no its not. an A10 with integrated graphics have pretty much the same gaming performance as a G860+6670
however if you instead opt for G860+7750 then yes this setup will pull 25-30% better frame rates.
i strongly recommend 7750 with G860 as a great budget gaming setup.
but the A10 with a 6670 in crossfire will match G860+ 7750 is games that do support crossfire and provide good scaling so decide accordingly
According to Tom's charts the Radeon 7660D inside the A10 is weaker than the Radeon 6670 and the Pentium is also faster according to Tom's as far as gaming is concerned.