Having found some bargain RAM earlier I ordered 4 x 1GB sticks to replace my failing 4x512MB sticks - the extra 2GB not really needed yet though. However following some googling it seems... 32bit XP SP2 cant use more than 3GB RAM Installing 4GB RAM on my board may actually be slower than 2GB RAM?? You can use the spare 1GB RAM as a faster page file? Anyone shed any light in these? Will try and cancel the order but it may be too late.