GTX 970 Strix Confused about wires

[hamid1455]

The ASUS GTX 970 Strix has an 8-pin PCIE on it and my power supply only has 6-pin PCIE on it.

Will this cable work in connecting this GPU to my PSU?

http://www.ncix.com/detail/silverstone-pp07-pcib-pcie-8pin-to-pcie-6-2pin-5d-79540.htm

I'm finishing up my build and hooking up the gpu is the last thing to do.