This is a very basic case, heatsink and fan, but it costs $11. The Raspberry Pi 4B (RPi) board fits perfectly and is held securely by screws. The fan fits snugly on top of the lid and is hidden once installed, and is a few millimeters larger than other fans I've seen in cases. This makes it more efficient in its task of cooling the RPi. The heatsinks that go onto the board chips also help a lot. Before I put my board (which I use as a network packet capture device to troubleshoot my customers' networks) in this kit, it was running at around 65-75 degrees Celsius. With this kit she works closer to 40-45 degrees. My only wish is that I find a version of this kit that also includes RPi, power supply and micro HDMI adapter. I think it would give Canakit a real run for their money! The only downside is that the fan isn't silent, but it's still pretty quiet. Edit: I wrote my review in September 2018. It's February 2021 and I'm still loving this case! I have 2. I just want to add a few things to that. Firstly, this case is NOT suitable for Raspberry Pi 3B or 3B+ boards without what I would call a major modification. These boards have a full-size HDMI port and the network port is on the left side of the end along with it and the USB ports. The 4B has the network port on the right side and the USB ports have been moved to accommodate this change. This change was made to make room for the audio jack to make room for 2 x 4B micro HDMI ports. These changes may seem minor, but they're really annoying when trying to fit one board model into a case designed for another model. Second, the reviewer who said the fan cables interfere with the fan did not install their fan properly. If you install the fan correctly, there will be no problems. My cables are neatly tucked away and always have been. I made sure the fan was mounted so that the cables lay neatly on their own, which took some thought and rotating the fan housing to the correct orientation on the shroud, but it doesn't take a genius to figure it out. . All this reviewer has to do is remove the mounting screws from the fan and rotate it 90 degrees to one side or the other (or maybe 180 degrees) and the problem is gone.
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