This computer was built over a the last year to become the living room gaming system. It runs Ubuntu 18.04 LTS and is used to play Steam games on the TV. Two Xbox One controllers connect to it over Bluetooth.
There was a first iteration that reused an Antec Sonata III case and a Seagate hard disk from 2008. A new motherboard (GA-AB350M-DS3H), CPU (Ryzen 3 1600X), and GPU (Nvidia GTX 1060) were bought as a major upgrade. It was running quite nicely! At some point I wanted a bit more power, but I was afraid the decade-old 500W PSU could cause stability issues. The Fractal Design case and SeaSonic PSU replaced the old parts. There were good deals on the Ryzen 5 3600 CPU and that seemed like a great upgrade. I added a $500 open-box GeForce RTX 2060 Super GPU in case we wanted to play VR games in the future.
Unfortunately, the system died during an overnight memtest run and couldn't boot anymore. I thought I had managed to brick the motherboard because of a corrupted BIOS. I bought a replacement motherboard and new RAM. That board still didn't boot so we suspected the CPU was dead. It would take a while to receive a replacement CPU, so I picked a Ryzen 5 2600X at a local store. Finally the computer POSTed and everything worked! The second-gen Ryzen doesn't seem to handle the max RAM frequency, but 2933 MHz seems just fine.
This system will eventually be upgraded with the Ryzen 5 3600 CPU and improved cooling.