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That's normal, the stock cooler is bugged and won't go above 14% speed. But even so you might want to check out an aftermarket cooler as the PCB has the holes in the right places to take older heatsinks which are cheap-ish, like the Accelero S1.
There's a comparison here: http://forums.overclockers.co.uk/showthread.php?t=17890394
Offically yes, only EVGA let you swap a cooler.
That's normal, the stock cooler is bugged and won't go above 14% speed. But even so you might want to check out an aftermarket cooler as the PCB has the holes in the right places to take older heatsinks which are cheap-ish, like the Accelero S1.
There's a comparison here: http://forums.overclockers.co.uk/showthread.php?t=17890394