What to do? i got 6 shapphire nitros 480s orderd . Better get 480 ref cards and some coolers and wait for modded rom for them instead of the nitros?
Keep your nitros and wait, 8pin and nice double fans are worth the money.
Have never needed to do that, but yup, if you have onboard vga, or another GPU, you can still easily flash your badly flashed or bricked card. (If it gets detected though :p)
Well, i had to do this once or twice, always got replacement or refund.
Two words about the BIOS: wunderbar job
When you are done with power measurements, could you check if risers doesn't catch fire in dual mining?
Or did you inserted card directly into motherboard slot?