yeah, I think it can handle PacMan.

I hope you got a good deal on the system, cuz its a heck of a time to build a s939/AGP system since both of them are on their dying legs.
My system is almost identical to yours, and I'm trying really hard not to put any money into it since it just seems silly to dump cash into s939 and AGP right now. I've loved my system though, you should get a lot of use out of it. I'm still kicking along, and can play any games I want on it. Enjoy it.