Does SteamVR throttle FPS?

[Yr_Majest]

Hi all... I'm pretty new to using SteamVR, but have "some" experience with Unity3d. Right now I'm creating a scene in Unity. For the most part, it's really just an experience, not a game. Just allow someone to wonder around the scene looking at things. Not really exciting, but, cutting my teeth and what not.

Anyway, prior to plugging in SteamVR into my level, I was getting pretty poor FPS despite having an Asus ROC 1080 and Intel i7-7700K. So, I did some investigating and someone had pointed out that if you turn vsync off, you could get better FPS... So I created a script in Unity that has one line of code in the Start() function.

QualitySettings.vSyncCount = 0;

That's all it is. After adding that line of code, my FPS shot through the roof. I'm sure this came at a cost of graphics quality in some way or another... But, my FPS went crazy. Happy camper.

So, I then plug SteamVR into my level, get everything up and running. However, I max out at 90 FPS all the time. I can't get any better than that. Which leads me to wonder, does SteamVR somehow throttle down FPS to a max of 90?


thanks all
Rick

[chasquit]

Yeah, probably you won't get anything higher than 90 FPS because it's the optimal rate for the headset (HDM's display is 90Hz). So SteamVR itself probably have some kind of VSync to cut the frame rate in case it's higher than 90, overwriting your app configuration.

[Yr_Majest]

That makes sense.

[Simply_Apollo]

yeah, but just make sure you don't have G-sync/V-sync on, because it will lock you to 60fps maximum. only reason i know is because i run an ASUS ROG 502VM i7 7700HQ and GTX1060

[Abra]

You need to look at your frame timings to see if it's making any real difference. If the values are lower, then it means that did something good there.