Intel Core 2 Duo Processor E6400 (2.13GHz, Socket 775, 2 MB L2 cache, 1066 MHz FSB, Conroe) (Personal Computers)
If you consider that the processor in a non-friendly so overclockable motherboard (Gigabyte G41 Combo) is used, the CPU is running at a FSB of 333Mhz (memory must join) to 2.66 GHz! Not bad, I think!