Sorry to thread jack again guys, but this review here has an nVidia GTX 480 running the "Heaven 2.0" Benchmark. It is running on an ASUS ASUS P6T Deluxe V2 and is suffering from the PCI-E Gen 2.0 bug. (as you can quite clearly see on the screenshots the card IS running in Gen 1.1 mode.) This is not a power saving feature.
Hopefully a more recent BIOS update for the ASUS P6T Deluxe V2 will resolve this bug.
John