I was able to reach an overclock of +148MHz on the Antigua core and 1607MHz on the 2GB of GDDR5 memory for final clock speeds of 1148/1607MHz on the core and memory. Pretty solid results from a mid-range card. Cooling performance was a mixed bag until you see how the Torx fan-equipped Twin Frozr V cooling solution performs its magic. Equipped with a large S-shaped heat pipe along with the several smaller heat pipes, you get excellent cooling at both stock and overclocked settings, along with a nice noise profile that is dead silent during 2D loads.