I've been in touch with MSI tech support. They gave me a new BIOS version to try but i'm having the same issue. The new BIOS they gave me also sets the default vgpu to 1.164, resulting in instant loss of video when i launch a 3D app. Hopefully they'll keep working at it.

I'm starting to wonder if i just got a bum gpu, but having read every page of the official 58xx owners thread, and no one else having any problems setting whatever voltage they want, i have to wonder if thats the case. Especially since i've seen multiple users complaining of signal loss at the exact same voltage on this model.

Hopefully they'll release a BIOS fix that'll take care of this problem, unless it really is just down to a sh*t gpu.

Anyway, in the meantime i had an idea. I know flashing a reference BIOS to this card would be a bad idea since it uses a different voltage regulator and has a different layout, but, what if i flashed a BIOS of a non reference card that uses the same vreg??? This card uses the uP6266 vreg, so does the MSI 5870 Lightning and the 5870 Twin Frozr II. So what are the chances of causing damage to the card by flashing the Lightning BIOS to it? I've seen alot of people flashing reference 5850s with reference 5870 BIOSs, so i'm assuming since the vreg is the same it should work right?

I know i can throw in my old vid card and reflash if it bricks, but i'm concerned about causing damage to the actual hardware since they aren't reference. Anyone know if it's possible?