all the evga 500w psu's have 2 x 6+2 pcie connections. the W1, B1 and BQ all have it.
you got to look closer but they should be there. and a 960 should only need a 6-pin for the reference design. some do use an 8-pin but many only need a 6-pin. either way, you should have that covered easily.
another option is the new 1050ti card which is similar in performance and uses either no extra power or only a 6-pin. is a solid choice if you don't have the needed power leads since it does not need one.