06-05-2016, 06:13 PM
(06-05-2016, 03:31 AM)longsleep Wrote: To sum this up, without a fan it is impossible to keep below 80*C, with a good heatsink and fan the SoC temperature can stay at around 70*C at maximum speed heavy load (at 23*C ambient temperature).
One more thing not mentioned often enough. Doing any heavy load on the Pine64 will require a stable power supply which is almost impossible to get using micro USB powering. So if your board shuts of or freezes and you think it is the heat it most likely is not - you just got under voltage due to crappy power supply setup.
I'd just like to add that it is quite informative watching your pine64_health.sh running (with the -w) flag when the pine64 is under load... ran stress on mine for several minutes flogging all the CPU cores, disk and memory I/O, and was able to see the CPU throttling to keep the core temp below 90*C (at 26*C ambient atm).
Also, it is more often the MicroUSB lead that is the culprit, more often than the power supply (in my experience anyway... then again, I use 2.4A and 5A/10A rated PSUs, some tweaked to 5.2v
). I have a load of microUSB cables that are either charge only (so no data wires, which is handy when you want to plug your phone in to get a file of it...) or just plain pathetic, they are useless for anything over 1A load (which is probably being too generous... more like 500ma). There is too much resistance in the wire & connector leading to warm cabling and voltage sag, and an unhappy pine64 if it gets loaded up. Hm... I wonder how well you could overclock the pine64 it it were installed in a fridge... internet connected fridge anyone?
