psu My PSU sounds like a lawn mower!
2 minutes ago, thegadgetlad said:NZXT S340, ASUS DUAL GTX 1060 6GB OC.
The noise doesn't sound like a rattle, more of a humming sound like a lawn mower. Sometimes it sounds like it's revving up and down, like someone moving their foot on an accelerator pedal. It's also very very loud, to the point where the PC is unusable.
Try push the bearing down on the fans - case fans and all. Case fans on an nzxt case are not that good. Try using an overclocking programme to max speed the cpu fan and gpu fan and then put the gpu fan on idle (off) ... Then try flip over the power supply and make sure no cables and touching any fans etc.If that does not work. Carefully remove the grill from the power supply and with your finger give the fan a spin and see if you can see any contact with metal or cable- then try to gently sway the case from side to side and try then. Also please tell me if it starts instantly or when the computer has warmed up ( may be making this sound due to expanding of metal once pc has warmed up. Finally see if the GPU is touching anything e.g. a wireless network card. If you could please a take a couple pictures of the inside of your computer... Otherwise seek warranty advice. If I can think of more solutions I will tell you.