KarthikNS :
Hey guys im buying a new graphic card for next gen gaming and i dont know between these two graphic cards
gtx 770-2gb
r9 280x-3gb
I want to play games at ultra settings with 30+fps on 720p monitor
If and only IF the only thing your are doing is gaming surfing the net playing music, watching movies etc. It's never a bad choice to go with the r9 280x if it is cheaper.
ON THE OTHER HAND, if you do video rendering, photoshop etc. go with a gtx graphics card hands down.
You can use gpuboss.com as a reference. Don't base on gpuboss scores and don't compare cuda cores and shader units. Base it on who has the higher pixel rate, texture rate, etc.