Hello Peeps, I am not new to this forum but somehow forgot my username and passwords so I am using this new one. I have a question. I have a comp that has two memory slot that is capable of running up to 512mb of RAM. i had 128mb in there and just bought 256mb to add to it. When i turn on my comp i see the speed difference but when i check out my system info, i see that only 256mb out of the supposingly 384mb of total ram are being use. i tried restarting and starting in diagnostic mode but it detect no error. It is a PC100/133 SDRRAM. Please help.