Sapphire HD 7770 OC Series clocked at 1150MHz

Total of four cards, all custom

 

Roundup: Decent but expensive mainstream series

Single 12V rail, modular and up to 1000W

Affordable 7-incher with ICS

Three months late Sandy Bridge-E CPU

Fits between HD 6850 and HD 6870

When it comes March-June 2013

Up to 4.2GHz, 384 Radeon Cores 2.0 at 100W TDP

Radeon HD 7970 Dual Fan