Loudest component in water cooling?

[Albuquerque]

Loudest thing in my rig is the two 120mm fans pulling through the rad at ~9v, followed by the 7v 120mm fan in the back doing exhaust work, then my three hard drives. The pump is actually not silent, but it's such a very low-frequency hum that you really never hear it.

Until a little air bubble goes scooting through every once in a while. I'm redoing this loop, and it will NOW have a T in it so I can bleed it properly. I hate those damned bubbles

 

[WarriorII]

I miss my 45mm Deltas. *sniff*

Now those made some noise!

Definately the fan.

 

[ALiEN2953]

i have never noticed the pump in my rig MCP655 so definitely the fans.

ps reclaimer122 do you might if i put ur quote about using silver and so forth in ur rig in my sig?