Power-draw considerations
There's not much to choose between the IGP-laden systems in the idling test.
Give the CPU cores a workout and the Core i3-2100 is considerably more power-frugal than the reviewed A6-3650.
It seems as if AMD keeps the majority of the 100W TDP of the chip for the CPU cores, as pushing the GPU to the limit via a 10-minute Just Cause 2 test does little to increase overall power-draw.