ok ok, i seem to remember some of this. been a while since i dealt with ram that needed pairs.

jist of it is he has to upgrade equally correct? cant have 2 128's and 2 256's ? all has to be equal?

(if thats really sayin what im tryin to say. heh)

RAMBUS RAM is a pain in the arse. If you need to upgrade it, you not only need stuff that's the same type, you need it from the same batch. So if you're gonna upgrade to 512 MB, you'll either need another stick of 256 from the same batch (ain't gonna happen), or you're gonna have to buy a whole new RIMM.

It's problems like this that make me hate RAMBUS, even though it delivers higher performance than DDR. Yeah, you'll get the highest performance with 1066 RAMBUS and an Intel 850i chipset, but the sheer pain in the arseness of RAMBUS means I would never ever use it.

A nice Athlon 2600 and DDR would give you equivalant performance, except in apps which are very dependant on memory bandwidth.

And to anyone else tempted to use RAMBUS; don't, if you value your sanity. Go grab an nForce 2 motherboard and make use of the dual-channel DDR that this chipset supports.