My Gigabyte 7950 is the three fan one with I believe a locked voltage, will flashing the bios still help? No one told me how important System RAM was, I couldnt get thread concurrency over 10k with 2gigs, put a 4gig stick in and I am at 21712 and now I get no HW errors which is great. But card still runs at 84 degrees to pull around 600 K/hash, probably cause of the voltage and I still cannot change the memclock without the card crashing, maybe I have to overclock it in MSI, catalyst worked I think but when I put those same overclock settings (and even without) in CGminer, soon as I launched it the card froze up and I had to reboot.