We have 5 Ryzen CPUs in my wife's small mining farm and 2 Ryzen CPUs in personal computers. They have all been CPU mining for several months at a minimum and we have never had a single issue with them. They are very stable and power consumption is quite reasonable if you don't overvolt them. Temperatures are lower then when running CPU benchmarks or stress tests too. Ie. mining has lower temps then running Cinebench etc...