Physics only uses CPU

[Szigyi]

Physics only uses CPU

HELP! In Witcher3 Nvidia Physics only uses CPU. My graphics cards are GTX Titan Black for graphics & GTX 750Ti for Physics.

PC:
CPU i7 5960x, MB: Asus Rampage V Extreme (x99), 64G DDR4 RAM, GTX Titan Black, GTX 750Ti.
Windows 10 Pro 64bit.
Geforce driver version is 355.82 (Physics v. 09.10.0513).
Witcher 3 v: 1.08.3 on GOG.

 

[testclubic]

I'm not sure why we should help on that matter ? The game only uses CPU PhysX that's by design. The good news is : you can get rid of the 750 Ti, save some watts and help saving the planet then ?

 

[buldurz]

There is no fix or tweaks for this problem unfortunately but your cpu is very good i don't get why you should even bothered by physx using cpu.

 

[cyberpunkforever]

you can go to your nvidia (gpu) control panel and select pysx-> gpu

 

[SigilFey]

I believe the developers have forced CPU PhysX as of 1.07 (I think) due to some pretty bad slowdown that certain users were experiencing. I can confirm, on my end, that CPU was the more performance-friendly of the two options. Not sure why they did away with the toggle, but that's the way it went down.

If you cannot force it back to the GPU, don't lose any sleep over it. It likely would have lowered your performance by 5-10 FPS. PhysX performance is the same either way.