I recently upgraded from a C2D E7400 to a C2Q 6600
I did not buy a new heatsink just some new thermal paste.
I idle at 50 and top out at 75 (the hottest Core)
Is this hot? If so what can i do to change it
Oh. Ok. It is some type of passive heatsync. Is this a pre-built computer, possibly an older Dell? I can't tell much from the closeup, but it reminds me of an P4 Dell I had years ago. I presume the fan blowing on it you refer to is the front case fan. I think that is your problem with heat; inefficient cooler. And, from the dirt on the plastic cover(?) shown, I'd say it could do with a cleaning too. Get a can of compressed air and blow out the dust.