No sir. When I first bought my 745, it had an E6600 installed, which has a 1066MHz FSB. The E6600 is a dual core at 2.4 GHz.
http://ark.intel.com/products/27250
The Q6600, it's quad core cousin, is essentially 2 E6600 on the same chip. Operates at the same FSB and core clock, there's simply 2 more cores added.
Let me know if you have any further questions.