That would be how the CAP app sets the hardware settings in the user inerface of the Catalyst Control Center. You see the card acks like one GPU not two, since it is internal CFX not external with the bridge. Another setting you can use is Force max defualt clock, you can find it in the task bar icon under 3D settings below open GL menu. If you do make sure you have good cooling that will cause the card to heat up and slow your frame rates. Yet your PSU is not helping. If in doubt, I will suggest that you contact ASUS tech support.