You may not be getting the best possible performancse. I'm running the AMD A10 (4 cores) and getting around 400 h/sec, or about 100 h/s per core. Given that this is the super-cheap/low-end version of the Ryzen, I'd expect better over-all performance for the 1600. At this time I do not have temp readings.

For what its worth I'm useing the JayDDee optimized cpuminer (https://github.com/JayDDee/cpuminer-opt), which I have compiled myself and run in Docker containers https://hub.docker.com/r/awmyhr/cpuminer/ (NOTE: I have yet to document usage, still in very early stages of getting that all setup).