I got a Performa 630 DOS and yeah there's space for a TV card, AV card and an ethernet comm slot card if one wanted it. I know since I have all them installed apart from the comm slot card which I actually bought a v2 one by accident. One thing I would be aware of is noisey PSU's. I got another 630 mostly for a new (old) PSU but turns out this has the same freakin' problem. >