Quote Originally Posted by AliG View Post
not at all, if you use the new fixed bios from techpowerup you'll be fine, the issue was due to not all of the bios's cache being detected and half of it not being saved, but that's fixed now so its no big deal if you have the right bios flashing tool (that detects the whole bios) and right bios
This is correct - the problem was that RBE and GPU-Z were only pulling 64k of the 128k bios out of the card, flashing a truncated bios back in caused the cards to not post. No one knew this because all prior ATI cards (including the 4850) have a 64k bios.

I recovered my card from a bad flash (it's rockin' by the way) and then used RBE to mod the 128k bios to include ramped fan control and flashed the newly modded bios back in - it works fine, just like you'd expect.

You can use me as the canary in the mineshaft for the next couple of weeks if you're feeling cautious.