Hi. I just installed an additional 512mb of pc133 ram from pny technologies into my system, giving my system what i hoped to be a total of 640mb or ram. But instead i've only got 384mb. on pcpitstop.com they've said that my memory slots are good for only 256mb.. and someone else has told me that the new memory i have is double sided and some systems won't run double sided ram. is there a way to switch either my slot specs from 256 to 512 or to change that fact that it won't accept what looks to be double sided ram? if anyone has an answer it would be hugely appreciated.