[RIG][1070] Code 43

[eliecpl]

Hi Guys,

I really need some help.
THis is the 2nde rig i'm building, no problem with first, but this one is big problem.

I'm building a rig with:
Asus Z270P (last bios version)
Celeron CPU
4Go Ram
6*1070
Riser
Windows 10
1000w corsair power supply
etc.

All my 1070 are having a code 43 on Windows. All the GPU are working, since i can see the fans working on it
I tryed several version of Nvidia Drivers (87XX, 88xx, 90xx) nothing make them work.


Really don't understand what wrong

Any idea?
i'm thinking bad riser, but not sure?

Thanks a lot for help