Here's my follow up.
https://youtu.be/98ujnl1_hW0 here is a good build guid for you. It is 150$ more than what your asking but it will let you play r6, cs, and gta5 pretty good idk about wow or rust
It runs the 2600, and 580 8Gb, just like in Eric's, but is 200 dollars cheaper.
PCPartPicker Part List:
https://pcpartpicker.com/list/BXjJsZ
CPU: AMD - Ryzen 5 2600 3.4 GHz 6-Core Processor ($126.71 @ B&H)
Motherboard: Gigabyte - B450M DS3H Micro ATX AM4 Motherboard ($70.89 @ OutletPC)
Memory: GeIL - EVO POTENZA 16 GB (2 x 8 GB) DDR4-3000 Memory ($59.99 @ Newegg)
Storage: Inland - 240 GB 2.5" Solid State Drive ($27.99 @ Amazon)
Storage: Hitachi - Ultrastar 750 GB 3.5" 7200RPM Internal Hard Drive ($34.99 @ Amazon)
Video Card: MSI - Radeon RX 580 8 GB ARMOR OC Video Card ($159.99 @ Newegg)
Case: DIYPC - Zondda ATX Mid Tower Case ($33.98 @ Newegg Business)
Power Supply: EVGA - 550 W ATX Power Supply ($49.89 @ OutletPC)
Total: $564.43
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2019-07-22 13:48 EDT-0400
You can also knock another 30 dollars off if you live near a micro center. (Bundling the CPU and Motherboard)