OC Causing Gfx corruption.

[Assasin-uk]

Out of the blue my 3.4 @ 4.0 northwood had started causing gfx corruption..as per my thread:
http://www.xtremesystems.org/forums/showthread.php?s=&postid=449469#post449469

Seems strange why this has happend now out of the blue, and ive changed nothing hardware or software wise..

Anyways my specs

3.4 at 4.0 236fsb
1.625 vcore
Abit ic7 max 3
ocz4400@ 3.0v (timeings by spd) not had time to mess with them yet

Seems odd as this machine folds all day long and never crashes...
But after a few mins in a game corruption is rife (see previous thread)

Its deffo an oc thing as now im back at stock speed theres no corruption...

Any thoughts on what i need to change on the oc front to sort the corruption..?

Plent of cooling in there btw... Tiger one on the N/B , vapo on the cpu , and Zalman on the GFX..

[saaya]

those are gpu artifacts i think, seen them as well when going to high gpu wise. , check if the zalman is making good contact.

hmm the second shot looks more like memory artifacts... maybe the zalman damaged the core when you mounted it so now it doesnt oc as good anymore? hmmm

bfv is known to have issues with ati cards with aa and af... your not using aa and af right?

[Assasin-uk]

No AA and AF are off m8..

I put the zalman on because the corruption was there in the 1st place..

And it aint overclocked at all..

[computerpro3]

CHeck your psu. I have had low voltage lines cause artifacts at previously stable speeds when highly overclocked. For example, when I had my antec truepower 430 when I was at 4ghz, I could only go to 420/350. When I was at 3ghz, 440/370. Now I got my pc power and cooling 510 deluxe, I get 4ghz and the nice card clocks.

what psu do you have?

[lalPOOO]

I know this isn't really related to your problem, but why are you running pc4400@3v at what I'm assuming is 236mhz?