I am just wondering if you found a solution.
When I set up my kit, with dual Samsung 980 Pro NVMe on RAID 0 in order to provide me with RW bandwidth of around 10GB/s everything worked fine - see picture here from the magician:
A few days later my write speed has decreased from over 10GB/s to less than 3 GB/s
In the meantime I haven't done anything else than to add AMD latest drivers for RAID and the Chipset tools.
But even after removing all the tools I see no improvement in the performance.
One thing that I noticed is that in my bios the driver of the RAID controller, appears to be the 9.2.0-00127 version, whereas on my windows I have the latest 9.3 version.
I do not know how to update the RAID driver version on Bios. Even the latest BIOS update does not seem to contain the 9.3 driver.
Any ideas about this issue will be greatly appreciated.
Thank you.