Fellas,
I have an Asus prime Z270-a and it's supposed to run up to 8gpu, though I can't even get the 4th to work.
Did you enable Above 4K Decoding?
Yes i did but that Should only affect memory mapping over 4gb and not Windows detecting the gpu....according to the list below
I'm going to try to disable sata ports as i don't use them.
Any other idea?