Ricky, I am not an expert, but I can tell you that I put a 933 mhz chip from a MDD into my 533 DA and have had no problems what so ever. The jumper settings do need to be changed, so check out XLR8yourmac.com for the settings. I would caution you on the purchase with e-bay. While I shop there often, you should carefully review the seller's ratings and ask MANY questions to insure that you are getting what you bid on. Hope this helps. Wade Perry > Can I put a G4 733 mirror dual door cpu into a g4 > 466 digital audio computer > and it work and not blow up the machine. I saw a > few on ebay? I can't > afford to get a upgrade cpu right now with it being > christmas and college. > > > Any advice.. > > > Thanks >