well, you haven't provided many details, neither about your rig, or about what you are planning to do. Just tell us all about it, and maybe we can help. Are you wanting to overclock to 2.2? or buy another P4 @ 2.2Ghz? I believe the voltage for your 2Ghz is about 1.75 volts, but I don't know. We need more specs on your system.