"Most recently, Shuttle introduced the XPC SD11G5 SFF PC that relies on the kind of CPU made expressly for notebooks. The mobile Intel Pentium M processor combines excellent performance characteristics with low power consumption and low heat output. When faced with the noise levels inherent to desktop processor cooling systems, the 479-pin Intel Pentium M makes a perfect low noise alternative for such a compact application as a SFF PC is.

The relatively low clock speeds of Intel Pentium M processors, as compared to Intel desktop chips, can seem substantial if we just look at the numbers; 1.73GHz vs. 3.2GHz doesn't seem like a fair fight now does it? However, even though Pentium M CPUs all run at lower clock speeds than their desktop counterparts, they are just as powerful as top of the line Pentium 4 chips. The reason's simple - Pentium M's do more work per clock cycle than Pentium 4's do. That means a Pentium M processor does not need to clocked as high, to realize identical performance levels."