Hello guys. Yesterday i updated my motherboard bios to F40 the latest one that fully support ryzen 3rd gen cpu. My motherboard is Gigabyte AX370 gaming k5. After i boot my pc i see the mobo logo and then the screen go black and after many restarts i ended up that is a ram problem. If i open xmp my ram will run at 3200mhz but pc wont give signal. If i restore the bios settings and ram go to 2133 the pc boot normally. Did anyone experienced the same problem with gigabytes F40 bios and how i can roll back to an older bios like F35 that i had before.