Intel Q9400S & Intel Q8200S: 65W Quad-Cores
 

The benefits of a low-TDP processor are obvious, but a usual downside is also obvious: low clock speeds. Intel's changing that thinking with their Core 2 Quad "S" series, which includes the Q9550S, Q9400S and also the Q8200S. Compared to their non-"S" variants, they draw less power and run cooler, all while retaining the performance they've become known for.

http://techgage.com/article/q9400s_q...5w_quad-cores/