Just a tip for others wanting a faster SBC to use in Pi-top 3
Banana Pi BPI-M5 fits perfectly in the Pi-top 3
The cooling bridge covers the CPU exactly and keeps it at reasonable temps even under load.
Sorry I don’t have any more close up image.
The M5 has a 16GB eMMC on the top of the PCB so no clearance issues.
4GB DDR4 and the S905X3 CPU makes for a decent upgrade from Pi 3b at very good prices.
Best running OS Image I came across for M5 is Armbian Ubuntu 24 based.