I work at best buy and got these 2 GTX 770 for $315 each, now they have an nvidia box but no other brand (asus,EVGA,MSI etc) who made my card? also is it overclockable?
Yup, these are made by nVidia themselves. Yes, you can overclock the cards to gain a slight boost to it. (Go and YouTube GPU overclocking; there are a tonne of vids) Just do it in small increments till you can be stable throughout your sessions. Just keep in mind that increasing the clocks will kick out a bit more heat.