I know why. The heat dissipation system won't fit in a Cube. Hopefully Sonnet and PowerLogix are also working on this for us. Or maybe OWC is working on an alternative design that will fit later. We can always dream. k On Sunday, May 18, 2003, at 05:21 PM, Michael Blossom wrote: > OWC has released a new upgrade card: > > OWC Mercury Extreme G4/1.3-1.33GHz Processor Upgrade w/2MB DDR L3 Cache > <http://eshop.macsales.com/ > Item_MailList.cfm?ID=5807&Item=OWCME41330L2D> > > Unfortunately, it doesn't appear to be Cube-compatible. Anyone know > why?