Quote Originally Posted by sabinus
1. Monitor temps with Rivatuner and Atitool in Artifact Tester at each frequency.
2. Provide air-flow on the card's memories. I do it by using a 70 mm fan over a ~55-60 mm GPU radiator (from an Arctic Silencer), thus providing good air on the memory chips.
3. DO NOT volt-mod the memory with the above resistor 437 .. I think it does exactly the opposite: it decreases memory OC. Wipe any pencil trails from it with acetone or technic alcohol.
Leave only the GPU mod. If the GPU OC starts to decrease, it's time to wipe-out the pencil and start over with it.

Good luck!
I monitor the temps all the time, and have added ramsinks on the memmory chips. Also there is a 120mm fan blowing directly on the card. For testing purposes I also added a 90mm 5500rpm fan (the one from a volcano 12, damn, is it loud) but didn't affect the mem clock. The chips were cool to the touch.

As soon as I add volts to the gpu I loose like 100MHz of max mem clock. :/

I tried the r437 pencil mod, and while the mem voltage did go up (from 1.95 to 2.05) I didn't do a thing.

So for now I settled on 580/750 (vgpu raised a bit) for stock cooling...

But I'd really like to hear more about this mem thing...