My Ryzen 1800x box is so disgustingly fast that it almost makes up for the consistent stability issues I've encountered while using it
That said, I got it sorted out. It turned out to be an incompatibility with both the NVMe disk I was using as well as an incompatibility with the memory I had purchased.
Getting the exact parts listed in your motherboard manufacturer's compatibility list appears to be pretty important for Ryzen currently. It's been rock solid since I swapped out those components.