I'm fairly new to overclocking, but have managed to get my Phenom II x4 965 BE up to 3.9 ghz at 1.5v and run prime95 stable for something like 14 hours. With my CM hyper 212 plus, the max temps are roughly 57 C, so I wanna try to push it to 4.0 and call it a win. However, this damn cpu seems to hate 4.0 ghz because no matter what I do, it won't stay stable for more than 20 minutes of prime. Everywhere I've looked, it tells me that you generally must raise the northbridge to get that magical 4 on the phenom II x4. As I said, I'm fairly new to overclocking in general, so where do I start when it comes to NB overclocking? It seems easy enough, just raise voltage and clock speed, but I'm not completely certain. Any tips? Using an Asrock 970 extreme4 mobo btw (970 chipset).
Northbridge overclocking brings you up to nowhere. Trust me it's not worthing the instability.
Be glad that you even reached 3.9ghz mine is reaching only 3.6ghz in modest Vcore voltage.
If you want to risk it though than you have to go (if you have an Ami Bios) under 2. or third tab and raise the Mhz in small 5mhz steps until you've reached your Destination.
Take on the FSB and blow this up until you've reached your goal.
Northbridge overclocking is very much recommended as the performance increase is substantial, all i suggested was to do one part at a time. As soon as the OP is happy with the cpu overclock we'll move on to the northbridge.