Loud PSU

[isaac22701]

My power supply has been getting unusually loud. For a while it has been making a quiet grinding noise whenever the computer is on. 

The psu is a Corsair cx 750M. I originally had it mounted upside down, but after the pc had been under full load for around 20 minutes, the fan got unbearably loud to the point where there is definitely a problem. It sounds almost as if there is sand in the bearings grinding. When I flipped it to fan side up, I still get the grinding sound, but not nearly as loud. The case is a p400s on a desk, so airflow is likely not the issue. 

I know the most oblivious solution is to RMA it, but I don't want to do that unless I have to since it is my only power supply. 

[LienusLateTips]

CX green has always been loud

[Senzelian]

The only other way I see (apart from an RMA) is to open the the PSU up and replace the fan, but no one here will recommend you doing that.
Not only could you kill the PSU, the PSU could also kill you. So talk to Corsair and get a new one is what I would do.

[VolkA]

9 minutes ago, isaac22701 said:

My power supply has been getting unusually loud. For a while it has been making a quiet grinding noise whenever the computer is on. 

The psu is a Corsair cx 750M. I originally had it mounted upside down, but after the pc had been under full load for around 20 minutes, the fan got unbearably loud to the point where there is definitely a problem. It sounds almost as if there is sand in the bearings grinding. When I flipped it to fan side up, I still get the grinding sound, but not nearly as loud. The case is a p400s on a desk, so airflow is likely not the issue. 

I know the most oblivious solution is to RMA it, but I don't want to do that unless I have to since it is my only power supply. 

Either RMA it or get a headphone to block the sound out.

[Energycore]

Ye it sounds like your fan bearing has died on you. If you're still under warranty, Corsair does cover fan dying in it and you can get an RMA.