I still use the Coolermaster Real Power 620W PSU, since 2010. No problems at all up to now.
The last five years it worked fine with an RX480. I just ordered a new RX6600, the rest of the system will remain the same (B360 mobo, i5 8400, a few SATA disks, an SSD, 16GB DDR4).
Is it a good idea to...