Gen4 nvme on PCIe 3 slot - ROG Forum

PCIe 3 vs 4 for Gaming GPUs and SSDs pcie 4 in pcie 3 slot ssd Yes, PCIe is backwards compatible as long as the item fits it The main issue is the slot is slower than the so it won't be as fast as pcie gen 4 in gen 3 slot They are all compatible Even a PCIe SSD will work just fine, but the speed will be limited to PCIe x4

pcie slot pinout A Samsung SSD that can use up to four PCIe lanes The numerical PCIe x2USB USB AudioPCMIUMSSICI2C, SATAPCIe x2