Well, i experimented with overclocking my Phenom ii 965. I was able to get 3.8ghz stable @ 1.325v, but if i run it at stock voltage i can get 4ghz stable, i don't the because that is a lot of voltage increase for such small gain. i was wondering if this is normal for this CPU. My CPU is revision RB-C3 btw.
Yes that is a normal OC for a C3 965. Stock voltage should be OK but you may need better cooling when you OC to 4 GHZ. When you reach the normal OC limit, it takes a lot more voltage to get beyond the "wall" and it's often not worth the effort for such little gains.