A link to my previous post asking for help.
According to them, they have had more and more reports on the X2 suffering gaming performance on games. The problem can be characterized as either the game slowing down to a halt or speeding up as if it's a speed hack. I personally have experienced mostly the slowing down on multiple games, BF2, Psychonauts, Republic Commando, Dungeon Siege II, with the speed up only noticed in GTA: San Andreas.
Then I find this information linked below on the web where people are more and more complaining about X2 performance with games.
It seems the problem is related to a combination of Cool'n'Quiet or games that have to have their affinity set to use one processor. The actual AMD solution that I got from the tech is the affinity solution. I have C'n'Q disabled on my system and still suffered this problem. Some people claim installing the AMD X2 driver solved their issue, others say it did nothing for them.
I am going to test with a fresh install of windows when I get back home to see if it makes a difference before I RMA the CPU back. But I would like to you bring it to the attention of all the X2 owners out there in case you are experiencing similar issues.
Please post your if you have similar issues or if you have found a workarounds not mentioned here.
Edit: I should add the AMD tech said they've only seen this problem with DirectX 8 games which is clearly not the case.