Yea i tried that as well budThere's a BIOS switch on those cards. If one BIOS is corrupt, you can switch to the LN2 or non LN2 bios on the cards.
It's in this image on Hardwarecanucks:
Just scroll down to the image with the dual 8-pin PCI-E power connector image and you can see the little slider switch that can change it from LN2 to non LN2 bios. It obviously should only be done when the PC is off.
i also tried each card individually and one worked great but the other didn't work at all , but i s ok i got a rma and will send it to evga in california and just have them send me nack a new one
no worries at all
and i will be buying a larger psu , as well as some skylake items , ie: 6700k , 16 gig of ddr4 ram at 3400 and a skylake gigabyte gene mb
so i am in no hurry lol mean while i will take this 3770k and build another desktop system lol not that i need another computer