Bought to replace the original Intel cooler for my i7 4790 @ 3.6GHz. He could not cool at full load and reached 90 ° C without a problem! :( With the Noctua NH-U9S the i7 4790 overclocked to 4.12 GHz does not exceed 70 ° at full load under OCCT. In normal load, games ... we do not exceed 65 ° c. Small precision, I set up a second NF-A9 PWM to put in Push / Pull and increase cooling. Oh, and all in silence and without the fans will run at full speed. Small footprint and mounting more than easy (on an ASUS Z97-A). I am more than satisfied with this product!
