Hello. I got my new pc like 2 weeks ago and lately after using the computer for more than 7 hours or so I hear the psu struggling,making a weird noise.The noise is either constant or periodic but it is definitely coming from the psu.The psu is a corsair 600w builder series v2 , including i7-5820k,msi x99 sli plus,corsair 8gb ddr4 2400mhz,msi gtx 970 4g,samsung 120gb evo,wd 1tb black. Is there something I should worry about?Why is my psu making such a noise? I appreciate your help