From the first pic you posted with the huge cooler I can see that you blocked the first slot on the memory with the cooler. If the memory is placed as you have it shown then would it not then downgrade it from DDR3 to DDR2? You have it in slot 2, 3, and 5 from what I can see. You would really want 1, 3, 5 or 2, 4, 6 (mfgr usually suggests memory in slot 1 but I have not tested these things). I only note that the memory placement might defeat your purchase of DDR3.
I don't question your testing results but do you have a screenshot of CPU-z showing the memory QPI and the memory speed with the north bridge frequency - you should also then see if its DDR2 or DDR3. Maybe if you move the memory so it's all in the same colored slots would it then be DDR3?
Just curious.
I used to have a Rampage II Extreme and I know that things are tighter on the III. For some reason everything is just crushed up around the CPU giving no room.
You testing and results look impressive!
Geat work!