I haven't had the time to replace the battery yet but everytime I don't use the PC for a while and then turn it back on, it has some weird date. So, I'm definitely going to change the battery. I was getting sidetracked trying to remember the settings I made in the BIOS but I think I'll stick with the auto settings. My memory is DDR2 667 Mhz. I think I had CPU at 333 Mhz and FSB at 1333 Mhz. I don't remember wheter I had CAS latency set either. I'm not a real power user anyway so I guess auto is good enough. As I was going over this, I wondered why do I have to write down the BIOS settings because I'm changing the battery? Seems to me if the date and time are not keeping, then any other settings must have reverted to the factory defaults. Am I right? I know this seems like a simple question but I've read articles which say you must write down whats in the BIOS because when you take the battery out it will lose the settings. I don't know if I agree with that. In my case, the battery is no longer keeping the date and time and it seems like the other settings changed also. So, why the need to record the settings?