I've been having big problems with Half Life 2 recently, I've done everything (reinstall DirectX, Omega Drivers, Catalyst...) but reset my X1600 back to its original speed since I overclocked it a while ago. I'm almost certain it's overheating. Does anyone here know what they are? Or perhaps for awesome folk who haven't overclocked, download AtiTool and tell me what an untampered X1600 is? Cheers all ps. this is for iMac, not MBP.