I had a custom computer built 4 or 5 years ago. The power supply is now going out. I really liked what I had as it was very quiet and when I loaded the computer, the fan came on. This was great. It would be quiet all the time but when I loaded the computer the fan came on for minimal amount of time. The power supply does not have a manufacturer or model number on it. What brand of power supplies does this. Because I sleep in the same room as the computer and the computer is on 24/7, quiet really helps. Any suggestions? Cost is no object.