Amd removes support for pcie 4.0 on non-x570 motherboards

A few days ago we learned that Gigabyte was removing the PCIe 4.0 support on its non-X570 motherboards, which did not bode well for the manufacturers challenge. Right now, AMD is removing the feature from older chipsets in its latest AGESA firmwares.

AMD Removes PCIe 4.0 Support on 300 and 400 Series Motherboards

AMD has thrown manufacturers' one-sided efforts over PCI Express 4.0 on pre-X570 motherboards with chipsets. Together with AGESA Combo-AM4 1.0.0.0.3 ABB the support will be removed.

Motherboard manufacturers have partially challenged AMD's requirements and have released PCIe 4.0 on motherboards with older chipsets. A recently updated AGESA firmware now removes support for PCI Express 4.0 on all motherboards with pre-X570 chipsets.

Several motherboard manufacturers have added PCI Express 4.0 on motherboards with B450 and X470 chipsets. AMD announced prior to the launch of Ryzen 3000 and the X570 platform that PCIe 4.0 would only be available on X570 motherboards. Manufacturers, however, wanted to update their product portfolio on their own.

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The update in the form of AGESA Combo-AM4 1.0.0.0.3 ABB is also accompanied by other changes. According to AMD, minor issues have been resolved with Ryzen 3000 processors. Additionally, AMD has adopted the "Event 17, WHEA Logger" warning in Windows Event Viewer and XMP profile support for memory.

We don't know exactly why BIOS level support is being phased out when some manufacturers were offering it. This would likely affect sales of X570 motherboards.

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