BOUNTY HELP FOR 0.5 ZCASH: Getting 8x NVIDIA GTX 980 Ti GPU to be detected on Asus PRIME Z270-A Motherboard / Windows 10

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Thanks to your help I managed to get 7 card recoginized in windows.
Just to note that windows must be installed in GTP partition as mentioned here:

Solved: MSI Z170A SLI PLUS - 1 to 6 GPU Problem

Here’s my working setup again: Flashing Bios and Installing the latest release Installing Windows 10 Pro on a UEFI/ GPT partition (here’s nothing to do - it works out of the box) doing all Windows updates Connecting only one card with a USB-Riser and installing the drivers - you have to be patient with WIN 10. It can take several minutes. Open the device manager and take a look at the Graphic section. Only if NVIDIA GeForce GTX 1070 is shown there, driver installation is finished. Wait this ti…

but my 8th card which is plugged into the M.2 to PCI card was not recogized. If I insert it to a normal PCI slot using the same riser, it works
I also use the same Z270-A mobo

So, did you need to do any specific steps to get the 8th card work?

Thank you