I'd say you've got a heat problem with your graphics card. Unless you've got your HSF installed wrong on the processor, its definately not your processor. I have a machine here with the same processor and it plays COH/COV just fine. Just for a test, try opening up the side of the case and log into COH. Watch the CPU and Graphics (if the graphics card has one) fans. See if they are running clean (no dust) and full speed. Wouldn't be a bad idea at all to take some compressed air and blow them out. Make sure you have the most current drivers too. Cryptic Studios is using a more advanced graphics engine for COV and they are incorporating that same engine to COH. Problem is, there is tons of lag and instability during this process. Additionally, it has been noted in the forums that they are having tons of issues currently with ATI cards. Expansion 7 is supposed to address many of these issues.