If it’s really early 2000s, you might want to put it on eBay. There are retro gamers out there that could use it as good Windows 9x era gaming PC. You could give that HW a new life in someone’s retro setup.

It’s great HW for occasional gaming, but it’s very inefficient for 24/7 operation. You want to be somewhere after 2015-ish for something that is supposed to run constantly.