Here's some info. I can't link to the bios directly, but if you google around, it's easy enough to find. It's a 1000w kingpin bios.
My card is launch FTW3 Ultra. Power seems to report correctly with this bios. Look at the clocks... they're rock solid. Card is pulling 500w at 50% power target. I've tested a little bit higher as well, and it does scale, but I'm on air, so 50% is fine. I am pretty worried about PCIE slot power though, that's almost at 100w and way above spec.