My GTX 770 is quite a hot card and i jsut bought 2 new fans, what is the best way to set them up? both facing one way, or both facing different directions?
what other case fans do you already have? where are they placed and if you could please tell us what case you have that would be great so we can help you better.
have the top blowing out, because heat rises. it is normal to only have 1 in the rear so no worries there. Since you don't have a side fan for that case no need to talk about that one.
Put both on top blowing out to suck the heat out the top.