the stock cooler costs 0$ and offers the same performance. This "heat pipe" technology is a gimmick, did they actually run engineering tests for it or they just slapped on copper pipes and placed a rediculous price tag?
Ok then try to OC a 6600 to 3Ghz on stock and then with the 9700. Compare the temperatures. Of course they do tests on the heatpipes - I have no evidence for this at all, however companies of that scale do not tend to 'slap' things on and hope for them to work...