Intel chips use a different motherboard than AMD chips so before you think of buying a i5-6500 I would buy a mother board. If you decide to not change, it is worthing buying high-speed ddr3 ram for your apu, because apu's use system ram for "vram". Doing this will greatly improve performace.
EDIT:
GPUs run faster on intel boards than amd boards so it would be worth it to swap to get that extra perfomance.