cbr600

Ok so I cant seem to fix this problem. If its at stock it ideals at 400 core 1200 mem. Now if I overclock at all it drops to 157 core 300 mem and I get flickering on my screens. Anyone got any idea if this is a card problem or bios or something.

Contagion

Its supposed to drop to 157/300 actually.
The screen flickering... I'm not sure what that would be. I would try the latest drivers.
here
http://download2-developer.amd.com/a...vista-win7.zip
Make sure your OC is stable too.

POST 1700

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cbr600

yea I checked it with OCCT its only 900 core 1250 mem so not much. Why does it not drop to those speeds when its at stock settings.

cbr600

ok well at 900core and 1300mem its stable just ran it for 15 min. the temp did hit 83C but I think thats ok right? Any other ideas of why it does this or should I set up a RMA and see if there is a problem with that card.

Contagion

When OC'ing try to keep the temps down below 80C
Preferably 70C

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med1kl

my 5870 crossfire setup flickers too.

Narynan

Its not an issue with the card. Mine does the same thing. Its probally the same for everyones, at least to some degree. When I was running win 7 rc7100 it would always go to 157 / 300 but now with retail win 7 its 400 / 1200.

So I set up 3 profiles in afterburner.
1) standard .... this is what I use when using all 3 monitors of my eyefinity, it stops it from flickering
2) oc'd 1 point on the core, this enables the deep downclocking and is good for when I only am using 1 monitor
3) oc'd 900 1300.