Overclocking and Noise
Overclocking
Overclocking the Gainward was a simple and unexciting affair. ExpertTool lets you set the following factory approved clock frequencies, to get you a bit more speed.
15% on the core and 11% on the memory will give you a decent performance boost, especially if you're using anti-aliasing or anisotropic filtering, or if you're running DX9 apps that are hitting the underwhelming shader units hard.
Overclocking past those clocks didn't reveal much extra overclocking headroom. 468/798 was the maximum stable set of clocks that would make it through a couple of loops of 3DMark03. Your mileage will vary of course, but they're decent clocks given results from other 5900XT reviews around the intarweb.