PowerColor is one of the first board partners to release an overclocked, custom designed HD 4890. Instead of the AMD reference cooler a solution from Zerotherm is used. The clock speeds have also been bumped to 950 MHz core and 1100 MHz memory. Due to their improved PCB, PowerColor has managed to position their HD 4890 PCS at the price that normal reference cards go for: $249.

http://www.techpowerup.com/reviews/P...or/HD_4890_PCS