Quote from: phzi on June 13, 2014, 09:03:07 PM

GPU_MAX_ALLOC_PERCENT is an environment variable, not a registry key...

http://windows7themes.net/en-us/how-to-change-environment-variables-in-windows-7/

Tried this, made no difference. I've tried PiMP, no difference.

Some good news however... I've managed to get my cards hashing back at the same clocks with nearly the same hashrate. I did this by removing my undervolting.

Anyone have any ideas on how this miner could've messed up the voltage on my cards? or if you can think of anything else that could have done it?

I'm going to leave them hashing away like this for now, try and get it working stable. Then I'll tackle my undervolt again. It has been working for over 6 months perfectly fine before I used this (so it's not an unstable undervolt), very strange.

Just a quick update for anyone that is interested/has any ideas. Thanks for all the suggestions so far guys, much appreciated