The
front-side bus (FSB) of CPUs that install in Socket P can run at 400, 533, 667, 800, or 1066
MT/s. By adapting the multiplier the frequency of the CPU can throttle up or down to save power, given that all Socket P CPUs support
EIST, except for Celeron that do not support
EIST. Socket P has 478 pins, but is not pin-compatible with
Socket 479 and
Socket M (by the location of one pin) and is electrically incompatible with
Socket 478. Socket P is also known as a 478-pin Micro-FCPGA or
μFCPGA-478. On the plastic grid is printed as
mPGA478MN. ==See also==