![]() ![]() Here's my hacked-together solution, using a bunch of standoffs to make some open-air frankencase: The biggest issue is figuring out how to encase a Pi with this massive heat sink. But it does a darn good job cooling the Pi. It's a specialty tool, one that few really need. but you need to take into account the massive size of this cooler. Now, you might look at the above graph and immediately jump over to the Seeed Studio shop to buy one. I mean, look at the bottom graph if you need to run the Pi wild, there is no better active cooling setup I can think of, short of liquid immersion cooling! The temperature under load is lower than the idle temperature of a bare Pi, or even a bare Pi with a fan blowing over it! A brief review of the ICE Tower Cooling Fan Active cooling (just a fan blowing on the Pi, no heatsink) is an order of magnitude better than nothing.Without any cooling assistance, the Pi can get uncomfortably close to the CPU's temperature throttling limit (~80☌), either bare or in a case.The second standout result is a graph comparing all the different cooling options I tested pre-firmware-update: The delta is between 6-8☌, which is quite significant when you're talking about the tiny Raspberry Pi! Active cooling and massive heatsinks make the Pi very happy Here's the graph comparing the Pi in the case before (blue line) and after (green line) the firmware upgrade: but I'd be much more comfortable doing so now that the USB controller is not generating as much heat! ![]() I still don't like running CPUs right up to their thermal limits all the time. But after the firmware update, the Pi 4 in an unmodified case might not be so bad. ![]() This was what prompted my original blog post on the subject. If you run the Pi 4 in the official Raspberry Pi Foundation's case, unmodified, the CPU would start throttling within a few minutes of any serious activity. Firmware upgrade makes the Pi case usable There are two result sets that stand out the most to me. I first ran all the tests without the updated firmware, using the latest version of Raspbian Lite from the Raspberry Pi foundation's website, then I updated the firmware following the guide in this article from. Upgrading the Raspberry Pi's Bootloader and Firmware
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