I have almost the same setup as Ackmed, but I've had numerous problems with my rig. I am overclocking, but it's Prime stable, so I didn't think that was my problem.
Basically, for a while I had problems with HQ AF and the CCC AA not being forced, so BF2 and HL2 looked like crap, and nothing I did would make AA turn on. It was unpredictable, sometimes it would work, and sometimes not. I still haven't figured out what is affecting it, but I reformatted and installed only what I need to run BF2 and Steam, including 6.5 Catalysts, and I keep setting restore points, and backing up my registry whenever I've made major changes, and the driver AA/AF works. I have had to restore the registry several times when the settings stopped working, and it works currently. However, I've been having incessant crashing which never happened before, especially in BF2 and HL2 Episode 1. Windows error reporting came up with a web page saying they were clueless about the crashing, but it was possibly an "unknown driver", which means they didnt' know which driver but one of mine was probably causing the problems. I hope its all driver/windows problems, because performance and IQ are amazing with this setup, but its a ROYAL PITA to keep having these problems and have no clue as to what's causing them.