Oh man I just got my order of 5 l1a's from casemod.com and I have to say that these things are GREAT. I'm using 3 as case fans, 1 on my slk-900 and 1 in my power supply. I have 4 of them hooked up to my rheobus and they're so quiet. Now, the loudest thing in my case is the stupid vantec iceberq on my northbridge. Thats how quiet it is. My old system included 3 smart fans and a tornado 92mm fan. That should give you guys an idea the contrast I'm hearing.