My highest Win XP 32bit ...

*Phenom 9950 BE (JAAHB AA 0828BPMW)
*2x OCZ Reaper HPC DDR2 1066mhz
*HD HIS 4850 800mhz core 1.3v /1025 mem
*GigaByte GA-MA790GP-DS4H /SB750.
*H20 220 Apogee Kit

http://valid.x86-secret.com/show_oc.php?id=417703