Ok thanks all for your inputs, had to go into bios and set up the board for pci 1x, its reading the cards now, Need some other information now though please. 1. Can I use my 1070 8gb and the 2 1060s 3gb to mine together? 2. If so how would i setup the bat file? btw  not sure if it matters but I am running Window 10 64 bit.

Currently with just the 1070 mining this is my bat file.
setx GPU_FORCE_64BIT_PTR 0
setx GPU_MAX_HEAP_SIZE 100
setx GPU_USE_SYNC_OBJECTS 1
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_SINGLE_ALLOC_PERCENT 100

ethminer.exe --farm-recheck 200 -U -S eth-us-east1.nanopool.org:9999 -O wallet.worker/email

pce164p-n06 version 008s, is there anything i have to do for the mobo to recognize that the riser is pluged into the 1x pci slots?

I have 80 plus bronze at 1000w, so maybe just dead risers? all three? had a spare and been trying it as well.

Have tried each card in individually on the board, but on the risers i get nothing registered.

Hey new to this, but I have a 1070 that gets 31mh/s while mining etherium through ether miner. That being said, I recently bought 2 1060 and was looking to plug them to risers but once i have them plug up the gpus have power and fans start turning now the problem is that my system is not recognizing either one through device manager. also once i have that problem solved does anyone know how to setup the bat file for multiple gpus on ethminer once i have the other problem addressed? Thanks for any input.