Will these two cards work in SLI?

[MarkExec]

I have been using a EVGA GeForce GTX 660 and I recently bought a Nvidia GeForce GTX 970. I'm not entirely sure if a EVGA card will work with an Nvidia. If not, should I return the Nvidia 970 and get a EVGA 970? Any help would be appreciated!

 

[Gam3r01]

The brand of card doesnt matter, the base chip however does.
No, you cant SLI those cards as they are not the same base chip.

 

[bignastyid]

For SLI the cards have to be the same model of gpu and have the same amount of vram.