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HD 5770 and 5750 crossfire

Last response: in Graphics & Displays
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July 7, 2012 10:05:18 PM

Just got these two cards all set up in my machine and now im having some issues with getting them to work in-game. I mainly play SWTOR and Battlefield 3, but neither of these games are really pushing my second card to the limits. I am using multiple hardware monitors (CCC, MSI Afterburner, and GPU-z) to see the temps and core usage. Card 1 is at 100% and Card 2 usually sits at 0 but might jump up to 14% every minute or so. Im still getting poor performance on max graphics on both games. From what I have read, both games should utilize crossfire, with the latest drivers and profiles. I can't seem to fix this issue.

Any ideas?

More about : 5770 5750 crossfire

July 7, 2012 10:14:07 PM

ive tried the 12.6 and 12.7 beta drivers.
Yes, I have a crossfire bridge
Yes, Crossfire is enabled
I have some random Ultra 650w psu
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July 7, 2012 10:14:39 PM

also installed the profiles
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July 7, 2012 10:29:06 PM

i7 2600k
Asus p868 v-le
Main monitor is 1920x1080 and the second monitor is 1280x1024
8gb Ram 1333mhz
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July 7, 2012 10:54:36 PM

I just switched the two cards (5750 now on top) and the 5770 is showing 0%. Since im running at 4x on one card does that explain why whatever card on the second slot isnt even ramping up in any of my games?
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July 7, 2012 10:59:59 PM

Finally got it to work. Im getting twice the performance in the Unigene Heaven benchmark. Seems good enough to me
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July 7, 2012 11:15:03 PM

5750 is top card with stock clocks
5770 on bottom (obviously) clocked down to 5750 speeds
Changed some setting in bios that said something like 16x/4x

Booted up and went from AVG. 30fps to AVG 65fps.

Sounds like a deal to me
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July 7, 2012 11:35:50 PM

Correct. BUT, I just switched them back and clocked the 5750 UP to the 5770, making the benchmark crash. So no im tweaking the clocks to get the best performance. I figured that I better have the better card as the main one so that when I play a game that isn't CF supported that im getting the best performance.
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July 7, 2012 11:46:54 PM

Well, I had the 5770 in the 4x slot when I got it to work for the first time, then once I got the magic trick, I switched them back.
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