Thats something wil run but i wont suggest to do it. when u use sli on nvdia gpus or crossfire on amd gpus, they always hv some limitations compared to a single card. For example, if 1 gpu is less powerful than d other gpu thenthat gpu wil restrict d powerful gpu to perform at its max limit. So my suggestion is that sell that gtx 960 and get a gigabyte gtx 970 g1 gaming at much lower price than 2x gtx 960 gpus.
good luck.
Dnt 4get 2 select d bst answer...