I don't believe my unit has an L3 cache. The more research I do, it looks like picking up a MDD G4 might be better, plus I'll be able to use DDR memory and the 2GB limit like you mentioned, but I'll also keep my eye out for a Quicksilver dual CPU card with heatsink and if the price is right, I may do that.

Thanks for all the pointers, I'll let you know what happens