H75 Pump buzz/whine

Hey guys, I've recently bought a Corsair H75 from PC Case Gear, and the pump seems to be buzzing and whining all the time, I've tried moving the pump and radiator around but the annoying buzz is still present. The buzz isn't extremely loud like a HDD seek but its a constant buzz that's just loud enough for it to be extremely annoying, especially since the rest of my system is silent.

can someone help me out please? :confused:





Thanks,

Phenomanator53