Gigabyte GA-Z270X-UD3 - 6th card getting error 12 problem after bios update

[fzdaros]

Hi!

I have one rig running 6x gtx 1070 and Gigabyte GA-Z270X-UD3, it works perfectly. One of my most stable rigs.

So I recently purchased another set of 6x gtx 1070 to put together on a rig with another Gigabyte's GA-Z270X-UD3 motherboard.
Unfortunately this latest motherboard came with a newer BIOS, which I could not find out how to downgrade.
And with that last setup I can only get 5 GPU to work, whenever I try adding the 6th I keep getting error code 12 on windows : This device cannot find enough free resources that it can use. (Code 12)

Anyone can help me out?

*EDIT: I found the solution - just downgraded the bios to F6 and now they work fine.