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AMD 6850 CF not working

Last response: in Overclocking
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January 1, 2011 8:04:04 AM

Hey im new to the forums and I have a question about why isn't my gpu's not working properly in crossfire mode.
I have a HIS 6850 and a Gigabyte 6850 with a factory oc. I upped the HIS gpu clock to 850mhz and downclocked the Gigabyte memory clock to 1000mhz (getting artifacts with my HIS gpu if I oc'ed the mem clock)

But when I crossfire them I do not see any gains from crossfiring and I tried both 10.12 and 10.10e in crysis, arma2, and bfbc2


My computer specs are
Asrock 870 extreme mobo
athlon 2 x4 3.33ghz
x2 6850
antec earthwatt 650psu

any help will be appreciated

More about : amd 6850 working

January 1, 2011 10:11:34 AM

You must enable crossfire with the ATI catalyst program. Right click your desktop, and you should see it. There's a crossfire tab in there you can use to enable crossfire.
Hope this helps.
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January 1, 2011 1:45:57 PM

Yeah I already did that and enabled the crossfire watermark to show up when crossfire is working and still no gain in performance. I know both of them are working i switched them and ran both of them alone and same fps for both cards so i dont have a faulty card that i know of
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