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5870 CrossFire problems

post #1 of 5
Thread Starter 
Hi there.

So I just installed another 5870, and sometimes I notice that alt-tabbing out of a full-screened game or video often results in a black screen for a minute or so, and then the windows switch. The computer isn't really frozen, as I can hear music playing in the background still and it eventually (but slowly) switch over.

Also, is the primary card supposed to always be under 100% load? I just noticed that it was in GPU-Z. I am also currently using 10.12 Catalyst drivers.

Disabling CrossFire and re-enabling it will get rid of the black screen lag, but it comes back randomly later.

Any thoughts?

Also - no overclocks of any kind.
Edited by bfeng91 - 1/31/11 at 10:45pm
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post #2 of 5
Alt tabbing out of full screen actually disables crossfire. It isn't unusual for the screen to blank out for roughly 3-5 seconds at the most. But for a minute - something is definitely out of whack.

Prior to installing your second 5870 did you uninstall your drivers and use drive sweeper? I know these drivers can be a pain unless you do a clean install with any hardware changes.
    
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post #3 of 5
Thread Starter 
Yeah I cleared out all drivers, nvidia and ati alike and fresh installed the 10.12. Think reinstalling drivers would help?

And just wondering, how does it disable crossfire?
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post #4 of 5
Crossfire only renders in full screen mode.

Ugh I didnt realize your running an nvidia card as well - I didn't have much success running my 8800GTX along side my 5870s...all kinds of weirdness, crashing, pausing, you name it.
    
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post #5 of 5
Thread Starter 
I'm actually not, I took the 9800gtx to make room for the 5870. As of now, it's simply just crossfire 5870's, one watercooled and one not.

What about that 100% load on the main card? Thats kinda funky...because I literally was just sitting at the desktop...
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