In 2k & XP the Windows Task Manager has tow tabs showing how much memory is in use: the Processes and Performance tabs.

How come the number shown in PF Usage portion of the Performance tab is always greater than the sum of the Mem Usage column from the Processes tab? My Processes (at the moment) add up to about 510MB, and Performance lists 819-820 MB? I would think these two would tie out. What am I missing?

-Zeke