I tried to upgrade an Asus AM2 board with nForce chipset to an MSI 785GM-E65 AM3 board so that I could have two 1Gb ethernet ports (one onboard and one on a PCI card), since the nForce only has a 100Mb port. Windows 2000 did not like the other board, however. No matter how much stuff I uninstalled or stripped out of the registry, something kept hanging the service control manager, and then it would spew a nonsense error message "1077 no attempts have been made to start the service" (wtf? I just told you to start it!). In that state, networking was totally broken, and no program that installs its own driver on the fly (eg. CPU-Z) would run.
I eventually gave up on it, but by then I had cloned the HDD to a newer, bigger, and faster one which happens to have similar power consumption rating. The old WD-Green is stamped 0.65A on 5V, and 0.50A on 12V, while the newer WD-Black is stamped 0.68A on 5V, and 0.55A on 12V. The WD-Green also has over 40,000 hours of runtime while the Black is only at 12,000. So I put the newer disk in the original computer with the Asus board. Now a weird thing is happening where Windows wants to run CHKDSK everytime it boots, but it doesn't actually run it because it says it's "not a Windows 2000 disk" 🤣.
I might also drop a faster CPU into the Asus board. Bravedown bilibili downloader started serving 1080x1920 videos again, and now they're using 60fps and HEVC. This is great except that if I want to play portrait format videos on my portrait format monitor, HEVC is too CPU intensive for the Athlon X2 4850e. The problem is that any K10-based CPU I put in is going to run hotter than the K8, especially in a single-power-plane board, because the CPU-NB will start glitching if you lower the voltage too much. And that is bad, because this is a microATX case with a dinky power supply. So I haven't decided yet. I could just re-encode the videos.