[SOLVED] $ 770 PC July 2020

Solution
getting a B550 mobo, even though its not as feature rich, will give a boost to the GPU due to PCIe 4.0:

PCPartPicker Part List

CPU: AMD Ryzen 5 3600 3.6 GHz 6-Core Processor ($171.89 @ Amazon)
Motherboard: Gigabyte B550M DS3H Micro ATX AM4 Motherboard ($94.99 @ B&H)
Memory: Team T-Force Delta RGB 16 GB (2 x 8 GB) DDR4-3200 CL16 Memory ($64.99 @ Newegg)
Storage: Crucial P2 500 GB M.2-2280 NVME Solid State Drive ($51.99 @ Amazon)
Video Card: Gigabyte Radeon RX 5600 XT 6 GB WINDFORCE OC Video Card ($279.00 @ Amazon)
Case: Cougar MX330-G ATX Mid Tower Case ($51.98 @ B&H)
Power Supply: EVGA BR 600 W 80+ Bronze Certified ATX...
PCPartPicker Part List

CPU: AMD Ryzen 5 2600 3.4 GHz 6-Core Processor ($139.99 @ Amazon)
Motherboard: Gigabyte B450M DS3H Micro ATX AM4 Motherboard ($72.99 @ Best Buy)
Memory: Corsair Vengeance LPX 16 GB (2 x 8 GB) DDR4-3200 CL16 Memory ($66.98 @ Amazon)
Storage: Crucial P2 500 GB M.2-2280 NVME Solid State Drive ($51.99 @ Amazon)
Storage: Seagate Barracuda Compute 2 TB 3.5" 7200RPM Internal Hard Drive ($53.99 @ Amazon)
Video Card: ASRock Radeon RX 5600 XT 6 GB Challenger D OC Video Card ($273.98 @ Newegg)
Case: DIYPC Solo-T2-BK Black USB 3.0 ATX Mid Tower Case ($37.96 @ Newegg)
Power Supply: Rosewill 550 W 80+ Bronze Certified ATX Power Supply ($69.99 @ Newegg)
Total: $767.87
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2020-07-13 15:17 EDT-0400
 
getting a B550 mobo, even though its not as feature rich, will give a boost to the GPU due to PCIe 4.0:

PCPartPicker Part List

CPU: AMD Ryzen 5 3600 3.6 GHz 6-Core Processor ($171.89 @ Amazon)
Motherboard: Gigabyte B550M DS3H Micro ATX AM4 Motherboard ($94.99 @ B&H)
Memory: Team T-Force Delta RGB 16 GB (2 x 8 GB) DDR4-3200 CL16 Memory ($64.99 @ Newegg)
Storage: Crucial P2 500 GB M.2-2280 NVME Solid State Drive ($51.99 @ Amazon)
Video Card: Gigabyte Radeon RX 5600 XT 6 GB WINDFORCE OC Video Card ($279.00 @ Amazon)
Case: Cougar MX330-G ATX Mid Tower Case ($51.98 @ B&H)
Power Supply: EVGA BR 600 W 80+ Bronze Certified ATX Power Supply ($69.99 @ Newegg)
Total: $784.83
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2020-07-13 15:55 EDT-0400

Alternately the 550 Tomahawk is $5 more than your current board
 
Solution