PCMark can be used on desktop PC's, Laptops and 
even Workstations and tests everyday computing from home to office usage. PCMark 
specifically stresses the CPU, memory subsystem, graphics subsystem, hard 
drives, WindowsXP GUI (if WinXP is used), video performance and even laptop 
batteries.
It's interesting to see that both the AMD and P4 systems score 
about the same in PCMark2002.
PCMark04 is the latest version of the popular 
PCMark series. PCMark04 is an application-based benchmark and a premium tool for 
measuring overall PC performance. It uses portions of real applications instead 
of including very large applications or using specifically created code. This 
allows PCMark04 to be a smaller installation as well as to report very accurate 
results.