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Dedicated Physx Benefits?

post #1 of 40
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I will be upgrading to a GTX 580 shortly.

I happen to have an 8800GT lying around from my old system a few years ago which I don't use anymore.

I heard I can put this in as a dedicated Physx card?

If so, would this be recommended if I go with a GTX 580? Are there any noticeable performance or benefits by doing this?

I figured it would be hard to sell this off anyway and even IF I do, it won't go for much,.
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post #2 of 40
well, it wont make much difference if its a gtx580 tbh..
it may even get bottlenecked. (gtx 580 wait for 8800 gt to finish doing physx calculation in this case)
    
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post #3 of 40
I wouldn't do that with an 8800gt. The GTX 580 is powerful enough to run physx and do the game rendering as well. Using the 8800gt is actually going to give you lower frame rates than if you ran just the GTX 580 because the 8800gt is too slow to do physx. Nvidia usually recommends at least a GTS 250 in most of the games with Physx.
post #4 of 40
Thread Starter 
Yeah I figured, but like I said, I just have this lying around collecting dust.. hard to sell it off too and not worth the trouble. I figured it shouldn't do any harm if I could put it to some good use right?

There can't possibly any downsides to having a dedi physx card, other than the additional power draw but that's not an issue I am worried about.
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post #5 of 40
Quote:
Originally Posted by brackberry View Post
Yeah I figured, but like I said, I just have this lying around collecting dust.. hard to sell it off too and not worth the trouble. I figured it shouldn't do any harm if I could put it to some good use right?

There can't possibly any downsides to having a dedi physx card, other than the additional power draw but that's not an issue I am worried about.
do folding on that card.
    
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post #6 of 40
Thread Starter 
Quote:
Originally Posted by muels7 View Post
I wouldn't do that with an 8800gt. The GTX 580 is powerful enough to run physx and do the game rendering as well. Using the 8800gt is actually going to give you lower frame rates than if you ran just the GTX 580 because the 8800gt is too slow to do physx. Nvidia usually recommends at least a GTS 250 in most of the games with Physx.
Hmm interesting. Thank you for your insight. I guess in that case I won't be using the 8800 as a dedi physx card then.

Just read up on a few articles it seems like a dedi card would be most beneficial for the older 200 series or lower-end cards to offload physx processing off of the main card/GPU.

Back to dust collecting!
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post #7 of 40
Quote:
Originally Posted by brackberry View Post
Yeah I figured, but like I said, I just have this lying around collecting dust.. hard to sell it off too and not worth the trouble. I figured it shouldn't do any harm if I could put it to some good use right?

There can't possibly any downsides to having a dedi physx card, other than the additional power draw but that's not an issue I am worried about.
Yes there are downsides depending on the card you use for physx. Like I said in my previous post, using the 8800gt for physx with a 580 is actually going to lose you performance. If you really want to use it for something, use it as a dedicated folding card.
post #8 of 40
Thread Starter 
Quote:
Originally Posted by cee View Post
do folding on that card.
Please elaborate, I'm new to this
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post #9 of 40
Quote:
Originally Posted by muels7 View Post
I wouldn't do that with an 8800gt. The GTX 580 is powerful enough to run physx and do the game rendering as well. Using the 8800gt is actually going to give you lower frame rates than if you ran just the GTX 580 because the 8800gt is too slow to do physx. Nvidia usually recommends at least a GTS 250 in most of the games with Physx.
250 = 8800GT with lower power consumption. The 8800GT is definitely not to slow to run Physx.

OP-I would just use the 580 without the dedicated Physx card. you dont need one with that much power
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post #10 of 40
IIRC it's usually recommended that your dedicated PhysX card be at least 1/2 as powerful as your main card to get the maximum performance increase. In this case I guess that would be 450/460? I'll try to find the article I read about it.
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