Jan Panteltje  wrote:
> Nice PI4 box:
>  https://www.ebay.com/itm/223705304329
>
> Came with heatsinks for processor and RAM, a fan,
> and even a screwdriver, arrived in just 10 days.
>
> CPU temperature in previous plastic box was around 70 C
> Now 48 C.
>
> Cannot hear the fan.
>
> Perhaps RFI screening is better too in this box.
>  http://panteltje.com/pub/metal_raspi_box_IXIMG_0251.JPG

But what if you need wifi, that's probably damped quite a bit. Looks nice.
I have a Pimoroni "Fanshim" which gives about the same result. New firmware
also helps a lot. Here is a test of a couple of passive heatsink cases:
https://youtu.be/VJC6OpGpq0Y

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