Yeah, that is right. The 700mhz does run on 66mhz bus. That is the only reason why I was asking because I didn't know if it would work with the 100mhz bus speed. I hope that it does work because that will definetely make that computer nice. To go from 128mb PC133 to 512mb PC133. Then from 1mb built-in gpx to an ATI Radeon 7000 64mb DDR. Those are already done. Then from a 700mhz Celly to a 1.3ghz Celly. That will be a good upgrade.