iRacing Detailed Setup Guide for Pimax 5k+

Guys, there’s something I don’t get.

On screen, I disable vertical sync and the iRacing FPS meter shows me 300/400 FPS, GPU usage near 100% on afterburner.

In VR while in game, the iRacing FPS meter shows me 70FPS, I have 8ms on steamVR latency ( which is below 11.1ms so it’s quite good ) but only 60% GPU usage on afterburner.

Why isn’t my GPU going 95/100% ? How can I set my gpu to go full power ?