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2x 5770's and a 5750 in Trifire?

post #1 of 25
Thread Starter 
Is this possible? and about what card will this be equal too? (2 5770s should be 5870 power, right?)

Also the 5750 will have to be in a PCI slot.. will that work? and i need a riser beacuse i don't want to cut this board. can someone link me to a riser?
    
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post #2 of 25
I don't think you can crossfire 5770's wth 5750's
post #3 of 25
Thread Starter 
Quote:
Originally Posted by Aperture;13853525 
I don't think you can crossfire 5770's wth 5750's

I did it before, with 1 5770 and 1 5750.
    
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post #4 of 25
since when is there a 5750 pci version? Get something like this and put it in your bottom pcie x1 slot [ame="http://www.amazon.com/StarTech-com-Express-Profile-Extension-PEX1TO162/dp/B0039XPS5W/ref=sr_1_9?s=electronics&ie=UTF8&qid=1307969361&sr=1-9"]Amazon.com: StarTech.com PCI Express X1 to X16 Low Profile Slot Extension Adapter (PEX1TO162): Electronics[/ame]
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post #5 of 25
Thread Starter 
Quote:
Originally Posted by overclockingXTC;13853542 
since when is there a 5750 pci version? Get something like this and put it in your bottom pcie x1 slot Amazon.com: StarTech.com PCI Express X1 to X16 Low Profile Slot Extension Adapter (PEX1TO162): Electronics

There is no 5750 PCI version, thats why i need a riser....
Is their a cheaper riser? i thought they were only a few bucks?
    
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post #6 of 25
you probably already know this since you have crossfired the 5770 and the 5750, but the two higher cards will automatically downclock to the speed of the 5750 (or whatever the lowest card is)... just so it is clear.
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post #7 of 25
Thread Starter 
Yes i do know this... it will end up equaling three 5750's?
Still, better than xfiring 2 5770's however right?
    
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post #8 of 25
if this holds true, you are correct.

http://www.overclock.net/amd-ati/693912-tri-fire-v-cross-fire.html

I would suspect 3 5750's would give you performance somewhere between a 5850 and 5870... but I dont know a ton about tri-fire. The 5000 series didn't scale nearly as well in crossfire and tri-fire setups as the 6000 series is doing.
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post #9 of 25
You cannot get a PCI to PCIe riser. PCI bandwith is tiny compared to PCIe, not to mention it phisically couldn't work. Just crossfire the 5770's.
     
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post #10 of 25
So if you flash an overclocked bios onto the 5750 will the 5770 only downclock to the overclocked 5750 speeds?
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