Fan in the middle is delta 4000 rpm (not an advantage for NH-D14, in the middle do not fits 38mm fan). I test the delta 5500 rpm aginst the San Ace 6000 rpm and delta is a little better, under 1c.

I have nuch more tests to do (fanless, low rpm etc...), the point is that i test and retest the setups because i want to be sure about the results.

Noctua NH-D14 performs way better than Megashadow and Copper at extreme settings.