I would not spend the money to go from a 6th gen setup that needs a new motherboard/RAM/CPU and clean OS setup. I would just get an i5-6600 or i7 for the motherboard you have and get a better card than the RX580 for the money. The nVidia 1660 Ti is a good buy for the price and is a good deal faster than the RX 280. Should get to good quality 1440 gaming on it.