While they may be seriously overclocked the chips themselves remain very stable even with the stock cooler they labour under. The results are very impressive though, posting the fastest out-of-the-box results of all the factory overclocked versions of the GTX 460 we've found.
The stock cooler is capable of keeping the card running at this speed, but that doesn't mean that it runs cool…
DirectX 11 Tessellation Performance
DirectX 11 Gaming Performance
DirectX 10 Gaming Performance