Power, Temperature and Noise
There's a small energy price to pay for higher clocks, of course, and Palit's card, evaluated as a system, uses an extra 16W over the reference. The figure is still well below the Radeon R7 260X and GeForce GTX 660s GPUs.
The basic Palit cooler also has no problem in keeping the 60W Maxwell chip cool.
Guess what. It's also very quiet. Bet that one caught you off-guard.