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post #61 of 269
Quote:
Originally Posted by Pentium4 531 overclocker View Post
well, im no nvidia pro, but logic can tell you a lot, ok, physx is a pretty demanding feature in games, so to have only 1 GPU do physx and everything else. would lower performance, but if you take the physx load off of the GTX 480 than you could have the GTS run all ur physx and give your GTX 480 more headroom to do other stuff, thats just wut i think, try it out, wuts the harm?

and also @ XX55XX yeh you can do physx with that card, its not a typo
Yh that's quite right. Anyway, wot others say is if you wish to use a dedicated PhysX card together with your main gfx card then the card doing the PhysX stuff should at least have half the CUDA cores of your main gfx card. To be honest, I have no clue whether it is true or not. I read that GALAXY was about to rls a GTX 480 with a integrated GT240 PPU. This should be a good sign. However, there might be some difference between an onboard PPU and a dedicated PhysX card.
post #62 of 269
Quote:
Originally Posted by FL00D View Post
Yh that's quite right. Anyway, wot others say is if you wish to use a dedicated PhysX card together with your main gfx card then the card doing the PhysX stuff should at least have half the CUDA cores of your main gfx card. To be honest, I have no clue whether it is true or not. I read that GALAXY was about to rls a GTX 480 with a integrated GT240 PPU. This should be a good sign. However, there might be some difference between an onboard PPU and a dedicated PhysX card.
so just read up on both GPUs, and see if its worth it, or just go all in and benchmark
    
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post #63 of 269
Quote:
Originally Posted by BriSleep View Post
Just to keep this up to date, I have since done a lot of research and testing. I have 2 Vanilla Evga Gtx 480's, have tested them all kinds of combinations and borrowed my neighbors Gts 250. One 480 by itself will run a game and the Physx processing just fine on it's own, you get about a 7% drop in fps in Batman AA and Cryostasis when you run Physx>>Gpu. However, with the new 257 drivers, if you have a 4+ core cpu, you can set it to Physx>>Cpu, no drop in fps at all.

When in Sli with the 2 480's and the Physx set to automatic it doesn't seem to affect them at all. If you add the Gtx 250, not in Sli but have the drivers dedicate Physx to it, it will bring down the fps by 9-11%. If you have the Physx run on the second 480 in an x16 slot it only dropped the fps about 3%, more in Cryostasis than in Batman, perhaps it's something to do with DX11?? When you set the 2 480's to Sli and put Physx off on the Cpu, there is no difference than when set to automatic.

I haven't run them with the Physx indicator on yet to see where it's being handled so don't ask, I don't know. I got delayed by one DOA card and one defective card, I had to start all over. I will know in a week or 2.

For you Nvidia fanboys, one Gtx 480, in most benchmarks and games will beat out a 5870 with 100Mhz overclock by 30 to 36.7%. So the ATI fanboys that tell you the $100- extra you pay for a 480 isn't worth it. If you pay $400- for a base 5870 and $500- for a base 480, then you've paid 8% more for an 18% performance gain. I think it's worth it.
According to this post, popping a GTS 250 in my cfg wouldn't rly improve anything. In fact, that would lower the performance. :S Now wot?!
post #64 of 269
Let me keep this topic up to date. So, I bought a GTS250 512MB and I'm quite impressed so far. In games like Batman AA a GTS250 undoubtedly improves performance a lot. In 3DMarkVantage I got lower socre but the explanation is really straightforward. When PhysX is enabled CPU tests in Vantage are performed by the GPU. Of course a GTX 480 will score a lot better than a GTS250. So that is the very reason why people get lower scores in 3DMV when they use a dedicated PX card with a GTX 480. I'll play Metro 2033 later today and tell you the difference between using a gts250 for PX and using a single GTX 480. So stay tuned.

Cheers,
post #65 of 269
So, how was it? Been a few days now.
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post #66 of 269
Quote:
Originally Posted by Mas View Post
So, how was it? Been a few days now.
lol its been a few days too, im just an ATI guy helpin out on a nvidia thread cuz i actually know a few things on the nvidia side
    
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post #67 of 269
I'm just curious as to FL00D's findings. I'm getting a couple of 480s soon and have a spare 260 lying around that I could throw in for PhysX when they arrive.
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post #68 of 269
Quote:
Originally Posted by Mas View Post
I'm just curious as to FL00D's findings. I'm getting a couple of 480s soon and have a spare 260 lying around that I could throw in for PhysX when they arrive.
how about just throw that GTX 260 at me
    
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post #69 of 269
No thanks, if I don't use it as a PhysX card, I'm using it to build an extra HTPC in the bedroom
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post #70 of 269
Quote:
Originally Posted by Mas View Post
No thanks, if I don't use it as a PhysX card, I'm using it to build an extra HTPC in the bedroom
NO! SMEAGLE MUST HAVE IT!!

jks, it would make a great HTPC, actually a bit much for a HTPC, but there is no such thing as overkill rite ?
    
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