Ok I just got my 3 stick of 512 in the mail....and i have a 512 stick alreadt in my system...All pc3200..... well...I stuck it in and when i start it up said sumtin about the registry file log copyed or sumtin... well it doesnt I think the diffrent brand is messing up the other 3 stick i mean it works...now just a little funny...of and theres some thing someone had me run before its No chkdsk ...all i know it i went start run and type in somthing and it started checkin my system files...to make sure all was okay...anyone know what that is....i feel so stupid but yeah....ty