There's only real 2x kinds of AAA games out now, heavy single thread like cs:go, LoL, rocket league etc which generally use 1-2 threads or multiple thread games which can run on 4 threads, barely, but are optimized for 5-8 thread usage. Non of the FM2+ cpus can effectively deal with the multiple thread games, BF1 for instance will put any i5 to 100% cpu usage, and with Amd only having @ ⅔ the IPC of a moderate i5, it's going to tank, hard, there won't be anything close to 20-50fps gains, more like 2-5fps at best. The best hope is for the single thread heavy games, which plays into the 4 threads or less of the FM2+ cpus, but you still have to deal with the lousy IPC, which will throttle the cpu if paired with a decent gpu. For FM2+ cpus, anything more than a gtx1050ti is going to have negative effects on the cpu. Even if it's an A4-5300 (lower end A4 at 3.4GHz) or an X4 860k (top end at 3.7GHz) the differences are negligible in computing speeds and power.
Pretty much, for a AAA gaming pc, you'll need either a newer i7 or a Ryzen 5. Anything less is wasted money as the cpu won't be enough to handle the workload AAA titles are demanding now. 2 years ago, a quad core was enough, but things have changed,enough that even top ranked i5's are in trouble.