Noctua fans are a good brand, but you can find any clone fan.
On amazon, ebay, many go for well under $8.
All you need is a USB to 3 or 4 pin adapter.
Yes, the fan only runs at ~1.8W at full speed (12V).
At 5V, it'l be reduced to less than 0.5W.
It'll even work on a USB 1.0 port.
Need help in cpu usage tuning
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