HOW??
HOW??
Contemporary motherboards often include built-in temperature sensors, requiring software for readings. For older boards, you need an external device such as a thermal monitor.
Using a thermal probe offers insights, but without power stages equipped with built-in thermistors inside the VRM, the measurement may fall outside that range. This lack of regulation leads to less precise and inconsistent results across different motherboards. If the board uses bare MOSFETs, an infrared camera becomes ineffective.
Certainly, focusing on those specific weapons that work within a limited range of effectiveness.
Could this reveal details inside the material of the heatsink? The board's surface area might show a noticeable temperature difference if the heatsink isn't very slim, especially when directing the IR gun toward the back side of the PCB. The PCB's thickness is generally much smaller than the space between the MOSFETs and the exposed board from the front.
Likely not, but if the motherboard includes heatsinks for the VRMs, it probably has modern temperature monitoring built in, which software could read. These are just my thoughts about VVRM heatsinks and board features. Since we don’t know the exact model the person is checking, this remains theoretical.