So, what were the XP minimum requirements? Microsoft says atlest 233 MHz processor, 128 Megs of RAM, 1.5 Gig of space. These guys seem to disapprove the official minimum requirements. XP Pro was made to run on a downclocked Pentium OverDrive from 83 MHz to 8 MHz and 20 MB RAM. 30 minutes of boot process with 100% CPU usage all the way, Ouch!!