A10-6800K is APU, this is not what You want. FX-6300 is 30-40% stronger as CPU. So no.
Just go for GTX 660 Ti, or 760 Ti, or R9 270/270X.
If You want APU for gaming, You "must" go for A10-7800 Pro or something, or at least 6790K. But it's a hazzard. APUs are strong for gaming, but not as strong as dedicated VGA, like GTX 660 Ti/GTX 760 Ti.