Nvidia setting: 'Virtual Reality pre-rendered frames'

[World Cup]

What's the best setting here for Index users?

Nvidia has this set to 1 by default, but you could also choose 'Use the 3d application setting'.

Has anybody done any extensive testing to determine what works best?

[professor dodge]

depends how good your cpu is. adding pre-rendered 4 lets your gpu stack them up at a cost of latency. so if your cpu is struggling to keep up you can tell the gpu to let X amount of frames pre-render adding a small amount of latency to your device (very very slight delay in movement)
if you are running smoothly for like 95% of the time but have the odd twitch or stutter you can try setting it to either 2, 3 or 4 frames to help smooth them over. best way is to try it out yourself and see what looks/feels better.

atleast thats my way of understanding it.

[Silenius]

Originally posted by World Cup:

What's the best setting here for Index users?

Nvidia has this set to 1 by default, but you could also choose 'Use the 3d application setting'.

Has anybody done any extensive testing to determine what works best?

Wow, you must be using really old drivers... Nvidia has off, on, ultra. It doesn't have pre-rendered frames anymore long time! I don't know what setup you have, but i was suprised it has very low latency! So use always off to get more fps and prefer maximum performance! Unless of course you have desired fps already...

[World Cup]

I'm using the latest drivers. I think you're looking at something else.

[Silenius]

Originally posted by World Cup:

I'm using the latest drivers. I think you're looking at something else.

Nope. So strange. Nvidia came up new concept of pre-rendered frames long time ago. Check nvidia site. In any case. Cpu has to prepare 1 frame for gpu in advance, so after gpu finishes one frame, it has something to do. Cpu prepares it while gpu renders previous frame. 1 was for least input lag, creates input lag of one frame, depends on your fps and hz. 4 for 4 frames, so there will be huge input lag. Always use lowest number for minimum input lag and highest for maximum performance.

Now off is like 3-4, on is like 1 and ultra is new mode, which should prepare it just in time, also lowers drivers latency. Now we have also ultra low latency mode, which will be implemented into competitive games and work back with 900 series and reduce latency greatly like 30% or more!

It is possible you have old gpu and your drivers don't have it. But i had it even on 780 i think.

[Libre]

Originally posted by Lorne Malvo:

It is possible you have old gpu and your drivers don't have it. But i had it even on 780 i think.

Maybe he does not do a clean install of the Nvidia drivers, and prefers to keep old settings, like me. Anyway I do not see ultra, just 1, apps prefs, 2, 3, 4. I use the Game ready driver, maybe the studio driver uses diferent settings.
Edit: I think you are talking about low latency mode, ?

[Kurai Shidosha]

NEVER change this setting from 1. Especially if you are running a lower frequency headset like 72hz to 90hz. Adding a single frame to the render queue can increase lag by anywhere from 11ms to 14ms. To put this in perspective, back in 2014 when the Oculus dev kit 2 was coming out, target TOTAL latency measurements were targeting 20ms or less, and were around 25ms at 75hz. Stuff like the Vive and Index are below 20ms. Adding 11ms or more to that number is a huge addition of lag and it WILL make you feel nauseous.

[TomahawkJackson]

This is the first result in a Google search for "Virtual Reality pre-rendered frames FPS" - and the above answer is only sort of correct, so I wanted to add to it. If your HMD can run at 120 or 144hz you can use 2 as a setting and not have significantly more input lag than having it set at 1 at 75 or 90 hz.
The difference between 2@120 vs 1@75 is about the same as 1@75 vs 1@90.

2@ 120hz is 0.0166 seconds per frame
2@ 144hz is 0.139 seconds per frame
1@ 75hz is 0.0133 seconds per frame
1@ 90hz is 0.0111 seconds per frame
1@ 120hz is 0.0833 seconds per frame
1@ 144hz is 0.0694 seconds per frame