This is an Overwatch themed build for 1080p gaming.
The key to this build is the AOC 1080p freesync monitor. It has a freesync range from 35hz-75hz which is perfectly suited for the RX 560. Kinda wanted an RX 570, but at $95 I couldn't pass up the RX 560. Most games should be able run within the freesync range with maybe some settings dialed down on more demanding games.
All parts purchased over time as they went on sale. I had a couple parts laying around and some from work including the RAM, PSU and the Corsair fans. The Rosewill mouse came free with the purchase of the keyboard.
The Cooler Master Masterbox Lite 3.1 TG is a fine budget case except for one little flaw. It doesn't have great airflow intake. So I cut a hole in the front and place a custom made Overwatch acrylic cover that is mounted about 1" away from the front to allow for some extra airflow. I'm kinda new to case modding, but I think it turned out pretty well. For $30 with tempered glass this case a gem of a budget find.
Less than $500 and that includes the monitor.
I'll edit soon to include some benchmarks for those who are looking for a solid budget 2018 PC.
Overwatch (High preset) - 75-85 fps - smooth gameplay 1080p
Doom (High preset, FXAA) - 45-60 fps - within freesync range, smooth gameplay 1080p
GTA V (High preset) - 50-60 fps - within freesync range, very few occasional stutters (CPU bottleneck?) 1080p