SLI is supposed to clock down to the lowest clocked card when enabled. but when i enable both my GX2's gpu-z reports them at their stock clocks. evga percision does the same. i need to manually clock the cards if i want them to run at the same speed. does anyone else find this odd? could it be that their are 2 cards per card sorta speak? and that one GX2 doesnt govern the other but rather 1 GPU per card might govern the slave?