Hi Dave, hi everyone
Just adding my own two cents since I too have very recently bought this PSU, and just like you I'm hearing a buzz from it. I've just made this quick video to demonstrate it - it's almost IDENTICAL to the buzz demonstrated in the video Davemuk has linked to. The difference with mine is that it only seems to happen when my CPU is under heavy load. A stress test, any
stress test immediately sets it off. Adding to that, some days I don't notice it at all, and I didn't notice it for the first time until a few weeks after having it running. But I'm not sure if that's since it doesn't happen all of the time, or just since I don't notice it... because, in honesty, it is very
quiet. But it's just loud enough, in a PC that is otherwise practically silent, to get noticed - that's the problem. I think that in a gaming rig, for example, with a GPU going and a louder CPU cooler than mine, you'd just never know. But when you do notice it it's all you can hear afterwards.Here's my video*At about 1m 45 secs in you'll hear me click my mouse, starting AIDA64's stress test, and then you should be able to hear the buzz.
It goes for about 10 seconds, then I stop the test and it vanishes. You'll then hear me click my mouse button about every 5 - 10 secs after that, and you should be able to hear the buzz flicking on and off with it.
Mine came from Scan too, and I'm considering returning it for an exchange. I did read the review on here before buying, but it read like the issue had been fixed, and
I haven't looked for thhose bios settings yet. Honestly... I don't know if I can be bothered returning it if they're going to want all of the modular cables back too, now that they're all neatly tucked away inside my PC. I'm asking myself if I can put up with the buzz. My only other real concern is whether or not it's actually safe.*DISCLAIMER - Sorry, I know the video is a bit rubbish, and the 'home studio' is a tip, but at least I spared you the sight of the 'Animal from The Muppets' 'lounge pants' I'm wearing right now.