I have these fans to be used to replace the worn out a Dreambox. Although the connectors are different, but the pitch is the same. The fan does its job inaudible (running mostly throttled via the internal fan control) and am quite happy so far. However, one negative to me is that the fan is running unimportant. Due to the relatively low mass of the fan, the vibrations transmitted not on 's case, but it is a sign of low quality. Let's see how long it will last. Greeting