarantees; 240Hz 1440p 8-bit 4:4:4 chroma maxes out the non-DSC/native bandwidth of DisplayPort 1.4.JediBrysen wrote: ↑21 Dec 2023, 15:51Can I do 250Hz without DSC?
thats weird it says for 2560x1440 that 1440p 250hz is only 27.65Gbps and DP 1.4 can do 32.4Gbpsjorimt wrote: ↑21 Dec 2023, 18:21Unlikely, since 240Hz 1440p 8-bit 4:4:4 chroma maxes out the non-DSC/native bandwith of DisplayPort 1.4.JediBrysen wrote: ↑21 Dec 2023, 15:51Can I do 250Hz without DSC?
Bottom-line; don't buy a DSC monitor if you want to create custom resolutions reliably.
I was speaking generally. It depends on the monitor.JediBrysen wrote: ↑21 Dec 2023, 18:56thats weird it says for 2560x1440 that 1440p 250hz is only 27.65Gbps and DP 1.4 can do 32.4Gbps
Probably frame skipping due to unstable timings (use this test to determine: https://testufo.com/frameskipping).JediBrysen wrote: ↑22 Dec 2023, 02:28got 250Hz to work at 1440p and I can get 290Hz but its unironically less smooth than 250Hz bc of jitter.
Its not frame skipping, this is the most fluid the panel has been since having it imo. 0ms jitter is so nice.jorimt wrote: ↑22 Dec 2023, 09:09I was speaking generally. It depends on the monitor.JediBrysen wrote: ↑21 Dec 2023, 18:56thats weird it says for 2560x1440 that 1440p 250hz is only 27.65Gbps and DP 1.4 can do 32.4Gbps
In the PG27AQN's case, it goes 360Hz 1440p max with DSC on and 240Hz 1440p max with DSC off. I.E. it doesn't have a factory overclock with DSC off that can fully saturate DP 1.4.
That and just because DP 1.4 can support that maximum bandwidth on paper doesn't mean that literally translates in all cases.
A particular monitor's scaler (and whether the scaler is a G-SYNC module or not), the firmware, EDID, etc, can also influence how much and what custom resolutions at what refresh rates you can push.
Probably frame skipping due to unstable timings (use this test to determine: https://testufo.com/frameskipping).JediBrysen wrote: ↑22 Dec 2023, 02:28got 250Hz to work at 1440p and I can get 290Hz but its unironically less smooth than 250Hz bc of jitter.
That said, I don't personally play with custom resolutions myself, so I can't offer much more insight than that.
I was referring to this:JediBrysen wrote: ↑22 Dec 2023, 14:47Its not frame skipping, this is the most fluid the panel has been since having it imo. 0ms jitter is so nice.
If your meaning of "jitter" was something else in this case (achievable frametime/framerate, etc), it wasn't immediately clear.JediBrysen wrote: ↑22 Dec 2023, 02:28I can get 290Hz but its unironically less smooth than 250Hz bc of jitter.
Oh i was meaning jitter by mouse jitter sorry for not clarifyingjorimt wrote: ↑22 Dec 2023, 15:33I was referring to this:JediBrysen wrote: ↑22 Dec 2023, 14:47Its not frame skipping, this is the most fluid the panel has been since having it imo. 0ms jitter is so nice.If your meaning of "jitter" was something else in this case (achievable frametime/framerate, etc), it wasn't immediately clear.JediBrysen wrote: ↑22 Dec 2023, 02:28I can get 290Hz but its unironically less smooth than 250Hz bc of jitter.