Pentium IV is great stuff. I have a handful of old CPUs sitting around.
Intel Celeron e3300
Intel Pentium e2160
Intel Core 2 Duo E6300
Intel Core 2 Quad Q6600
Intel Core 2 Extreme
And oddly enough an ASUS Nvidia GeForce 5200 128MB video card
Yeah that Machine is rock solid. It's from a time when Dell made bulletproof machines. All theses years the only issue it ever had was a failing hard drive that I was able to copy before it totally died.