Mounting radiator horizontal with tubes pointing upwards?(Closed loop)

AddRAM said:

That can`t be true because the pump on an AIO is on top of the cpu, and many people have put the radiator in the front or on the bottom well below the pump.

Persoanlly, I like the PSU at the bottom, fan facing down, and the radiator at the top, if you have video cards that blow hot air into the case, then having the radiator in the front would be the best option.

More accurately, pump even when together with body of CPU cooler, should be below top level of liquid so it's always immersed. If it's higher than that, air bubble will form in it.

ThrashZone said:

Hi,
A clc can be mounted in any place the lines are long enough to accommodate otherwise they would be shorter to limit mounting :)

If a system had that much air in it that unit would be a defect
rma most have 5 year warranty you have nothing to loose by mounting it where you can
Front would be best if it can be mounted like that but again it makes no difference :)

Due to liquid heat expansion it would blow up or leak if filled up 100%,there's about 5% or more of empty space in the loop. For open custom loops 10% is recommended.

dave2575 said:

Sorry but that's not correct, an aio's radiator and hoses can be mounted in any position: horizontally on Top or bottom w/hoses upward, or vertically in front or the rear w/hoses orientated on top or bottom, they can even be mounted sideways. The same is true for the pump: horizontal, vertically, sideways, inverted, upside down. And it makes no difference how the pump and radiator/hoses are orientated to each other. Its all good bro.

It was just a question of radiator position at the bottom of the case, not about hoses. Idea is to have a pump lower than top fluid level so it doesn't end up in air pocket, that's all.

"It was just a question of radiator position at the bottom of the case, not about hoses"

[Quote OP] "does anyone know if its any downsides by placing a radiator horizontal, with the tubes pointing upwards?"

The placement of the radiator (horizontal) and hoses (pointing upward) is not ideal.. but if thats the only place you can mount it.. there shouldn't be an issue with an air bubble stopping the pump from priming the system.