Depending upon resolution if you stay below 720 and Low settings you should be fine. I would strongly suggest going with the A10 over the A8 if you can afford it. The graphics portion of the A10 is much stronger for little more investment.
I have an A8-3850 paired with a 6670-1GB in Hybrid SLI mode. But I did try games on the onboard GPU first. I found it to be adequate at 720 with low settings but struggled at 1080. If you find you need more graphics in the future. I would also advise against Hybrid SLI like I've done it isn't really worth it, your better off just putting in a mid range card when you can afford it.