I've been looking into using cheap Androids to run BOINC, since they are extremely power efficient. Any ideas on what devices work the best for this? I started out using cheap $20 quad-core phones since they work out-of-the-box. Gonna try out cheap 8-core tablet as well. But I recently saw that some Android TV boxes with 8 cores can be had for ~$40 as well. Would these work? Not sure if the BOINC Android app is compatible with Android TV (couldn't get it to work on my Shield TV).

One issue I've found so far is that these cheap devices usually do not have root access available, which would be really helpful in order to undervolt and underclock the device to keep temperatures down. BOINC's default temp limit for Androids is 40C, but I would like to keep it much lower, maybe 30C or less if possible. This seems to be easier on larger devices with slower CPUs.

Anyone have experience with this? I would like to assemble a small collection of devices that together have as much compute power as my old 8-core PC, which is too expensive to run. I saw this thread: https://boinc.berkeley.edu/dev/forum_thread.php?id=10988#69385
but have not seen much posted about results using these.