Originally Posted by Destrto
How so? They arent meant to be placed anywhere the hoses will allow. Do not need to be bled, and never need maintenance. (obviously unless something happens thats not supposed to)
They are built to be no maintenance, so why would placement matter for air bubble purposes?
What just happen?! I think there is misunderstanding here. Let me explain. AIO (All-In-One) cooler can have tiny air bubbles trapped in it during assembly, at least mine have. Since it's sealed loop system, we can't bleeding it. So the air bubbles will always there. In this case, if radiator is placed below the pump, the air bubbles can transfer to pump & pump may make noise. This what I meant when I said better put radiator above the pump in my previous post. Sorry, I should make myself clear. On my H100, it does make a noise when the radiator is located below the pump. Not loud though. The noise go away when I put the radiator at the top of the case, where it should be. I don't know whether the pump can survive if I'm running it that way any longer.
So, this should clear things up.
Anyway, per-Corsair recommendation, in their manual & blogs, for dual 120/140mm radiator, is to be placed at the top of the case which basically above the pump & the tubes pointed downward. Even for single 120mm radiator, recommendation is to be placed at the back with the tubes at the bottom. I don't see any reason to do otherwise, unless there is a problem with the casing.