4 ms·They start small enough for cooling VRM's and go up to iirc 20cmby jowsie 6y agoThey start small enough for cooling VRM's and go up to iirc 20cmMacha 6y agoNote that small noctuas are not magic, like other small fans they're noticeably louder than larger fans.numpad0 6y agoServers people are talking here are like 5cm thick and like 125W per CPU