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Gigabyte GA-MA790X-UD4 PCI-E Question

post #1 of 3
Thread Starter 
Take a look at my Blue Beast specs. I just installed a 8800GTS in my x8 PCI-E slot underneath my GTX570 to run PhysX in games that use it, HOWEVER... I just discovered that the two slots share bandwidth, which means my GTX570 - if I understand correctly - is now running at PCI-E x8 band width instead of x16. Hmmm.... Am I going to notice the difference in games? Would it be better to take the 8800GTS out and just allow the GTX570 to run the PhysX in games that call for it?
Mr. Blue
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Mr. Blue
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post #2 of 3
It would be better to run just the gtx570 alone. The bandwidth reduction is one problem but more so dual independent GPUs never work too well. And besides the GTX 570 is so much more powerful than the 8800gts that the little advantage you would gain by offloading PhysX would be lost by the all the overhead in communication because they can't communicate directly they must both go through the HTT and the CPU which means that you are likely to run into bottle neck.
Sandy Thunder
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QuickSilver X1
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Sandy Thunder
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QuickSilver X1
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post #3 of 3
Thread Starter 
Quote:
Originally Posted by DSP1 View Post
It would be better to run just the gtx570 alone. The bandwidth reduction is one problem but more so dual independent GPUs never work too well. And besides the GTX 570 is so much more powerful than the 8800gts that the little advantage you would gain by offloading PhysX would be lost by the all the overhead in communication because they can't communicate directly they must both go through the HTT and the CPU which means that you are likely to run into bottle neck.
So what you are saying is the two cards won't play well together. While I was waiting for a reply I looked up the difference between x16 and x8 and apparently there wouldn't be much of a drop off and probably not noticeable, unless I were to play an EXTREMELY graphics intensive game, e.g., Metro 2033, Crysis and Crysis 2, etc.
Mr. Blue
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Mr. Blue
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