In addition to my knowledge that PCIe 4.0 does not work with this mainboard when using the latest BIOS version, further statements from users of the mainboards with B450 and x470 can be found on the net, which suggest that PCIe 4.0 with the newer BIOS versions versions was really switched off again. This can also be read from the text.
Quote1:
Users today may find a PCIe 4.0 option available in their pre-X570 motherboards. However, users should expect this option to be disabled when final retail BIOSes are released to implement full performance and stability for new 3rd Gen Ryzen processors.As pre-X570 motherboards were not designed with PCIe 4.0 in mind, their designs may be incapable of running PCIe 4.0 signaling with the requisite stability and performance. To ensure a reliable and consistent experience in the field, PCIe 4.0 will not be an option ultimately available to pre-X570 motherboards. Users may continue with a beta BIOS if they desire, but performance and stability cannot be guaranteed.
I haven’t seen this said beta BIOS until today. Even a request from Asus for such a BIOS has not been successful so far.
Quote2:
Edit: These BIOS revisions will likely be used widely to unlock PCIe 4.0 on these motherboards, but to retain that functionality, you will not be able to update to newer firmwares in the future that lock out support. That means you’ll eventually lose out on the performance-boosting BIOS updates that AMD is known for.
These statements are very speculative. But there is also a direct answer from AMD on the net, which clearly proves that PCIe 4.0 has been deactivated again for these chipsets.
For me this is known. I know how to evaluate the benchmark values correctly.
MeatWar is most likely right. But let’s discuss this further in the thread I opened:
I’m not giving up on getting a BIOS MOD just yet.