The PC build you mentioned, consisting of the Ryzen 5 5600G, Gigabyte B550M DS3H motherboard, Gigabyte GTX 1660 Super graphics card, 2x8GB 3200MHz RAM, 128GB M.2 NVMe SSD, 500GB HDD, and FSP 650W 80+ Bronze power supply, is compatible and well-balanced. It should work together effectively to provide a capable gaming PC. Ensure to check for any specific compatibility requirements or BIOS updates for the motherboard before assembling the system.
PC Hardware Specialist