[SOLVED] Question about AIO pump orientation on the CPU

[jhferry]

Hi guys, Im installing an AIO on an AM5 7950x. I noticed a lot of youtubers are installing with the hoses towards the ram side (right side of the CPU) instead of below the CPU (or bottom). This is even in vendor install videos. Anyone know why?

I always mounted the hoses at 6 o'clock but the AMD folks seem to be mounting with the hoses at 3 o'clock.

 

[Lutfij]

Make and model of the AIO being used in the build? Please include the make and model of your case as well.

 

[jhferry]

Make and model of the AIO being used in the build? Please include the make and model of your case as well.

Lian Li Lancool 216
CPU Ryzen 7950X
Mobo: ASUS ROG Strix X670E-E
Cooler: Deepcool LS720

 

[Lutfij]

If you have the tubes exit the side where the rams slots are located, you get a longer tub length at your disposal, if you mount the cooler to the front or if you decide to orient the radiator such that it's mounted to the top with barbs exiting the front end of the chassis. The other reason can be for aesthetics. The last reason that does come to mind is that the pump and chamber design haven't changed much in the past decade or so since AIO's came to be and as such they were also oriented such as to avoid air locks in the pump chamber as there can be cavitation if the air isn't removed from said pump/block, then is the matter of permeation.

Mounting it with the hoses exiting the bottom of the pump/block module can and will prevent any and/or all air from escaping the pump/block chamber which will result in cavitation and or sub optimal temps or worse.

 

[jhferry]

If you have the tubes exit the side where the rams slots are located, you get a longer tub length at your disposal, if you mount the cooler to the front or if you decide to orient the radiator such that it's mounted to the top with barbs exiting the front end of the chassis. The other reason can be for aesthetics. The last reason that does come to mind is that the pump and chamber design haven't changed much in the past decade or so since AIO's came to be and as such they were also oriented such as to avoid air locks in the pump chamber as there can be cavitation if the air isn't removed from said pump/block, then is the matter of permeation.

Mounting it with the hoses exiting the bottom of the pump/block module can and will prevent any and/or all air from escaping the pump/block chamber which will result in cavitation and or sub optimal temps or worse.

I am mounting the rad on top with the hoses dropping down from the front of the case. I tried to have the rad in reverse but its too close to the rear fan. So basically, "Mounting it with the hoses exiting the bottom of the pump/block module" is the bottom of the CPU/6 oclock, correct?

 

[Phaaze88]

"Mounting it with the hoses exiting the bottom of the pump/block module" is the bottom of the CPU/6 oclock, correct?

There's nothing correct about it, as it doesn't matter.
It could be an aesthetic thing(to avoid upside-down or sideways cpu block logo), or they heard something from somebody, who heard something from somebody, etc, and the actual reason for doing it was completely lost.
What matters is what part is the highest point of the cooling loop.

If the radiator is at the top, hose alignment doesn't matter and neither does the pump - except with units that have their pump integrated in the radiator; top installation is a no-no for those.

Front radiator, hoses running along the top: if the pump lasts long enough, the user will start to hear noise at the top of the rad, caused by the increased air volume collecting there. Nothing alarming, just annoying.
The user will then be forced to flip the rad around(if it even fits) or move the rad to the roof(again, if it fits). 360mm and larger can be inconvenient for front installations because of this; imagine someone with a Lancool II Mesh, and their front mounted 360mm has starting making noise.
They can't do a top mount, because 240mm is the limit up there, and they might not be able to flip the rad at the front, because the cooler's hoses aren't long enough, or a large gpu is in the way.

Front radiator, hoses running along the bottom: nothing to really complain about this one.

 

[jhferry]

There's nothing correct about it, as it doesn't matter.
It could be an aesthetic thing(to avoid upside-down or sideways cpu block logo), or they heard something from somebody, who heard something from somebody, etc, and the actual reason for doing it was completely lost.
What matters is what part is the highest point of the cooling loop.

If the radiator is at the top, hose alignment doesn't matter and neither does the pump - except with units that have their pump integrated in the radiator; top installation is a no-no for those.

Front radiator, hoses running along the top: if the pump lasts long enough, the user will start to hear noise at the top of the rad, caused by the increased air volume collecting there. Nothing alarming, just annoying.
The user will then be forced to flip the rad around(if it even fits) or move the rad to the roof(again, if it fits). 360mm and larger can be inconvenient for front installations because of this; imagine someone with a Lancool II Mesh, and their front mounted 360mm has starting making noise.
They can't do a top mount, because 240mm is the limit up there, and they might not be able to flip the rad at the front, because the cooler's hoses aren't long enough, or a large gpu is in the way.

Front radiator, hoses running along the bottom: nothing to really complain about this one.

Thanks for the clarification! I have to move the rad around to fit the 140mm rear fan in there anyway. I wouldnt have thought that would get in the way.