Than you own brain cellsQuite funny , as I ' m currently studying to become a Technologist Seems to be a North American thing , google it if you ' d like , so we will be on the same level , at least in 2 years , once I ' ve finished . I also have a P 2 PSU from EVGA , the 850 . ECO mode is on , makes noise nonetheless . Could it be I received a bad unit that had coil whine ? Possibly . I could post proof if you ' d like . So , not only am I not full of shit , but the PSU does add to the noise . If it was on in all three tests though , I guess one can factor it out . and it shows in their quality controlFunny , my Maximus 8 Hero got it $ 70 off , don ' t judge has been through hell and back . Dropped multiple times , no visible damage , so that can show how well built it is on the outside . It sustains a 4 . 8 GHz OC on my 6700 K while my Gigabyte Z 170 X Gaming 7 could not , and actually has a decent BIOS . Guess their motherboards haven ' t dropped . Also , resorting to insults ? Not very professional , I would have expected better from someone that holds a job similar to what mine will be .