There are two PCI-E 16x slots on ASRock B450M Pro4 motherboard. Which one is PCI-E 16x 3.0 and which one is PCI-E 16x 2.0 slot? - Quora
ASUS PRIME H610M-A D4 Intel LGA 1700 mATX Motherboard, 2x DDR4 ~64GB, 1x PCI -E 4.0, 1x PCI-E 3.0, 2x M.2, 4x SATA, 2x USB 3.2, 4x USB 2.0 | LWT
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