4850 ATI Overdrive "Crash"

I have a sapphire 4850. The card works fine on basic clock settings however when i go to ATI overdrive and set the
clock speeds (whatever speed) when i hit apply it will be fine. When i lunch a game though it will crash. It doesn't
blue screen it just becomes black and i have to do a restart. Other info is that it
worked in the past and i reinstalled my drivers to see if that was the issue.


current clock is 625/993

Any ideas would be nice

I had the same problems still haven't found a solution and my GPU temps runs idle at 44C

I just installed the new 8.9 drivers and still get the same problem

i got a palit hd4850... i don't have a game crash but some times the catalyst driver crashes on a bootup and alsoduring normal usage, sometimes some windows have messed up displays...

it only oc'd from 625 to 665 mhz.. it's not thaaaat bad is it??!

Yeah, I have this problem as well. Any ideas would be appreciated. Also, what's the standard settings for the clocks?

Mine also did the black screen thing (as if going into standby but nothing works) during the auto-tune process. It also crashes like that in games...works fine, than black-screen and monitor led flickers as if it is in standby, but only hard-reset will work.