AIO pump position = loud noise and little buzz

[Turtle Rig]

Ok so my pump / block is set in a way where the tubes go directly up from a downward position up to the radiator up top.  Can this be causing the annoying noise the pump makes like a Jet landing.  It makes buzzing noise and a fridge sound.  I turn off all my fans ,,,, only thing working or moving is the pump and its loud as fak!  Can the positioning be wrong.  the tubes are facing the video card and go straight up to the rad up top.  Should the tubes be facing side ways thus the Corsair sign is straight ?

[Origami Cactus]

The tubes should be at the bottom/side of the radiator, if they are at the top then air bubbles can form, because aio's are sometimes not 100% filled. So try to rotate your radiator and see if that fixes it,

[SolarNova]

If its a recently put together loop, the churning/buzzing sound are likely micro bubbles.

Cycle the pump low rpm to high rpm over the course of a day or 2 (so run it at low rpm for an hour, then high rpm for an hour, turn it of, turn it on again and so on) and it should work out all the air. Make sure to pop the top of ur rez every now and then to help allow the air to more around.

My pump for example can sound incredibly noisy when a rogue bubble goes through the pump, but once its gone its damn near silient even on setting 5 which is the D5 vario's max settings.