Anecdote warning: As the happy owner of quite a few RPi, I had a really poor experience with the Rock64 (I know, it's not technically a Pine64). Multiple SD cards, mulitple power supplies and I can't get it to run for more than 5 minutes at a time without locking up. Doesn't appear to be a thermal issue as far as I can tell. Of course I probably just got a bad board, unfortunately after multiple emails I can't get a response from their customer service. I'm ready to just throw it in the trash. Really disppointed because I really just wanted an RPi with usb 3.0 and gigaibit ethernet, it seemed perfect.

edit: tried both armbian and android