I mounted it on one side, to have some room for additional components for a planned project, like linear power supply ICs. For some kind of heat pipe I used 14 mm copper cubes (I got some from a craft store, gold plated, which I sanded on two opposite sides, for better contact), glued with "silverbead thermal glue", which is viscous like toothpaste, so the slightly different height of the Epiphany and the Zynq didn't matter, and then screwed the board to the heatsink:
I used a screwplate to create threads for M3 screws in the heatsink (a 2.5 mm drill before using the screwplate works very good). The screws are 20 mm long. Maybe a bit too short, 25 mm would be better, because I attached the Porcupine on top as well, with 5 mm hollow standoffs, and maybe I could use some nuts at the heatsink side for more stable connection, but works for me, doesn't need to withstand strong vibration like in a car or something. And don't fasten it too tight, to avoid bending your board, just a bit to secure the cubes.
Don't forget to bend the serial port pin headers before gluing it, if you need the serial port.
Running xtemp for half an hour looks good (ambient temperature is about 20°C, running the headless version, xtemp output on my X server on my PC) :
For some stress the sysbench benchmark program is running since boot, which causes 50% CPU load. I don't think it will ever reach 50°C, which is far below the max recommended temperature of 70°C.
The voltages on the pin headers of the Porcupine are good, so I guess the 5 mm standoffs are the right height.Statistics: Posted by frankbuss — Fri Aug 11, 2017 11:09 am
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