>Whichever. I'm in the midst of a fit of trying to unhoard stuff right
>now, so I threw it out--but I kept the controller, because said fit is
>imperfect. Can you even use a PS3 controller with a PC? It looks
>like it just has a standard USB Mini-A port on it. I could look this
>up online, of course, and I presumably will one of these days, but,
>you know, rhetorical musings and all that.
>
>(I don't even need it, I have a perfectly good Xbone controller that
>works for stuff like No Man's Sky. But, you know, can't throw
>something out if it might conceivably be any good! Send help.)

Yes, entirely possible, you just need to download drivers from independent projects to get it to work.

You'll want some combination of either Scp Toolkit or DsHidMini and DS4Windows. There's a number of guides you can search if you actually want to bother with doing this.

(These days, a PS4 controller or newer interfaces nicely with just keeping Steam open.)