i have a b250m motherboard with lga 1151 socket, my gpu is rx 580, my current prossor is a intel i5-7400. my son uses this pc for gaming and he is experiencing some low fps with all of the graphics setting on the lowest possible. the gpu software has recommended a cpu upgrade but im unsure of what is really beneficial and necessary for good game play. we installed 16gb ram. so, any help in direction would be greatly appreciated.