My computer is top of the line so no worry about that.
I noticed that with external TV boxes that plug into the back of my monitor the quality is perfect!!! Although its not a capture card, it's just a bunch of hookups.
Here's one I use to have:
Now since you saw that, I'm looking for a internal one plus the tv capture, I wanna make movies and watch tv and play my PS2 on my computer without crappy quality. The card I have now is a ATI TV Wonder the caputer is good and the tuning is good, and plenty of hookup jacks, but the full-screen mode is horrible!!!
Please Help me!!!