I originally bought my MSI R9 270 for $120. Since the introduction of the RX 480, the price of the R9 270 has dropped to $69. My motherboard allows for Crossfire. So far, I have not played a game where I seemed to have needed it. My highest resolution monitor is 1200p and I seem to be able to play everything on high or even ultra settings without issue. However, the most recent PC game I own is Arkham Knight - I have not yet tried to play that one, and I have a feeling it might benefit from a bit more horsepower. Do I Crossfire with a secondary R9 270 for an added boost, or do I sell my R9 270 and upgrade to an RX 480? The cost will come to the same. I know there is a difference in power usage, but my PSU is 850. Or would I do better to invest in upgrading the CPU from a G3258 to an i5? (also if someone feels the need to point to an Nvidia alternative, I am open to that as well)