OK so I’m using the Pimax software with the dream air. I either set the target refresh rate in the menu, or in the Pimax software set at half refresh rate. I’m noticing that both options gives the same results, where the game is sitting at at 1FPS under the target, giving a choppy / stuttery performance.
90Hz I’m sitting at 44FPS, 72Hz 35FPS. It does occasionally jump up to 45FPS (and is much smoother when it does) but it doesnt stay there. I have a high end PC, 5090 etc and if I remove the limit altogether, the FPS jumps up to around 60. So it’s not a limitation of my hardware. Does anyone know whats going on here with this? Thanks
I don’t know about Pimax (I have Quest 3) but shouldn’t the Pimax software automatically try to maintain and limit to half your screen refresh Hz if you use motion smoothing? That’s how SSW works within Virtual Desktop with Quest at least.
However, I found in the past that using RTSS (Riva Tuner Statistics Server - lightweight system tray app) works loads better at locking the frame rate precisely. It could be worth a try for you? Remove limit from in game (and/or Nvidia control panel) and set it in RTSS instead.
I don’t use RTSS any more but in 2020 it was essential for me.
OpenXR (PimaxXR) takes care of that as well. You can simply set the max FPS in the sim to half your refresh, and you should be good to go. I have noticed this being just below the target myself on SteamVR. Are you seeing this in the sim FPS counter? This could have nothing to do with the hardware or the Pimax software, but be a function of where the sim is getting its frame times from, and how it’s doing the math.
I’m using the Pimax monitoring system. When it’s at 45, its quite smooth, but it sits mostly at 44 which causes stutters, so it’s very pleasant.
I used to use that ages ago, maybe I’ll redownload it and give it a go thanks
Yes Pimax does limit it, but as I said above, when I set the limit, it sits 1 frame below the limit, causing stutters.