Exactly. Don't be surprised if the software reports much higher temperatures than your mobo is reporting.
well, i discovered one more thing.. temp is like 55~57C reported by mobo while prime95 den as usual, calculation type changes, temp instantly shot up by 2C, same effect on the core temp software..
Try using MotherBoard Monitor 5 or MBM 5 to monitor every single diode temps & rotations of the 3 pin fans of ur mobo. Direct Dwld Link :- http://www.download3k.com/DownloadLink1-Motherboard-Monitor.html