Xilence (pronounced "ex-eye-lence") may be a brand that you do not recognise, but rest assured that we have fully evaluated their products & we are more than happy not only with the product quality but also, (and sometimes more importantly), the noise levels. The Red Wing fans represent not only excellent value for your money but they also look great in their black & red colour scheme. The bearings used in the Red Wing fans are hydro bearings, which produce very low vibrational noise. Each fan is supplied with mounting screws & can be powered by a 3-pin motherboard socket or a spare 4-pin Molex connector.