Mine's a simple unRaid free version. I just needed something to becakup my home data to and i used all old drives i had laying around. It sits across the room from my core i7 at my desk and i can't hear it at all.
http://www.newegg.com/Product/Product.aspx?Item=N82E16811154087
http://www.newegg.com/Product/Product.aspx?Item=N82E16819103688&cm_re=athlon_240-_-19-103-688-_-Product
Underclocked to 1 GHz to consume less power with the poor PSU.
http://www.newegg.com/Product/Product.aspx?Item=N82E16813128342&Tpk=gigabyte%20740g
It fits three drives (1 TB, 1 640, 1 160 (soon to be replaced with another TB)). I also modified a rear case PCI slot exhaust fan to intake cold air and blow straight on the 1 TB parity drive. In my room, it averages around 25 degrees C.
