GPUs are definitely overpriced right now, but just some basic arithmetic on pricing a $600 ystem would be something like: $110 CPU + $80 mobo + $60 for 8GB ram

GPUs are definitely overpriced right now, but just some basic arithmetic on pricing a $600 ystem would be something like: $110 CPU + $80 mobo + $60 for 8GB ram (you really don't need 16GB to play PC games - just add some swap space if you are really paranoid, and RAM is still overpriced) + $200 for a 580 at MSRP (whenever it gets back there) + $30 PSU (entry level 450-550w bronze units often go on sales that low nowadays) + $30 case (I know at least the Coolermaster N200 sometimes hits $20-30 and is solid). You can get a budget 22" 1080p monitor for about $85-90 nowadays, and a 5 button mouse + media keyboard are usually only about $20. And there are regularly ~250GB ssds for $80 as well, so the total is just under $700 with peripherals. I'd definitely say your mistakes were the monitor and ram. I was recently shopping for all manner of monitors and generally the following price chart applies: 22" 1080p TN for ~$90 24" 1080p TN for ~$110 22" 1080p IPS for ~$120 27" 1080p for $150 24" 1080p 144hz for $180 27" 144p 144hz for $250 (from Monoprice) Anything beyond that is way overkill for gaming, especially 4k, which also starts around $250. The monoprice monitor I mention goes on sale for $250 often and is an unbeatable deal, but the panel quality is lackluster so it might take an RMA or two of that model to get one without a substantial number of dead pixels. If you want to avoid that hassle more reliable monitors with those specs start around $350 though. For ram, that market is a mess too right now, but just like how i7s and 1080s are overvalued in builds, so is 16GB of ram. Especially with an ssd, especially with an nvme drive, having 8GB of swap is not going to do anything to performance. Same with memory frequency - it really does not matter for gaming, especially not enough to consider spending more money for higher frequency kits. The rest is just waiting for a good sale rather than buying everything at once, and its not like you would wait months, just watch /r/buildapcsales for a few weeks and you can pick up a whole build on the cheap. In your build, it is just nickle and dime differences per part that add up. $20 more on each individual piece comes out to several hundred dollars total.