I'll be installing the 3700x over the weekend.if you already have it... it will be faster than a 3XXX chip. but if your buying then get a none G, the 5600(£100 used) is a fast little cpu you dont need a 5700.
did you drop in the 3700x? i dont see the 3700x holding back the GPU.
run some bench marks and see how you get on