Dedicated physX card?

I recently came from 670 sli to a 970 and thought, I have 2 670s doing nothing so I left one in my system to use for dedicated PhysX card started playing The Witcher 3 is does absolutely nothing does not increase frame rate at all. Im pretty sure the hairworks is the same as PhysX? by the way single 970 blows 670 sli out the door cant believe how much better it is.

dedicated physx cards died in 2008

It depends on how a game uses PhysX. Some are locked to the CPU. Which means it doesn't matter if you have an Nvidia GPU at all.

Batman get's 15 FPS more with a Dedicated PhysX card.

Witcher 3 is CPU based PhysX.

@awax187187: PLEASE READ THE RULES.

moved to hardware

It's a bad idea.

970 is far more powerful to blink for physx, not mentioning 2x 970s.

IMO sell those 670s or give them to a friend who needs them.

This. Also, 670 SLI is more powerful than a single 970. I had 670 SLI as well and I did benchmarks before swapping to 970 SLI. I compared 670 SLI vs. a single 970 and 670 SLI was around 15% faster if I remember correctly. That may have changed since the 970 launch as Maxwell cards receive better driver support these days and Kepler cards are getting shit on.

Hairworks is not PhysX.

Only a few games use GPU accelerated PhysX. The only games that use GPU accelerated PhysX this year is Hatred, Batman: Arkham Knight, and Killing Floor 2 (when FleX is added).

@PredatorRules: I will be, just waiting for another couple of weeks then im going to buy another 970

@Truth_Hurts_U: What sort of CPU you need for a steady FPS mine dropped dramatically when I enable Hairworks. I have a i7 4770k.

@awax187187:

"PhysX

NVIDIA PhysX is not an adjustable setting in The Witcher 3: Wild Hunt, but its implementation bears mention, as it adds dynamic cloth and destruction effects throughout the game on all platforms.

On PC, where CPUs are capable of far more calculations per second, these effects are more realistic, contain additional particles, and persist for longer in the environment."

"NVIDIA HairWorks

Commonly, fur and hair in games is created by adding polygon strips and transparent textures to a character, and though this is a simple and cheap implementation the result appears completely static and visually uninteresting. With additional layers and some basic animation, quality and realism can be improved greatly, but dynamic movement and accurate shading remains off limits. The solution? NVIDIA HairWorks, which adds tens of thousands of DirectX 11, tessellated hair strands to characters, each reacting realistically to movement and external forces. In addition, the use of individual hairs and layers enables dynamic lighting to permeate throughout each strand and layer, for hairs to be accurately shadowed, and for deeper layers to be self-shadowed by other hairs, improving image quality further still."

Don't do it. It will be too slow to fetch in data compared to a much stronger GPU.

Sell your 670s.

It's kinda pointless, sell your 670's and buy another 970.