I did, but good question. I used the same 6 pin pcie power connectors that the 260 was using.
When I first installed the card the gfx card fan came up on full power and stayed on until I shut down the computer. Had a black screen then, as well.
I've installed at least 8 or so EVGA cards over the past 6 years. Never had a bad card, but maybe my number came up.