For heavy overclocking H70 = fail for shure, thought this was Spanks grinder ?
Clocking bro think outside the box ... unless it is SB .... prolly get 5GHz in the oven at 350 ...........
George, I have not measured the air but they do move a lot at a reasonable noise level
I love mine as that is what I used for the top intakes ... on the linked rig