Wisecracker said wise words! A8-7200P has 4 core which will help you in multicore gaming whereas hyperthreated 4200u won't cut, and it's only 1.6 GHz processor! Don't get confused with INTEL"S SUPERIOR SINGLE CORE PERFORMANCE in this case, you need more core!
Both iGPU R5 7200p and R5 230 are better than GT 820m, individually. Don't my and Wisecracker's word gonna mean much but I'd have gone for the AMD!