Physx dedicated GPU for The Witcher 3 ?

[LapX]

Hello, I've seen while googling and searching on the Nvidia forums that all the PhysX calculations of Nvidia Gameworks can be passed to another GPU to handle, and since I have heard it has a great performance hit, and the fact that I have a 660 Ti in a second computer I can easily switch for it's original 7790, I thought why not try it ?

 

But I do have one concern, I read somewhere that using a dedicated PhysX GPU can harm the framerate if the card isn't up to the task.

 

Do you guys think a 660 Ti can handle all the Hair, Fire, Weather effects, Wind interaction and other PhysX related elements while my 970 does the rest ?

 

I will conduct testing of course, and report my findings here if anyone is interested, but I'd like to get an idea beforehand.

 

Thanks

 

Edit : Found the links  :

 

https://forums.geforce.com/default/topic/829879/what-stuff-would-a-dedicated-physx-card-calculate-/?offset=5#4521923

 

http://physxinfo.com/wiki/PhysX_FleX

[AlwaysFSX]

Nvidia has locked out PhysX cards if it detects any Radeon card. And in general, PhysX cards are never worth it.

[Jobbe03]

I don't think it'll make a huge difference in performance, but in theory... 

 

Go for it. 

[ImBleu]

You can try it. If you can justify it then go ahead

[VG Docs]

I'm starting to wonder if people just don't like the idea of dedicated physx cards on this forum. Almost everywhere I look online, people have very nice gains in performance with them.

[Samfisher]

It has been tested time and again that a secondary GPU solely for PhysX doesn't really do much in increasing performance.

[LapX]

Nvidia has locked out PhysX cards if it detects any Radeon card. And in general, PhysX cards are never worth it.

You missread, I will be using a 970 and a 660 Ti in this PC, the 7790 is for the other one which I will take the 660 Ti from.

 

Thanks anyway, if it isn't worth it like you said, I won't get my case out because it is quite difficult.

[LapX]

I don't think it'll make a huge difference in performance, but in theory... 

 

Go for it. 

 

 

It has been tested time and again that a secondary GPU solely for PhysX doesn't really do much in increasing performance.

 

I don't see how it would not help if it has the power necessary since it takes load off the principal card.

[incarnate]

I don't see how it would not help if it has the power necessary since it takes load off the principal card.

 

if i had to hazard a guess as to why it doesn't help much if at all.... i would have to guess that it would have to do with splitting the pcie lanes in half and the extra overhead needed to communicate with 2 different cards running two different tasks. again, just a guess.

[Jobbe03]

I'm starting to wonder if people just don't like the idea of dedicated physx cards on this forum. Almost everywhere I look online, people have very nice gains in performance with them.

people don't like it because it isn't viable if you take price in to consideration. 

[X_Rated_Box]

GFI!

[LapX]

if i had to hazard a guess as to why it doesn't help much if at all.... i would have to guess that it would have to do with splitting the pcie lanes in half and the extra overhead needed to communicate with 2 different cards running two different tasks. again, just a guess.

 

I got an x79 motherboard, it has enough lanes.

 

people don't like it because it isn't viable if you take price in to consideration. 

 

Oh... Since I already have the card that isn't a problem, so many people read in diagonal on this forum x)