Dual GPU not booting

[Simtpal]

Greetings, 

 

I have a 2080 super on my machine and recently got access to a 1070ti. I use the computer for gaming, rendering, simulations and other work related tasks quite a bit so I was wondering if I put another GPU in my machine I can utilize more VRAM for my renders as I do max out the 2080 super's VRAM. And I would not mind the extra non usb c display outputs as well. When I plug in the 1070 ti into my second slot the motherboard does not boot into the bios. The debug led gets stuck at VGA and does not continue to boot. I have tried putting just the 1070ti which works. It just never works together. I did notice for my motherboard if I populate the PCIEx1 slots it reduces the PCIEx4 slot so I made sure they are not popluated. Here are my specs.

 

AMD R7 2700X 

32 GB 3200 mhz RAM

2x M.2 SSD 500, gigs each

2x HDD, 2tb and 4tb

750 watts corsair bronze power supply

B450 AORUS ELITE (rev. 1.0)

MSI rtx 2080 super gaming x trio

EVGA GeForce GTX 1070 Ti SC GAMING

Windows 10 Pro x64 

BIOS version f5

 

I have also attached some additional details from MSINFO32

 

Please let me know If I have not provided all the information properly. Any help is appreciated.