I have the above PC and was hoping to increase the Ram size from 2gig to 4 gig. I had a fruitless chat with Sony tech support (as usual) and they inform me that 2gig is the max for my machine. The mobo has 4 ram slots 184pin config and at the moment is carrying 4 x 512m memory sticks type PC3200U and was hoping to fit 4x 1gig type PC3200U sticks. Unfortuately the PC takes for ever to boot with 4 x 1gig sticks in. Can anyone advise if this machine is at its max of 2gig or can the BIOS be pursuaded to see 4gig? Hopefully I can workout the new 4 x 1gig sticks config, if not I will have to return them to the supplier. Any help would be greatly appreciated.