Ok, I just bought this ram, and I know 2 gigs is plenty but I want more for future-proofing my machine.

Now I've only got 32bit XP so I don't see the point in getting another 2 gigs if I'm only gonna see 3.5 gigs of it.

So then I thought 'Why not get 2x512Mb sticks?'

But I'm not sure I wanna just go out and buy any old ram cus I know that it has to be the same.... but how much the same?

Can I just get DDR26400 - 800 ram or do I have to get ram with the same timings as well?

Please enlighten me........