For gaming which of these CPU's would be the best deal.
Also Plan on overclocking with a Hyper 212 Evo.
between the two, the 8120 is the better overall performer. afaik, it's got more integer cores, similar oc potential with a decent cooler. all fx cpus are harvested from the same die. 8120 is a lower clocked 8150, 4710 is a high clocked 8150 with defective cores lasered off.
for overall gaming, though, intel sandy bridge and ivy bridge core i5 cpus are better than fx cpus.