3 gigabytes.
I am assuming that your hardware is compatible.
The only time that I had a problem installing 2000 was when one of my portable hard drives went bad, I did not get a turquoise screen...the installation just kept freezing up at the same point in the installation.
I replaced the hard drive and was able to install.
btw: I didn't even have any bad sectors on the partition that I was trying to install to, yet, it wouldn't install.
Good luck.