Intel Core 2 Extreme QX6850: Four Cores at Three Gigahertz
 

To hit new performance heights the quad-core Intel processor for computer enthusiasts uses 1333MHz bus and operates at 3.0GHz speed. However, what is really interesting about it, is the new G0 processor stepping lowering the heat dissipation and improving the chip’s overclocking potential.

http://www.xbitlabs.com/articles/cpu...me-qx6850.html