I just got the AX-7 last week at the heatsinkfactory. I just got the heatsink and put one of my 50 cfm Sunon fans on. Idle temp is 31 full load is 35. My Vantec CCK 6035D was 35 idle and 41 load and a lot louder with the delta on it. I was tired of the high pitched whine and saw the heatsink at heatsinkfactory and just bought it thinking a 80 mm fan would be quieter and I was right. The performance was just a bonus.