there doesn't exist a p3 with 400mhz. the slowest is a p3 450.
since you are using a 440bx mobo which doesn't support 133mhz fsb officially the cpu is wrong recongized. your cpu actually seems to be a p3 533 coppermine slot1
http://www.hwbot.org/quickSearch.do?hardwareId=CPU_1434
it's that category.
http://www.hwbot.org/hardware/processor/xeon_3.8ghz_prescott
it would be nice if you can report those wrong entries there, so they can be moved to the right category.