Twin Frozr 4, Add-in capacitor-mod pcb, 14-phase core digi VRM, Unlocked clocks, unlocked core voltage, vddci, aux, mem voltage, relaxed OCP, ready for Ln2, voltage measurement points, +180% Powertune, 250/450W TDP! Holy cow.
Con: Price - $620
Hardware Heaven Radeon 7970...