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ASUS ROG Strix Z790-A Gaming LGA 1700 - BIOS 1801 - Update?

Level 7

I just put a ASUS ROG Strix Z790-A Gaming LGA 1700 MB into my new build (with a 14th Gen i7) I guess I need to update the bios to make this work. I have the 1801 bios on my USB stick with FAT32 and renamed properly. This is what happens....

Plug in PSU / ( DON'T turn on PC )

Plug in USB stick

Press Flash button / Light turns FLASHING GREEN

Release Flash button / Light goes SOLID GREEN after 3 seconds

Nothing else happens. Just stays solid green ..... but BIOS does not seem updated.

It happens so fast, from the time I push the button until the light goes solid green is like 3 seconds. What could be wrong ? Or just any thoughts ???

Thank you