I can only get my X2 3800 up to 2.2GHz - any higher and it fails Prime almost immediately. I've tried raising the vcore, the RAM voltage, running the RAM at 667 instead of 800, loosened the timings, changed the HT speed to 4x.....temps look OK. I'm not sure what else to try. I thought it would be better when I dumped my old Biostar board for a Gigabyte (I didn't swap purely for OCing reasons...) but still no joy. Have I just got a lousy clocker?