desktop gaming with discreet gaming gfx card:
from better to worse:
sb i5 overclocked > sb i5 > sb i3 > amd a8 overclocked > amd a6 oc > amd a8 stock > amd a6 stock.
desktop gaming with integrated gpu:
amd a8 overclocked (cpu + gpu) > amd a6 oc > amd a8 stock > amd a6 stock > sb i5 overclocked > sb i5 > sb i3
laptop gaming with discreet gaming gfx (no amd dual gfx in specific cases):
sb i5 > sb i3 > amd a8 > amd a6
laptop gaming with igpu:
amd a8 > amd a6 > sb i5 > sb i3