Left 4 Dead 2
This pretty old game supports only DirectX 9, so Dual Graphics configuration doesn’t work here. In other words, the results in this case are even lower than with a single stand-alone graphics accelerator.
Lost Planet 2
This game supports DirectX 11, but Intel’s graphics works via DirectX 9. This is probably why in 1680x1050 resolution Core i3-2105 based system manages to produce higher fps rate than a system with A8-3800 APU inside.
Mafia 2 is not really an old game, but it uses only DirectX 9, which we immediately notice from the low score of the asymmetrical CrossFire configuration. Other than that, AMD’s integrated system works impeccably. Just as it should, it is more than twice as fast as the system with Core i3-2105 and Intel HD Graphics 3000 and almost catches up with Radeon HD 5570.