ASUS hero X z370 Will Not Run More Than 4 GPUs

I’m having trouble adding cards to my RIG.
My card is not accepting more than 4 GPUs. Tried for windows boot directly from flash drive(hiveos).
I’m using a riser on the smaller PCI slots, I’ve already put a riser on the larger one too, nothing else. In the PCI multiplier it recognizes, but the cards that are connected to the multiplier do not mine. as per photo.
I already removed the Flight sheet and the OC, to restart and to no avail.
The GPUS are: 5 3070 and one 1080ti.
I didnt OC

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