PowerColor R9 270X 2GB Devil Edition Video Card Review @HiTech Legion
 

PowerColor's Radeon R9 270X cooling solution has four heatpipes, a large aluminum fin cooling surface, aluminum shroud, and aluminum backplate. The cooling features, along with the multi-phase Digital PWM, allow for the boost speed of the GPU core to be factory overclocked to 1180MHZ, 130MHz above reference speeds.

http://www.hitechlegion.com/reviews/...17-pc-270x-dev