The IGPs in the A8 CPUs are around GT440 or HD5570 GDDR3 level in many games:
The IGP in the A8 is around 20% to 30% faster than the A6 IIRC.
I did some extended FRAPs runs in a couple of games at 1440X900 with the A6-3670K myself:
Cat's Hexus A6-3670K self-build AMD APU bundle REVIEW THREAD
D3 and DiRT2 ran quite well at quite decent settings. Hard Reset at high settings actually was not too bad although there were some dips under 25FPS. Civ5 after 300 turns could be a bit choppy when zooming in though,although the settings were not high. However,I did set the RAM manually to 1600MHZ,as the motherboard defaulted to 1333MHZ.