When gaming with a sub-$100 video card, we really can't expect to be able to run AA. The HD 4670 does of course have AA filters, but I just don't expect a lot out of a card at this price. Maybe I'll be surprised.
Crysis: Crysis requires a strong system with a good video card to give any kind of decent playability. I decided to try running AA with Crysis just to see how the HD 4670 performs, I already know that the 8600GT doesn't do well with AA. Settings were: Medium, 2 x AA, GPU benchmark, 64=bit, DX10, 1680 x 1050.
Not bad, the game was playable with the HD 4670. I ran the game again with no AA.
The HD 4670 did very well with no AA, no stuttering at all.
PT Boats: Knights of the Sea: PT boats is a water-based game with excellent graphics, especially when running AA. I used the standalone demo benchmark, settings were: Medium, 2 x AA, 1680 x 1050.
Though it did struggle some with the difficult camera angle changes in the video, the HD 3670 did ok. Running the test without AA, the 4670 got 33.1 FPS.
Supreme Commander: I thought I'd try the HD 4670 with a DX9 game, and chose SupCom, an RTS that is more CPU and memory intensive than GPU. But using AA will cause a lesser video card to struggle. I used the onboard performance test, setting were: High, 2 x AA, 1680 x 1050.