This effort is hampered by the small size of the chassis. In this small chassis, on the other hand, with so little air mass, it takes a lot of air movement to dissipate the heat generated by the processor and other components in this system. Your tower system is very highly dampened by the (comparatively) massive air volume within that chassis. We are talking about a very tiny case with a very small air volume inside. This means that the processor can run at or below 80☌ all the time - and in fact can do so for its entire warranted lifetime - without suffering any thermal-related degradation. This processor has a TJmax of ~100☌ and a projected Tcontrol of ~80☌. For the processor, this level is considered nice and cool. Secondly, let's put these temperatures in perspective. Bottom line, monitoring temperatures while in BIOS is simply not the thing to do and a waste of time as a comparison method.
Instead, it must continuously loop around polling all of the possible input sources to see if anything has changed. This means that the processor cannot halt itself (as it does in an O/S) when it has nothing to do and wait for an interrupt to awaken it. First of all, all power management capabilities in the processor are disabled. While in Visual BIOS, the processor is never in an idle (no load) state.