I've had my HX1050 for a little over a year now and I haven't had any problems with it until recently. The power supply fan will on occasion make a buzzing sound and it appears to not be related to anything else in the system. This sound has occurred while the system is idle, gaming, and browsing the web so it's not as if it only happens when a spike in power occurs. The sound can start and stop while doing any of these activities as well. All the rails are within ATX power specifications so I would not assume that that is the issue at hand. If anyone has an idea of what the issue may be that would be most helpful. If you think I need a new PSU, I would ask that you recommend one rated for 24/7 use as I prefer not to turn off my computers. Thank you for any help in advance!