Geekworm Raspberry Pi 4 Case, Raspberry Pi 4 Model B CNC Ultra-Thin Aluminum Alloy Metal Passive Cooling Case, Raspberry Pi 4 Heatsink Case Compatible with Raspberry Pi 4B, Pi 4B, Pi 4 Only (N300)

Overall this case is actually an excellent design. However, there are two (possibly three) complaints I have:First, it is not designed to support active cooling at all. There is nowhere a fan could be mounted and it is the bottom (which is likely sitting on a surface) with the radiator part of the design. If you're using a RPi4 in a normal manner it should have an equilibrium temperature well within a safe range, but if you do any sort of overclocking or heavy usage it can begin to go up a bit higher than is ideal for maximum long term use. (In my own testing it never at all approached thermal throttling temperatures. This was in a room that stays at a fairly optimal temperature and good airflow however, and in less ideal conditions it may reach a much higher equilibrium.)Second, the choice to put the radiator fins on the bottom is a design choice that reduces its effectiveness in many ways. On the one hand, the reason the top is flat is because it's designed to be able to handle a HAT, but on the other, the top is the portion that directly contacts the CPU and RAM chips -- not the bottom -- so heat must dissipate much less efficiently from one side to the other. This is also troublesome because the bottom can sit fairly flat on a surface and may also suffer lack of airflow due to this (though they offer rubber feet to put on the bottom which at least raise them a millimeter or two.) I do believe the top still could have had at least some slight indentations to give it a bit more ability to dissipate directly. That wouldn't be as effective as full ridges, but still would be an improvement. I do wish they had at least accommodated the possibility of a fan with a place to mount one or something (no need to include one since they can be bought separately, just mount holes over some holes or raised area.) It's possible to mount it somewhere further away from a surface -- in fact it has mount screw holes on the bottom -- and even to place an external fan, but this does complicated overall design considerably. I did add a couple of short heatsinks to the top since I don't plan to use a HAT right now and it does seem to have helped considerably, but without active cooling it still can get fairly warm. Nowhere near to thermal throttling temperatures under normal conditions however. I didn't have sufficient time to test maximum temperature under constant stress, but of what I did test it didn't exceed 60C during the hour or so I was able to continuously stress it. You're unlikely to ever want to use this for factoring or folding or something (far less efficient than a good CL-accelerated design) so I do think that a full stress test isn't indicative of normal use even with overclocking.I may have a third complaint in that I think it is affecting WiFi stability, however, this has not been thoroughly tested and verified yet (I'm primarily using ethernet.) It is anecdotal, but the RPi in it has been having considerably worse WiFi performance and reliability since installing it. However, since it's not tested much and it is overclocked I can't confirm that at this time.All the rest I have to say about it is entirely positive however. The design *IS* overall a really good one. The radiator fins on the bottom are thorough enough to allow a fair bit of heat dissipation. The entire enclosure makes good contact with itself too. Most of these metal enclosures barely actually connect the top and the bottom directly. Typically they sit on either end of the RPi's PCB, not extending past the board so the only actual thermal communication between one end an the other are the screws holding the two sides together. Since the metal of the top and the metal of the bottom are directly in contact with each other the efficiency in transferring heat from the top to the bottom is far higher (thus the whole thing is a heatsink instead of just the top part as with most metal enclosures.) I took things a step further by putting a very tiny amount of thermal paste between the two and feel like it is exceptionally effective, though I wouldn't say this is strictly necessary.Also, my favorite part of this is it is a true enclosure while still being extremely minimal. It barely extends past the PCB, but does still do so. This protects the RPi itself from many things, but also, more importantly, the connectors are seated tightly in the enclosure. This makes it nearly impossible to push one up too hard and pull it loose from the board (yes, I've seen it happen.) I do believe it should protect the RPi itself from practically anything (although the USB and ethernet ports would be vulnerable to something really extreme.) I think not many people are running cars over their RPis however, so this likely covers most realistic scenarios.Overall this is definitely a great case. I can absolutely recommend it if you're using external WiFi or ethernet, but more testing is needed if using the internal WiFi.

He comprado la funda para una raspberry pi que llevo comnigo siempre. Ya que yo utilizo macOs en mi día a día, a veces es útil tener un sistema con linux a la mano. Desde que tengo la funda no me tengo que preocupar por la temperatura o el ser extra cuidadoso con cargar mi pi, simplemente la puedo echar a la mochila con el resto de las cosas y usarla cuando es necesaria.

It fits the Pi V4 very well, and it's very sturdy. The only issue I was I initially put the little acrylic end piece on upside down and could not insert the SD card. Easily rectified, and I am very happy with it.

I’m impressed with the quality and design of this case. I’ve purchased many and this is by far the strongest and best looking.

For passive cooling housing this works great with my raspberry pi 4!I like how slim it is and all connectors are accessible. I use an extension for the gpio pins ;-) active cooling would be cooler for sure but this is great for me and my applications!