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Crossfire help - Page 2

post #11 of 24
Thread Starter 
Anybody?
post #12 of 24
It would be better answered if you update your sig rig with what kind of PSU you are running.
A crappy 580wt may only reliably deliver 400-450wt, whereas a quality 580 may deliver up to 650 or more if needed.
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post #13 of 24
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post #14 of 24
it should handle it easily, 5850's are energy misers.
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post #15 of 24
The LE board does not support proper CFX, you'll be limited to 4x on the secondary card.
Get a Pro version.
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post #16 of 24
As I just posted in another thread, 16x-4x results in a loss of about 5% on the 2nd card.
It's in no way worth buying a new mobo for, unless you are just really anal about getting the absolute most performance possible.
http://www.techpowerup.com/reviews/A...caling/25.html
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post #17 of 24
Thread Starter 
Well the MSI P67A-GD55 is only £20 more and has 2 16x PCI-E slots which would be nice and i hear its a nice overclocker!
post #18 of 24
I may be wrong, but according to these specs, that board is actually running one of the PCIe lanes @ 8x.
http://www.thinkcomputers.org/msi-p6...oard-review/2/

Edit: I just dl's the manual for the GD55, and it states directly that the 2nd PCIe slot is indeed an 8x.
http://www.iusermanual.com/ium.php?t...pFdU1TNTZhWEE9
Edited by Nixuz - 2/6/11 at 12:13pm
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Blue Fury
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post #19 of 24
Thread Starter 
Rep to nixuz and kia
post #20 of 24
Quote:
Originally Posted by Nixuz View Post
As I just posted in another thread, 16x-4x results in a loss of about 5% on the 2nd card.
It's in no way worth buying a new mobo for, unless you are just really anal about getting the absolute most performance possible.
http://www.techpowerup.com/reviews/A...caling/25.html
Those aren't even cfx results.

I can tell you from firsthand experience that the 4x slot is a handicap when running cfx.
Granted that most of the time without an fps counter you wouldn't notice.

I'll use BC2 as an example, I experienced many noticeable slowdowns at 16x/4x, 8x/8x exhibited no such slowdowns.

The 4x card is always 10-20% bottlenecked.


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Mighty-iTX
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Mighty-iTX
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