I'm about to upgrade and been looking up on memory about. I already know of PC100, PC133 SDRAM but whats this other type of memory e.g. DDR2100??Is the DDR memory better at handling more data, and is it better than the SDRAM?CheersWill

SDRAM is old now, DDR (Double data rate) is what to go for. Comes in various types... 2100, 2500, 2700 and probably more. Forget SDRAMhttp://www.avsim.com/vfr_center/avsim_sig.jpg

However, I believe that you need to have DDR compliant mobo.Correct me if I am wrong.Cheers!Richard

Correct- a mobo made for DDR. Bruce.