$300 is kind of an awkward price point for GPUs because it will almost, but not quite get you the best value gaming GPU right now, the GTX 970.
Thanks mfenn. I see what you did there Ken. 😉 I suppose I would say that after upgrading to the 270x from a 6850 I'm most disappointed in the performance of Diablo 3, Far Cry 3, and Bioshock Infinite. Diablo 3 to the point where I'm sometimes slightly suspicious that the card isn't working correctly in the first place.
Well his graphics card is a R9 270x released in I think 2013. The CPU was released in 2009.Upgrading the gpu will definitely get you the best return possible.