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Bofferbrauer2 said:

EricHiggin said:

For the longest time I've always wondered why cases didn't just have one massive side panel fan. The flow path wouldn't be great but the fan could run at low rpms and would be next to silent for more casual set up's. For higher end rigs, you'd want a case with a lot of mesh, top to bottom and side to side, for a large single side panel fan to work reasonably well.

In the past, before window kits were so prevalent, the ability to install some side panel fans were pretty common, and often even came pre-installed as they were bigger than what you could find on the market on the time (generally 220mm-320mm). They disappeared as they didn't do much for the cooling, and worse threw off the cooling pathways for the front-, back- and top panel fans. In some extreme cases (ha!), removing or disabling the side panel fan actually resulted in such a better airflow that the temperatures dropped.

They usually helped with GPU temps, tho. But yeah, they did little for CPU or overall case temps.