###UPDATE###

I reinstalled the driver with a clean install and shut down my computer and physically unplugged it then turned it back on and I can get it to mine with all 3 cards on stock settings no problem.
However now any time i try to overclock any of the cards even just a little bit it throws the same error stated in OP and even if I hard reset my computer it wont mine again even back on stock
setting unless I reinstall the whole driver again. Does anyone have any suggestions? I'm suing the lates version of EVGA Precision OC.

I am running:
Windows 7 64bit
Motherboard: MSI Z170A M5
CPU: Intel i-6700k
RAM: 2x Corsair 8gb
PSU: Corsair CX750
GPU's: EVGA GTX 1070 8gb, Asus GtX 1060 3gb, PNY GTX 950 2gb all with stock settings with latest geforce drivers just upped the fan speed on each to about 80% with a box fan directly pointed at the cards.

I can run each of these cards by themselves no problem but any time I try to run any of these cards together in any combination after just a couple minutes it throws an error saying
"gpu appears stuck attempting to restart"
"Exiting with code 46"
The 1060 and the 1070 run just fine on Claymore Dual miner v 9.5 so I know the cards are good.
I tried to use nvidia-smi to find the best supported clocks but only the 950 will display supported clock speeds the 1070 and 1060 just say N/A