Topic Title: Screen flickers when overclocking HD 6850
Topic Summary: Need help fixing the flickering
Created On: 03/14/2013 04:00 PM
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 03/14/2013 04:00 PM
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EliasAffe
Peon

Posts: 2
Joined: 03/14/2013

I got dual 6850's in crossfire, i decided to overclock and when i did my screen started to flicker.
I reset the frequencies thinking it was to highly overclocked but it even flickers when i overclock by 1Mhz.
Some people said ccc was the problem so i deleted ccc and all of its drivers and overclocked the cards with MSI afterburner.
Flickering stopped but when i play games the screen randomly freezes and i have force shutdown the pc.
I then installed ccc again but tried a previous version of it, i tried everything from 12.4-12.9 and it still didnt work.
ccc only allows me to oc to 850mhz, default is at 775.
Some say that the problem is that i overclock with other programs more than ccc allows, but is it possible to enable higher overclocking on ccc and voltage control? (i cant access voltage control on ccc)

My current version of ccc is 13.1, im running windows 7 ultimate 64bit.
Specs of my pc are, i5 2500, 3.3ghz
SSD: intel 550 series 120gb
HDD: seagate barracuda 2tb, 7200rpm
16gb corsaie vengeance ram
2x sapphire HD 6850 in crossfire
Ga-p67a-d3-b3 motherboard with newest BIOs.
Sorry if i forgot anything, if i did ask away
PSU: ocz 750W cz 80+ bronze 



Edited: 03/14/2013 at 05:35 PM by EliasAffe
 03/14/2013 07:01 PM
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zipsi
Elite

Posts: 1004
Joined: 11/22/2010

Use MSI Afterburner to overclock, it lets you overclock all crossfired gpu's at the same time. Flickering and other issues will occur if they arent running on the same clocks.



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 03/14/2013 07:50 PM
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EliasAffe
Peon

Posts: 2
Joined: 03/14/2013

''Some people said ccc was the problem so i deleted ccc and all of its drivers and overclocked the cards with MSI afterburner.
Flickering stopped but when i play games the screen randomly freezes and i have to force shutdown the pc.''

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