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Overclocking and XFire

paulstung

paulstung

paulstung

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14 Sep 2012
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I have just set up my new HD 7950, in XFire, and everything is hunky dory. But need to now how to go about overclocking, do you do each card or just card 1 ?
I have noticed that in GPU-Z card 1 seems to have more info regarding speeds, and sensor readings. From what it looks like to me card 1 is the primary card, and I just need to adjust that 1 and they will OC together, am I on the right track, or am I missing something.
 
Oc 1 card at a time and find it's most stable limit, remembering to saise the power limit to +20%.

Whatever is the lower limit, use that if you want to keep both gpu's usage the same, or run separate clocks.

If you want to add voltage, you will have to use a tool like AB, Trixx or similar, disable ulps and then repeat as above.

Your second readout has less info as zerocore is probably in effect or there is less readouts on that card.

You should be able to achieve 1100/1350MHz without any voltage.
 
So I need to do each card in it's own right ? I've just noticed in EVGA P X, card 1 has the mem and gpu clock speeds next to the sliders , plus the blue and white bar graph matches the clocks, but card 2 only shows the written clocks by the sliders only, it shows nothing on the graph. Is this normal ?

card 1
rnH2BKJ.png


card 2
fJkbaYI.png
 
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Zerocore is enabled by default and working, in pic 2, the 2nd 7950 is in an 'off state', disable ulps(don't have a clue if it's an option in PX as I have never used it) and you will be able to adjust the settings.

AMD's own CCC should be your first attempt at overclocking though as I imagine you don't know what you are doing and it is relatively simple, move the sliders for each gpu.

Everything you need to know about oc'ing AMD's is in matts thread:

http://forums.overclockers.co.uk/showthread.php?t=18431335
 
It is disabled in Afterburner. but the 2nd card is still showing the same result. Would it be worth removing PX and reinstalling ?

I went ahead and removed and reinstaled PX and all is fine cheers guys
 
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