Quote Originally Posted by Factotum View Post
I moded Sapphire HD4850 bios:
1. Upper limit GPU set to 950MHz
2. moded powerplay: in 3D set 1.158=1.21V (monitoring) - it's max value for Vgpu in bios. If value more than 1.158 - overprotection kick voltage to 1.1V in monitoring
3. fix a bios checksum. original bios
get it here or here
My bios work great with Catalist 8.7 in Windows XP and Vista x64, and don't work with catalist 8.8beta
Enjoy
This works GREAT for my gigabyte 4850! I could only get 750mhz ATiTool stable /w Accelero S1 though

Is that normal for this voltage and high end air? It full loads at only 46C.