It's been chilly lately in SD but I haven't seen my system go above 39C under full gaming load yet. This is after several hours of play. Usually it's right around 31-35C.
I ran Sandra 2004 for 10 runs doing the burn in testing and my mainboard temp never exceeded 33C. Did it not get worked out or what? I don't know why but it didn't report CPU temp, only MB temp.
I believe these temps are correct because my case has a temperature sensor probe mounted on the bottom of the case to check ambient case temp. That temp is always a couple degrees just below what my Asus PC Probe and Speedfan software reports the CPU temp at.