RAM for my desktop.

According to Crucial memory.com my computer can hold up to 4096MB of RAM, which is a massive amount. I only have 256 at the minute and would like to add some, Crucial.com do a 512 DDR PC3200 for £50.51 inc. VAT. They do say that these need to be installed in pairs, therefoe going by this I would need to buy 2. (Even though my desktop only has one module of 256).

I also came across this on ebay, that seems very good - eBAY

Can anyone recommend cheap places that I can buy more RAM from, I would like to add an additional 512mb which would quicken up my computer.


Thanks