An exhaust fan takes the air from the case and pushes it out into the surroundings. So wouldn’t that very act of removing air from the case create lower pressure in the case, causing air from the outside to get sucked in, regardless of the existence of intake fans?
In: Technology
Other responses are correct but they haven’t mentioned how air likes to form vortices. With no front intake fans, GPU and CPU air intake would become negatively pressurised, meaning some hot air exhausted would rush there making your pc parts unable to cool themselves. Your case would become an oven.
Intake fans are needed to create positive pressure in places so that hot air doesn’t recycle itself in the case. This also happens outside of the case, so I advise using some natural barriers to ensure this doesnt happen. Such as keeping the PC exhaust air seperated with something like a monitor.
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