Yes XMP enabled and tried also disabled for some reason.
Yes all diff ram speeds show up correctly.
I have 3 different sets of mem that i benchmarked all seperately and also on different games, specifically Starcraft HoTS, Tomb Raider, and Metro LL.
Im not sure how i achieved that 37.7 frame avg, i haven't been able to do it again with any ram-set or config. Im marking it off as a fluke.
I admit when im wrong; HOWEVER, i found interesting results in testing the difference between 1600 and 2666 and 2800(OC).
To recap i have 4 sticks 1600(total 16GB) and 2 sticks of 2666(total 8GB)
I tested only with 2 sticks(8GB) of 1600 and found NOT 1 FRAME DIFFERENCE between any other ram i own and tried.
That's right when i OC;d my 8GB 2666 to 2800 and compared the results to that of 1600(both 8GB and 16GB) I found no avg framerate difference. So this test also concluded that 16GB is still not really needed for gaming these days.
I dont know why but i feel like sticking with the 2800 anyways, at least i have about 21 days to make a decision.