VR in 1920x1080 versus 2560x1440

[Blackswan]

Will there be a VR fps jump by going to a lower game screen resolution?

[354thFG_Drewm3i-VR]

Yes, run 640x480 windowed.

[1PL-Husar-1Esk]

Everything is work, all work use resources, higher 2d resolution more pixels to draw - more work. 

Less work for the GPU, drawing VR and 2D in low resolution. Gain is probably marginal but why not, I just noticed mouse can be off when monitor native is very high like 4k or 2,5K

Edited March 8, 2024 by 1PL-Husar-1Esk

[Koziolek]

On 3/8/2024 at 9:08 AM, 1PL-Husar-1Esk said:

Everything is work, all work use resources, higher 2d resolution more pixels to draw - more work. 

Less work for the GPU, drawing VR and 2D in low resolution. Gain is probably marginal but why not, I just noticed mouse can be off when monitor native is very high like 4k or 2,5K

Are you sure it is rendered twice in VR and 2D and not just mirrored to the screen?

Edited March 11, 2024 by Koziolek

[firdimigdi]

It was mentioned by the devs a long while ago, and I validated it via benchmarking (see the benchmarking topic in hardware subforum) that the lowest GPU frametime is yielded by setting the game window to fullscreen and at as low a resolution as practical (depending on your GPU - anything from a 3080 upwards it probably makes no measurable difference if you set it lower than 1080p).

[1PL-Husar-1Esk]

2 hours ago, Koziolek said:

Are you sure it is rendered twice in VR and 2D and not just mirrored to the screen?

It's mirror but that also is work to be done but I probably doubt it's that significantly tasking to care about.

[Youtch]

On 3/11/2024 at 12:04 PM, firdimigdi said:

setting the game window to fullscreen

How much of a difference does setting to fullscreen make?

[firdimigdi]

1 hour ago, Youtch said:

How much of a difference does setting to fullscreen make?

I don't recall exactly, the benchmark comparisons in FPS are there in the thread. For sure though it was at max about .5ms GPU frametime on a 3080TI - it was tangible in graphically intense situations.