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5870 crossfire connectors?

post #1 of 6
Thread Starter 
I got 2 5870 crossfire and wondering if there is any performance benefit adding on another crossfire connector for there to be 2 instead of one.
Ideas?

Cheers
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post #2 of 6
No, Only one crossfire bridge is required.
No performance increase if you add another one.
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post #3 of 6
Quote:
Originally Posted by Kerian View Post
No, Only one crossfire bridge is required.
No performance increase if you add another one.
^^ This (Ive tried it )

Also when you play Crysis, do you get full usage on both cards?

Im trying to figure out a prob im having and wondering if anyone else is suffering from same prob
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post #4 of 6
Quote:
Originally Posted by Mikrouwel View Post
^^ This (Ive tried it )

Also when you play Crysis, do you get full usage on both cards?

Im trying to figure out a prob im having and wondering if anyone else is suffering from same prob

are you sure your definately not using both cards? crossfire will only work in fullscreen, so make sure crossfire is enabled in ccc then check the history of card usage or have gpu-z etc open on another screen while playing
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post #5 of 6
Quote:
Originally Posted by Mikrouwel View Post
^^ This (Ive tried it )

Also when you play Crysis, do you get full usage on both cards?

Im trying to figure out a prob im having and wondering if anyone else is suffering from same prob
Crysis is poorly optimized for multi GPUs, I never had my 3 GPUs running at 100%. Worst I got stuttering with 3 GPUs while I hadn't any with 2.
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post #6 of 6
Quote:
Originally Posted by o Baby Zeus View Post
are you sure your definately not using both cards? crossfire will only work in fullscreen, so make sure crossfire is enabled in ccc then check the history of card usage or have gpu-z etc open on another screen while playing
Yes I have enabled it in CC and it says it is working. It works in COD4 and Furmark but in games like Crysis and BFBC2 I get 99% usage on one and 0% on other
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