The gang over at LegitReviews attempts to answer the question of whether it's actually worth buying a budget graphics card to put in your budget system, or whether going with on-board video is a worthy solution. They don't test the cream of the crop on-board graphics, but their numbers do give you an idea of which way to go...

"A quick trip to your local Wal-Mart’s electronics isle will put things into perspective for many as the shelves are lined with GeForce 6200TC video cards. With the bulk of America shopping at Wal-Mart on a weekly basis I feel it is time we stop and take a look at something everyone can buy."