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HX620 Humm


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My HX620 has a kind of a mezzo soprano hum. It's not real squealy high but it's not a low tone either. I think it is likely the fan. When I first turn my computer on in the morning it is silent but after a few minutes it comes on and stays. It's a very consistent steady hum.


I've never owned a power supply that produced an actual tone (only rushing air without a pitch) so I've been trying to figure out exactly what this is. I found this youtube video on coil whine:

It definitely sounds NOTHING like that. It's not nearly that high or squeaky. Yikes! So if that's what coil whine sounds like this is not it. Also for any of you who have experienced whining CRT monitors, it's also lower tone than that, though just as steady and annoying. So I figured it's prob whine from the fan, but I've not found a video on that to compare it.


My understanding with this power supply is that the fan is controlled by load, not necessarily temp. I intentionally bought this psu because it's way more than my computer needs and therefore would never hit high loads. I heard it was silent below 300-400w so by all accounts I really shouldn't be hearing anything from it. I have two case fans, plus my CPU and GPU fan. However there is almost no discernible difference between the sound with everything running and all fans disconnected and only the PSU fan running. There is slightly less air sound but the rest of my fans seem pretty well silent.


I'm really hoping I can solve this by simply replacing the fan, but I'm not sure if any 120mm fan will do. I have a Scythe fan on the front of my case which is very very quiet but will it work in the power supply? I'm not sure about depth of the fan and also I heard it needs to be a 2 pin fan?

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  • Corsair Employee

If you prevent the fan from spinning at start up does the sound disappear? If so, then lets get the unit replaced. You can use the On Line RMA Request Form and we will be happy to replace it. Be sure to check the box that says “I've already spoken to Technical Support and/or RAM Guy.”


We could not recommend replacing the fan as that would invalidate the warranty on the PSU, but it is up to you.

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