Asus GeForce GTX 950-2G can run without a 6-pin power plug
 

Nvidia's GeForce GTX 950 graphics card is already thrifty on power, but a new version of the card from Asus looks even more efficient. The company's GeForce GTX 950-2G has a near-reference spec sheet, with 768 stream processors, a 128-bit memory bus, and 2GB of RAM. The card is also clocked at 1026MHz base and 1190MHz boost speeds. Get this, though: Asus says the card has a board power of 75W and doesn't need a six-pin PCIe power connector.

http://techreport.com/news/29807/asu...pin-power-plug