my 6950 flashed fine to 6970 bios and runs 24/7 at 1000core 1500mem at 1.3v..maybe more in the core clock but havent tried over 1000 yet just enjoying it :) before i could bench 950core at stock volts however wouldnt last in black ops for more then 15-20 mins.
i might give 1050 a go and see if i can push out a vantage or something
EDIT: didnt quite reach 1050mhz core but did manage 1035mhz core and 1525mem on 1.3 volt air cooled(silently) pulled 6331 on 3dmark11 not to shabby for $235
and im sure 1050+ on a little bit more voltage but idk if i wanna go through that or not yet..maybe at a later date. Ran 1040-1045core through 3 of the gpu tests before crashing so i think 1.325v would do.
http://i285.photobucket.com/albums/l...g?t=1301451202