Loss of SLI/Second GPU upon installing Alpine Ridge Thunderbolt PCIE Card with I7-6800k, GA-X99 Ultra Gaming Motherboard

[kayfusen]

Hello to all! Sorry for repeat post, as I couldnt find my first post initially:

I recently purchased the Alpine Ridge Thunderbolt 3 card (version 2.0), to add to my system below:

X99 Ultra Gaming Motherboard
i7-6800k
OS Drive - Toshiba NVME SSD
TWO Sata SSD's
HDD
1070 SLI
running on latest bios

So upon reading the motherboard manual carefully, it mentions the PCIE x16_1 slot would operate at x8, if slot x8_1 is populated (shared lanes). I'm thinking my thunderbolt card would work. However, with the card installed, I lose SLI. The Nvidia Control only recognizes one of the GPU's. It does however show that GPU at running at x8 mode. I was expecting the following

PCIE 16 slot 1: x8 (GTX 1070)

PCIE 16 slot 2: x8 (GTX 1070)

PCIE 8 slot 1: x8 (Thunderbolt add in card)

PCIE 8 slot 2: disabled

Is this configuration not doable with an i7-6800K?

I'd definitely like to know as I'm about to return the card. Thanks!

-Kaonis