Hi All, In case you're one of the ones looking for CPU upgrades for your MDD. GigaDesigns has on their web site a dual CPU upgrade card for MDD's. Curiously, it is a 1.3GHz unit using the 7455b chip, with L3 cache. I have on order (supposed to ship Wed) a dual 1.8GHz for my QS, but now I want to know if a dual 1.8GHz 7455b chipped upgrade card is possible or in the works for the QS and later for the MDD. OR, is it a trade off between 1.8GHZ 7447 chips and a 1.3GHz 7455b. Anyone know? STeve