Shuttle has created the KPC around an Intel based 945GC motherboard with a Celeron 430 CPU clocking in at 1.8 GHz. Upgrading the CPU is certainly a viable option, as this board supports most Core 2 single and dual core CPUs, from Celerons to the newest E8000 series using a 1333 MHz bus. A CPU upgrade would certainly give the KPC a very wide range of uses without having to worry about limited processing power, so in this respect, Shuttle has certainly delivered on their promise that the KPC is an expandable system.