Help plz the fan on my sons psu has started to run really loud and making a vibrating noise only started over the past few week, used to be really quiet ( evga g2 1000w 80 plus) can this be fixed or does he need a new psu, if needing a new one does it have to be a g2 ? also is a 1000w psu overkill for his pc ? what would be the lowest watt he would need if needing a new psu specs msi gaming 5 mobo msi gtx 970 gpu, i7-4770k cpu, Corsair H100i w,cooler, 16 gb Corsair vengeance, 2x250 ssd 2x1tb HD any advice would be appreciated as don’t really know much about this type of stuff, thanks