Radeon HD 7770 DirectCU
Card has an overclocked default clocks to 1020 MHz for core and 4600 MHz for memory. It features 1GB of GDDR5 memory on 128-bit bus. Cooling system was equipped with a 75nm fan with an aluminum radiator connected to two nickel-plated heatpipes. According to ASUS this construction can increase temperature dissipation up to 20%. Card has four outputs, one DVI, one HDMI and two miniDisplayPorts. Radeon HD 7770 required additional 6-pin power connector.
Radeon HD 7750 DirectCU
Card features overclocked settings to 820 MHz for core and 4600 MHz for memory. Based on Cape Verte Pro features 1GB of GDDR5 memory on 128-bit interface (just like HD7770). Double-sealed 75nm fan blocks large amount of dust.
Both cards can be easily overclocked by ASUS GPU Tweak, where it it possible to choose between 2D/3D modes, flash new BIOS and install latest drivers.