I had this same exact question when I was first overclocking my 965 because my cpu temp was always higher than my core temps like you. The majority of opinions that I found suggested that you should always go by the higher value to be on the safe side. For some people (like many Intels I think) this will be the core temps, but for others (like many Phenom owners) it will be the cpu temp. I can't say for sure this definitely applies to the Bulldozer chips but if you are wanting to play it very safe the go by the cpu temp in which case you are right there at the limit for that chip. At the very least this is a bump for you and someone who knows more about Bulldozers can confirm this in case I'm mistaken.