We see that PlayStation 5 is big. In some eye comically big. But why? There is a reason believe it or not. The reason is for the cooling fan.
“This explains not only the console’s length but its thickness. When Sony designed the console, it very much designed it around the cooling fan. The 45mm fan allows the console to redistribute air from both sides of the console, which should also go a long way in ensuring that no single vent gets dangerously hot.
Interestingly, Sony was toying with going with two smaller cooling fans rather than one large one, which would have allowed Sony to reduce the console’s size. However, it opted against doing this for two reasons. One of these reasons is cost. This would have been more expensive. The second is it made matters more complicated, as managing two fans is more complicated than managing a single fan.

Article:https://comicbook.com/gaming/news/ps5-playstation-5-sony-size/
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