If you gonna have this man spend 800+ dollars, may as well just have him build a new system. Taking some of the parts that he has (which I assume you did with "0.00" for price. I can do the same thing, with more.. for cheaper.
https://pcpartpicker.com/list/vzFsTB
CPU: AMD Ryzen 3 1200 w/Wraith cooler 3.1 Quadcore ($74.32 Amazon)
CPU Cooler: has quality fan included (0.00)
Motherboard: ASRock - B450 Pro4 ATX AM4 Motherboard (Purchased For $69.89 OutletPC)
Memory: G.Skill - Ripjaws V Series 8 GB (2 x 4 GB) DDR4-2400 Memory ($45.98 @ Newegg)
Storage: Samsung - PM961 256 GB M.2-2280 Solid State Drive ($59.95 Amazon)
Storage: Mushkin - Source 500 GB 2.5" Solid State Drive ($54.99 Amazon)
Video Card: MSI - Radeon RX 570 8 GB ARMOR OC Video Card ($139.99 @ OutletPC)
Case: Cooler Master - HAF X ATX Full Tower Case (Purchased For $0.00)
Power Supply: Corsair - Professional Gold 750 W 80+ Gold Certified Fully-Modular ATX Power Supply (Purchased For $0.00)
Operating System: Microsoft - Windows 10 Home upgrade from 7. (0.00)
Monitor: Acer - KG271U Abmiipx 27.0" 2560x1440 144 Hz Monitor ($267.99 Amazon)
Total: $713.05
Faster, better, cheaper. To rebuild. Using your logic.