Well I can now say I tried all the bios in this post
At least the ones on the first page. I got a higher voltage on few of them. All of them where unstable, except one msi bios u posted after the first post. Its voltage was 1.164v. I can get 875 mhz stable with this bios
Also when I tried to flash the Sapphire bios (vapor-x) I bricked the card. I tried to reflash blindly, and I measure the time needed for the pen drive to boot, double it in waiting but it wouldn't work. The motherboard didn't wanted to boot with the card not giving output to a proper display. Luckily I have another card, which I always remove before this tests, and was able to flash back the msi bios with both cards in.
So in conclusion, if you are going to be flashing all sorts and flavours of bios onto your gpu, be sure to have an extra card at hand just in case
My second card is a non-ref Sapphire 5850. It runs pretty stable with stock bios and voltage at 954
It run almost stable at 975. But after an hour voltage dropped from 1.088 to 1 and windows stated the drivers failed. I'm assuming that 1.088 wasn't enough for this clock and it dropped because the card actually wanted more. Or it is just my imagination?
My cards PN is 288-5e140-030sa; would it be safe to go flashing other bios on this card? or as safe as it was flashing to the xfx?
I really wouldn't mind the stock bios if I could just oc the values above in linux. But that's not possible because there is no such tool as afterburner or trixx for linux. And ati's tools only let me go up to 775, which sucks hard compared to what I got in windows. If there is a way unlock current bios clocks i would be delighted to hear
Thanks in advance for any info