The Raspberry Pi Foundation kindly sent over the Fan SHIM and FLIRC for our benchmarking at Phoronix. We've seen just how prone the Raspberry Pi 4 is to down-clocking and where as previous Raspberry Pi boards did fine with a small aluminum heatsink attached, for any serious work you will need a more capable cooler if you care about the performance. In this article we're looking at the Raspberry Pi 4 performance with a Fan SHIM as an active fan designed for running on the Raspberry Pi off the GPIO pins as well as the FLIRC as a metal case that passively cools the device. However, if you will be enduring the Raspberry Pi 4 with significant load for any measurable length of time, an active cooler is almost warranted or otherwise a very capable passive cooler. With the Raspberry Pi 4, a passive heatsink is an absolute minimum for running this new ARM SBC unless you want to deal with potentially drastic performance limitations based upon your operating conditions.
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