Please remember that any mention of competitors, hinting at competitors or offering to provide details of competitors will result in an account suspension. The full rules can be found under the 'Terms and Rules' link in the bottom right corner of your screen. Just don't mention competitors in any way, shape or form and you'll be OK.
No issues here, using the AMD CPU driver and dual-core optimiser. Could you be a bit more specific as to the symptoms - do heavy-load apps like games run OK? Does it happen at stock speeds?