Stay away from EVGA G3 power supplies with ECO mode. These things have a weird aggressive fan control mode. It sounds like a hairdryer when it comes on in ECO mode. If you leave it off of ECO mode they are okay but still a little noisy. I'm not sure if you are trying to build a silent pc or anything of that nature. Just my 2 cents on them. Seasonic or Corsairs are silent compared to the G3s.
Correction is loud in both settings. This is the loudest PSU I have ever seen for no reason. I bought a larger 850 watt to stop the fans from coming on. This thing spins up loud in both modes. Big thumbs down on this thing.