Hmm. Now my memory might be being a bit flaky with Windows 98 vs Windows XP (which was run on a Pentium 4 and that one surely had a onboard GPU on the motherboard), but I remember for sure that if there was a listing in the screensavers dialogue for it, it worked (because I don’t remember any one of that not working).

I do remember seeing the message about voodoo not being available, when I tried to install Desert Storm from a CD, so it definitely didn’t have that (the computer was handed down and I was a kid and didn’t open and see it).

On a Pentium 2 without Voodoo, both would be software

Yeah, I remember a few of the Win98 ones.

Which one would be harder on the old processors though? Pipes, or the one in which it put a moving magnifying glass or bubbles on an image of the current desktop?

screensaver

Definitely won’t be a CPU saver though