Please remember that any mention of competitors, hinting at competitors or offering to provide details of competitors will result in an account suspension. The full rules can be found under the 'Terms and Rules' link in the bottom right corner of your screen. Just don't mention competitors in any way, shape or form and you'll be OK.

At the end of the day, the 280x still got more vram and higher memory bus. Also generally speaking, it is faster overall when both cards are overclocked, and that's not even taking in the consideration that the 280x will further enlarge the gap in performance once new games start to support Mantle.280x/770 is a tossup depending on which games you play. One way to look at it is if you want BF4, buy AMD, if you want AC4, buy nVidia. There really isn't much to choose between them.
http://www.ocztechnology.com/res/manuals/SXS2700w_WattChart.jpg
Can I go ahead with GPU upgrade using my existing psu..
And 384-bit memory busif only the 680/770 had 3gb vram eh
