Can someone help me understand how frame rate for a VR unit like my HTC Vive works?

Epyx · May 9, 2016

In Elite Dangerous if I am in single card mode (R9 290) i get frame rates (Fraps) over 100fps. As soon as I change to VR it drops and locks at 45fps. Now I know the Vive standard refresh rate is 90fps. Am I seeing 45fps because Fraps is only tabbing every other eyes refresh rate?

Just wondering why the refresh rate is so low? I have crossfire disabled as I understand it is not compatible with VR.

Thanks in advance!

HeavyGroovez · May 9, 2016

Check the GPU frame rate with MSi Afterburner.

It sounds like fraps is reporting the windowed frame rate of the application.

tsh · May 9, 2016

Look at the performance metrics in the Steam VR app settings page. You will probably see actual 45 FPS, as has already been mentioned here https://forums.frontier.co.uk/showthread.php?t=246840

Epyx · Jun 1, 2016

Thanks guys, I have learned a ton since I posted this...for example, the VR experience in Elite is HIGHLY GPU determined...ie the faster your GPU the better the sampling and other support settings to maintain a pleasing high FPS level (IE locked at 90fps)

shadragon · Jun 1, 2016

HeavyGroovez said:
Check the GPU frame rate with MSi Afterburner.

It sounds like fraps is reporting the windowed frame rate of the application.

This. FRAPS is a relatively old program and has no concept of VR hardware.

Can someone help me understand how frame rate for a VR unit like my HTC Vive works?

Epyx

HeavyGroovez

tsh

Epyx

shadragon