Artifacts after gpu oc

[Ticonderoga]

I have been running my HD7950 just above the 1 ghz mark for a while now and yesterday I noticed some artifacts in BF3 (black lines comming out of peole).
I quit the game, rebooted and ran of couple of loops in Unigine Heave = no artifacts?
So is it because my card cannot go any further or does it simply need more voltage to be stable? And are the artifacts caused by the oc on the core or on the mem?
ASIC is 89.1% on this card.

Cheers

 

[Chrisoldinho]

Hard to tell where it's coming from, but if I had a gut feeling I would go with the memory, try lowering by 25-50Mhz and retry

 

[psychodil]

Give it a little more voltage if you have the temperature headroom. Seems to make the memory overclock more stable too

 

[chief barker]

I have those graphical anomalies in BF3 if i overclock my VRAM too high on my 7970's.

They look like long black triangular spikes.

It's definately the V-ram try lowering it.

 

[Ticonderoga]

Thanks, I will try lowering the mem oc. It seems like a have a strong core, I can easily go up to 1100-1150 mhz on the core but the mem won't go past 1450 mhz (at least not stable anyway)

 

[Marine-RX179]

The artifacts that caused by core clock overclocked too high are usually numerious (green) dots appear on the screen, where as "tearings" (which looks like lines coming out of things) are usually caused memory clock overclocked too high.

 

[Ticonderoga]

The artifacts that caused by core clock overclocked too high are usually numerious (green) dots appear on the screen, where as "tearings" (which looks like lines coming out of things) are usually caused memory clock overclocked too high.

Then it is def. the memory, too bad my memory won't go very high. Hope it won't affect the performance too much.
I also had my screen go grey and lock up, but that seemed like a core issue.

 

[Marine-RX179]

Then it is def. the memory, too bad my memory won't go very high. Hope it won't affect the performance too much.
I also had my screen go grey and lock up, but that seemed like a core issue.

Grey and lock up points to unstable overclock, which should can be sorted either by upping voltage, or lowering the clock speed.

I would suggest you to may be leave memory clock at stock first and see how far up can your core clock goes first, then play with memory clock after that.

 

[Mal X]

i get black lines in the shadows/ the shadows under weapons on the ground flickering, and flickering on the screen whilst turning or running fast...... mine is on max AMD Catalyst only, no voltage change... worst of all was yesterday

i dont think it's major because Deux ex is ok...... it's more like an old game that just doesn't work well with AMD, or at least i hope so