When I got the PL 800MHz upgrade for my cube I could not get the level3 cache to kick in at first... The speed was not that much faster then my 500MHz cube with L3. After some really nice support mails fron the super nice PL guys the L3 kicked in and I got a lot more speed from it! It was a major difference no doubt about it! Petter -For me Apple is Jihad Arturo is in da house! >> So how important is L3 cache anyway? >> Looks to me its only a 2-3% speed advantage?! >> Maybe for DV and 3D but is it necessary for 2D photoshop work? >> >You can judge a little by the new 12" Powerbook. It has no L3 and >is comparable to 1GHz with. The difference is that it has very fast >memory. On our cubes, with relatively slow memory the difference should >be much more significant.