i think something is wrong

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Mikkel Yde

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Dec 25, 2013
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i really need help i think something might be wrong with my crossfire setup today i made two benchmarks one of them with crossfire enabled and one with only one gpu in my pc and here are the results this one is with one gpu http://

and this one is with crossfire http://

my pc specs are

Cpu= intel core i5 3470
Mobo= asrock ZH77 pro 3
Gpu= saphire radeon hd 7790

i have been looking around the web and so far the only thing i can think of might be wrong is the Motherboards second Pcie slot may only be running in x4 mode and the first slot running in x16

please help me
 
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Mikkel Yde

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Dec 25, 2013
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okay thanks i will try that

 
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MauveCloud

MauveCloud

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May 7, 2010
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Okay, the ASRock Z77 Pro3 does run the slots at x16 and x4, but based on this page:
http://www.tomshardware.com/reviews/pci-express-scaling-p67-chipset-gaming-performance,2887-10.html
That will hurt your performance, but not as much as indicated by your screenshots.
Also, I noticed that in your screenshots, the benchmark recognizes you're using 1 or 2 hd 7700 series cards.

The other thing that comes to mind is that possibly the cards are throttling themselves to avoid overheating. You could try running GPU-Z to determine if that's happening.
 
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Mikkel Yde

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Dec 25, 2013
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i tried to test if my gpu's are throttling and they did not they dont go over 65* and the do not automatically turn the clock speeds down
 
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MauveCloud

MauveCloud

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May 7, 2010
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Next things to try:
1. Benchmark each card individually in the X16 slot to determine if one of them underperforms on its own.
2. Try some other gpu benchmarks to see if the poor CF scaling you're seeing in Unigine Valley affects them as well.
I presume you already made sure the crossfire bridge is in place and both cards have the pci-e power connector attached, but please tell me the brand and model of PSU you have. This doesn't seem like a weak psu issue, but it would still be a good idea to double-check it.
 
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Mikkel Yde

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Dec 25, 2013
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10,510

so i tested both of the graphics cards and here are the results http://
and the other one https://www.dropbox.com/s/vor2nzmscx7oopr/Capture%204.PNG
so i am quite sure what that the last one is under performing so i think i will try to get a refund or something
 
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