We've known for some time that, under some conditions, existing PCIe 3.0 motherboards can support the faster signaling rates of the PCIe 4.0 specification, but AMD's motherboard partners have not explicitly announced that the feature would come to existing models.Īt CES 2019, AMD confirmed to Tom's Hardware that 300- and 400-series AM4 motherboards could support PCIe 4.0. ![]() ![]() ( Support for A-series motherboards is still curiously up in the air). It should go without saying, but you would also need a processor that supports PCIe 4.0 to unlock the faster transfer speeds, so current-gen Ryzen CPUs will still operate at PCIe 3.0 speeds.ĪMD will also support PCIe 4.0 with its next-gen 500-series motherboards, ushering in a new wave of powerful devices like faster SSDs, but as part of AMD's standard promise of backward compatibility for AM4-Socket processors, these new 7nm processors will also drop into the existing X370, X470, B350 and B450 motherboards that are already on the market. Gigabyte hasn't officially announced PCIe 4.0 support for its 300- and 400-Series motherboards, so it is unclear which models would support the faster interface, or if there will be limitations.
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