RX 570 run at PCI-e x4 instead of x16

PCIe Gen 4 is backward compatible, so a PCIe Gen 4 device connected to a PCIe Gen 3 system will function normally at PCIe Gen 3 speeds That means if you

Unlike a more obvious and drastic upgrade where you can see the difference in the connector itself, PCIe 3 and 4 drives look identical from

pcie 50 slot 2 slots Some of those slots share PCI lanes with the PCIe slots In the one you mentioned it appears that the 3rd slot (M2C, likely means there

pcie m2 slot Max Bandwidth x16 Slot: 4 GBs , 4 GBs ; Notable for being the first generation of PCIe, introducing higher speeds than the previous PCI interface