Yes, the Gigabyte H310M S2H 2.0 supports the RTX 2060 6GB graphics card.
Yes, the Gigabyte H310M S2H 2.0 supports the RTX 2060 6GB graphics card.
Typically any GPU can function on any motherboard since PCIe supports both directions. Even without PCIe 4.0, it would still operate in a system with PCIe 3.0.