I had this unit and it increased my temperatures.
I thought it would be better that my corsair h70 but was badly mistaken.
Problem was the base was NOT FLAT and using a straight edge i could see through the gap in both directions.
When screwed down as tight as possible it was still possible to move it side by side.
I returned it AND AM STILL WAITING for a refund.
My advice, DO NOT buy this.
The rubber fan mounting system is hopeless.