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).