physx performance hit on nvidia cards

[xMishax]

Is there a big difference in fps between turned on and turned off physx on nvidia cards?  For example gtx 960 or gtx 970?

[Oshino Shinobu]

Depends on the game. Most of the time, no. 

[Guest]

PhysX is owned by Nvidia, so I would say very little to no hit at all.

 

But AMD on the other hand, may get a little grumpy.

[Nexxus]

physx can absolutly tank ones FPS go download the Mafia 2 demo to find out yourself.

 

http://www.geforce.com/whats-new/guides/mafia-2-tweak-guide#10

[xMishax]

PhysX is owned by Nvidia, so I would say very little to no hit at all.

 

But AMD on the other hand, may get a little grumpy.

Well I remember when I played Mirrors Edge on my HD 5770 It was nice and smooth, but then I noticed that mark which was called physx - horrible things happened

[xMishax]

PhysX can tank your performance. Mafia 2 can get messy and Borderlands 2/Pre-Sequal is the same. Metro games I barely notice a performance hit. I think it depends upon the developer and what they are doing with it. Like Borderlands when I'm doing the harder missions and there are a lot of particles flying everywhere I can feel the lag here and there. Although I think Borderlands shows what PhysX is all about, a shit load of particles and a lot of cloth simulations, it looks pretty badass. The blood and gore in Borderlands looks cool with the fluid simulations.

Do horrible things happen even for nvidia harware with physx on??

[Nexxus]

Do horrible things happen even for nvidia harware with physx on??

You cant turn phyx on without nvidia hardware. Period. If its a toggleable physx setting it wont work on anything but nvidia.

[Un4tural]

it depends, some games tank it some don't. i think it would be felt more with earlier cards that came with it (i think 9xxx series came with on board physx? maybe 8xxx too. for those it would noticeably hit it. nowadays it's not as obvious for the most part i think, if it does you could get a dedicated physx card (another nvidia card) to just do the physx calculation. that way you shouldn't get an impact. (i think it's still a thing? to set a dedicated physx card?) 

 

i've seen some benchmarks on it, it does help a fair bit on some games. 

[Curufinwe_wins]

Btw. If running dual or 3+ sli, in most physx games it is actually more efficient (for fps) to set one card to only do physx while the rest work regularly.

It's been a bad joke that 3 way sli works wonders on batman games (aka 2 way sli plus one physx card.)