HD trouble with Win2000

[mhan80]

I just reformated my computer, to reinstall win2000. Howwever, before I formated my computer when i first start my computer in the bios information it showed my Hard drive as 40 gig LBA and ata 100. Now the bios does not show that my HD is ata 100. How so I know if my hd is currently running at ata 100. Also now when it chaecks teh ram it checks all 256mb and then goes in circle and rechecks how do i stop this. It did not do this before