I got some more memory for my lappy recently to upgrade it from 2 Gb to 4 Gb. Once it was installed, I checked System Monitor, but it said I only had 2.3 Gb (an increase of about 600 Mb, from 1.6). I did some searching around and found out that due to PAE (or something) that 32 bit OS's can only handle up to 3-3.5 Gb, so I took one of the two 2 Gb sticks out and replaced it with the prev. 1 Gb stick, to make 3 Gb. However, System Monitor still says I only have 2.3 Gb. Why?