Flotillla

On AIDA64, CPU Package, CPU #1/Core #1, CPU IA Cores and CPU GT Cores all have temperatures under 40C, usually in the mid-30s idle. However, the "CPU" tab says that I idle at 84C, which is extremely worrisome. Looking at some other info here, this temperature is provided by my motherboard and not my CPU directly, so should I discard it and not worry about it, or try and troubleshoot? I have an Intel i7 2600k at stock clockspeed.