The only way to observe your PC's internal temperature is from the BIOS screen ... iStat Menus is widely regarded as the best system monitoring app around, and if you're an advanced user looking ...

If you just want to monitor your PC's CPU temperature, we recommend using a simple utility like Core Temp. The Core Temp app ...

If your computer gets too hot, its performance will suffer and the CPU could get damaged. Here's how to monitor your computer's internal temperature.