How to check the CPU temperature in real time without using any software!

I think the air inside the computer case will definitely be warm because the space inside is quite limited. But still... the purpose of these intake and exhaust fans is also to create an airflow through the system unit. The front fan blows air in, and the rear fan blows it out. This airflow cools the video card, the processor heatsink, and other hot components. A simple example: if it's hot, take a fan (I sometimes use a mousepad for this purpose) and wave it at yourself – you'll definitely feel cooler, even though the temperature of that air remains the same.