Quote: Originally Posted by Tommyd
How much can I overclock a Phenom II x4 965 Black Edition?
The heatsink/fan is the one which came with the processor, my case (Antec 902) has 3x120mm fans and 1x200mm fan.
The PSU is 600W
How much can I safely overclock this?
Unless the stock AMD heatsink/fan is a lot better than I recall, you want a third-party cooler for serious overclocking. (I'm using Intel at the moment; the Athlon 64 X2 was a few mainboard transplants ago.) I was able to use a rather tall HSF (Thermaltake Big Typhoon) in an Antec 900 without any trouble.
The big ones may require you to remove the motherboard from the case to fit a backing plate. In fact, that's a good thing: I suggest you avoid large sinks that don't require a backing plate. (Risk of it coming loose, or damaging the motherboard.)