Good question. In Ntune, on the motherboard page, there is a slider that has 2.5Ghz on one end and 5Ghz on the other. Incidently, the bus link identified in Everest, GPUZ or 3dMark, states PCIE1.0x16.
So I am wondering why would a 2.0 card on a 2.0 board run at the 1.0 clock speed and identify as a1.0 bus link. Does this make sense?
Update the BIOS, NB chipset driver. I guess it would solve it.
Or, you running a 1.0 16x GPU, and he detects the speed hes running atm. The latter is my best bet.