Is it worth adding in my GTX460 ?

[ALXAndy]

Cheers Andy.

But what about a 768mb 460? Is more VRAM really needed for a dedicated physx card?

vram did not seem to affect the studies I did, no. What did was the core itself and the clock speed of the core.

What I mean is back in the old days of the stand alone Ageia PPU the card had a clock speed. Now I don't know how the PPU was implemented by Nvidia but I don't think it's a stand alone thing now. Well, what I mean is I don't think it has a separate clock speed and is a separate chip or entity. I think they simply bolted it to the core itself which would mean it operates at the overall clock frequency of the card.

I have seen evidence recently that the Physx part of a graphics card can actually die without affecting the rest of the card so it must be a stand alone entity. However, having a separate clock speed for it doesn't make much sense. I think it's literally plumbed into the core which means it will operate with the core clock speed.

Overclocking a physx PPU for example makes Physx go faster.

 

[wolvers]

Ive always assumed that it's done by the compute section of the core, rather than a special physx part.

 

[tommybhoy]

But what about a 768mb 460? Is more VRAM really needed for a dedicated physx card?

Perfect, vram is not an issue.

 

[ALXAndy]

Ive always assumed that it's done by the compute section of the core, rather than a special physx part.

If that was the case the 79xx cards would batter the 6xx cards on compute performance alone.

Nvidia bought Ageia and I'm pretty sure the Physx PPU is still alive and well on the core somewhere. It isn't separate as you would see it when reviewers break down the cards tbh.

 

[wolvers]

Err, they do. 7970 is something like 20 times faster than a 680 at GPU compute stuff. Not sure what that's got to do with fizzx though?

 

[ALXAndy]

I meant if DC is what does the Physx....

 

[wolvers]

Right, gotcha.

 

[wolvers]

Hmm, I'm reading that hybrid fizzx can't work with fizzx v3.