I will mention, I tried to run the card with 1 6 pin, 2 6 pin, 1 6 pin and 1 8 pin, and just 1 8 pin power connector, with two 6 pin power connections in, both fans spin, with one 6 and one 8, I get 1 fan on the ACX cooler spinning, and 1 of them attempting to spin.
My power supply is a 750 watt, and I spoke to someone before that my power supply should be more than enough.
Now I did have new memory in, I tossed my old memory in just to narrow the problem down, the new memory checks fine, either way I requested an RMA and if the second card does the same thing, I may consider at least a newer psu
The 760 will require 1 6-pin and 1 8-pin to run. As lond as its a decent 750w PSU it should be more than enough for a 760, a decent 750w should have no problem running 2 760's. Could be a DOA card, could be a bad PSU or motherboard problem aswell.
What model of psu did you get, some psus are just bad quality and can barley put out 450 let alone the 750 number they put on the box.
Its an alienware 750 watt, I took it from my previous alienware prebuilt computer, it is a few years old, but all I can do now is wait on the replacement card to be sure, and then I'll go pick up a new psu if needed.
I have an identical problem and I tried switching the PSU's. Anything 500Watts and above should be plenty enough for this card by all accounts. I tried it on 300w, 600w and 750w PSUs. The effect is exactly as described at the beginning of the thread. There has got to be something else. Pls, help.