The idea behind this build was to design and assemble what I consider to be the overall budget gaming PC build trend of 2018 while focusing on the best (or as close to it as I could manage in Jan 2019) price to performance for components that 2018 had to offer.
To that end:
CPU: While I recognize that cutting edge gaming is moving away from 4 cores towards 8, I still think a solid quad core has a place for at least a couple more years... and the 2200G is, in my opinion, the absolute best value for your money from a CPU in almost any application under $150. (Especially if you were running this in a hyper budget APU build) So, this was an easy choice for me.
Motherboard: It's a B450 board. It had the fan headers I needed, it supports Zen+ out of the box, and it was the cheapest mATX when I was buying components. Really all there is to say about this mobo.
Storage: From what I can tell, 2018 is the year that putting your boot disk on an HDD finally died... and 2019 is looking more and more like storage (even at the budget end) will migrate fully over to SSD's. However! This is the 2018 Budget Meta Build. So, it's a small, affordable SSD for boot and a solid 7200 RPM HDD for games storage.
GPU: I doubt this surprises anyone. The only real competitor, $ per frame, to the RX 580 8 GB is the RX 570 8 GB. What about the GTX 1060 6 GB, you might ask? Find one for the price I paid for this RX 580 that is brand new. That is not an easy task. The 580's, on the other hand, are regularly sub $180 for new stock these days (I bought this one in December 2018).
Case: (sigh) Remember when the Cougar MX330 was $40 and under, regularly? Well, don't worry about it because Deepcool has you covered. I was impressed by this case every step of the way. Could I have jammed everything into a Rosewill or DIYPC micro/mini case? Of course. But 2018, in my opinion, was all about the ATX Mid Tower... so, here was the best <$40 option at the time of purchasing. Real talk, I would build in this again before reaching for the MX330... and I didn't think I would say that before the build.
PSU: It's a Seasonic, it's fully modular, it's got the juice to drive this system for years.
I absolutely could have squeezed out better performance (better mobo, certainly) if I had turned to the used market. But I didn't want to do that. I wanted this build to be all new parts and I was hoping to be able to showcase 2018's best pound for pound price to performance ratio at 1080P for $600 or less.
I think I've done that.