AMD confirms that PCIe 4.0 will not appear on older motherboards

The focus of the Ryzen 3000 series processors launched next month is PCIe 4.0 support. As a successor to PCIe 3.0, it offers double bandwidth and a range of other optimizations. However, if you want to use the latest PCIe 4.0 technology on your existing AM4 motherboard, you may have some support issues. AMD clarified this issue through a post on Reddit.

Given that older motherboards do not provide the stringent signaling requirements for reliable operation of PCIe Gen 4, AMD does not expect the pre-X570 chipset motherboards to be commercially available.

In order to avoid confusion for consumers, PCIe Gen 4 will no longer be an option when we release the official version of the third-generation Ryzen BIOS (AGESA 1000+).

The only motherboard that supports PCIe 4.0 in the future will be the 500 series chipset, which currently only supports the X570 series, but the B550 series is expected to be available later this year. The new chipset meets PCIe 4.0 requirements, but the older chipset does not. AMD doesn't want to create confusion on the motherboard: some users can use PCIe 4.0 on their motherboards, and some users cannot use PCIe 4.0.

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