PCPartPicker Part List:
https://pcpartpicker.com/list/TR8Gx6
CPU: AMD Ryzen 5 3600 3.6 GHz 6-Core Processor ($189.99 @ Amazon)
Motherboard: MSI B450 TOMAHAWK ATX AM4 Motherboard ($111.99 @ Amazon)
Memory: G.Skill Ripjaws V Series 16 GB (2 x 8 GB) DDR4-3200 Memory ($69.99 @ Newegg)
Storage: Crucial P1 1 TB M.2-2280 NVME Solid State Drive ($99.99 @ B&H)
Video Card: EVGA GeForce GTX 1660 Super 6 GB SC ULTRA GAMING Video Card ($239.99 @ Best Buy)
Case: Fractal Design Focus G ATX Mid Tower Case ($55.88 @ Amazon)
Power Supply: Corsair TXM Gold 550 W 80+ Gold Certified Semi-modular ATX Power Supply ($73.98 @ Newegg)
Total: $841.81
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2020-01-22 16:07 EST-0500
Gave you one of the few cases these days that still has an expansion bay for a optical drive, but feel free to change the case to whatever you want. You could also save about 50 USD right now and drop down to a Ryzen 2600.
The only other savings would be to get a different motherboard. I gave the Tomahawk since its a good board and the BIOS can be updated without a compatible CPU just in case you choose to go with the 3600 and the BIOS isn't up to date. Here is a list of boards that the BIOS can be updated without a CPU installed.If you go with the 2600 you can get pretty much any B450 out there.
View: https://www.reddit.com/r/Amd/comments/bvfo57/list_of_b350_b450_x370_and_x470_motherboards_with/