AMD prevents any motherboard that does not carry the X570 chipset from using PCIe 4.0

Blocked the PCIe 4.0 in any motherboard that is not an AMD X570, since it could generate stability problems, among others.

A few days ago, we reported that Gigabyte motherboards with AMD 400 Series chipsets and earlier would no longer support PCIe 4.0. Initially, it was thought to be a company decision, but it appears that this is not the case. AMD, in the AGESA 1.0.0.3ABB microcode, blocks PCIe Gen4. It seems the company doesn't want motherboards older than the X570 to support it.

ASUS was the first company to add PCIe Gen4 support on AMD 400 Series motherboards. Gigabyte, Biostar and ASRock arrived shortly after, that is known. On several occasions from AMD it was said that this was not possible and that it should not happen. As manufacturers have bypassed the restriction, the company blocks this compatibility.

AMD blocking PCIe 4.0 on motherboards with 400 and 300 Series chipsets

AMD's decision is more than correct and the truth is, I think it was necessary for them to block it. The reason is that the X570 have a fan in the chipset, because this new interface generates more load on the chipset. In addition, the voltages of this type of interface are higher and could damage the chipsets and tracks of the motherboard. They just want to protect users' hardware.

Any user who wants to use the PCIe 4.0 interface will need to buy an AMD X570 motherboard. Note that this interface is only interesting for M.2 NVMe SSDs that now reach 5GB / s read / write. It will be next year when units that reach 7GB / s are released. As far as graphics cards are concerned, the improvement is 2-5 FPS over PCIe 3.0.

AMD has also highlighted that this decision is simply for security for users. They emphasize that PCIe 4.0 in 400 and 300 Series motherboards "could generate instability problems in the system."

Source: TPU