Did you put thermal paste on in addition to what came on the Cooljag heatsink? It already comes with paste on it there's no need to add more. Having too much paste can definitely result in higher temps.Ok, I don´t know whats going wrong with my setup, because I´ve got my Cooljag 2U copper heatsink today and the idle temps (54°C and 57°C) are still to high I think.
I remove the original screws from heatsink and fix it with ne Cooljag. Put some Thermal Paste on the CPU and installed the Cooljag. I´ve placed for testing the Noctua A6x25 in front of the Cooljag to blow air through the HS to the back of the case.
I´m a little bit surprised that all of you had significant drops of temps. Mine is only around 8°C.