For better performance in Arma III, you need strong single core performance. The 8350 will do okay, but you will get better frames with an i5 or i7. This article is a little older, but has some good benchmarks comparing different CPUs on ARMA III.
BTW arma III has some issues with lag and low fps these days. Bohemia does a sloppy job with optimization and lots of bugs still there since arma II....