Vmod 3850 through BIOS apparently IS possible....

[Blacklash]

I've tried a couple of the BIOS in this thread and they all break overdrive.

Flashing is easy. I don't have a floppy so I went an alternate route. I created a boot DVD with Nero. I set my DVD as the first boot device. When I post with the DVD in the drive the system goes right to Dr. Dos. I've got Atiflash on my C drive with all the BIOS I like to play with. Then I just go to C and atiflash -p -f <adapter number> <bios name>.rom. Reboot. Works like a charm. Make darn sure you remove your driver before doing this. I get both cards with no issues. I have 3850 crossfire. I do the one at 1 first then 0, reboot.

I wish I could get my hands on a BIOS that upped voltage and did not break OD.