AMD Phenom II X4 965 revision C3 review
 

Better core overclockability was also something I thought would be possible, and I can say I was not disappointed at all; the Phenom II processors now max out at over 4GHz on air, which is awesome. With a good water cooling setup, I am sure it could get to around the 4.2GHz mark.

http://www.neoseeker.com/Articles/Ha...ii_2ndcorerev/