Water cooling: placement of radiator

jimhoyle

Honorable
Dec 7, 2013
16
0
10,510
I have a cabinet where I have my PC tower (Fractal Design Define R4). I need to have the computer inside a cabinet due to interior design and noise isolation reasons. The cabinet has an open slot in the front for air intake and a 120 mm fan hole in the top back for blowing air out. This rig worked perfectly with only air fans until upgrades in the computer making more hot.

I still need to keep everything inside the cabinet, there is no other way. So I am thinking about water cooling (I'm a newbie with that). I checked out some basic tutorials. Now, some questions:

Is it a working idea to place a water cooler radiator at the back top hole, INSIDE the cabinet? Is this going to significantly improve the thermal transfer, ie. is the air coming out of the cabinet going to be hotter this way? It is not possible to raise the exhaust fan RPM, beacuse that will create unacceptable noise.

If the previous idea will not bring any improvement to the temperatures, there is one other place for the radiator. It is 7,5 feet (230 cm) away from the cabinet, under a counter top. I could hide the radiator there. Is this length for tubing alright? However, there is also another problem: for visual reasons I can't bring the radiator away from the counter top. So basically I want to install the radiator under a table alongside with the table. Meaning there is not much for the radiator to suck air from (maybe I can make a very small socket between the table and the radiator. Is this a hopeless idea? So the radiator fan would blow downwards and exhaust air would basically mix with the intake air, although at the same time the hot air would dissipate in the room, in theory.
 
Solution


If the radiator and it's accompanying fans have access to decent airflow and cool air, then yes, put it under the table. What you would be better doing is placing the radiator where the cool air enters the cabinet you've got the case crammed in to. If you cannot provide decent, cool air to the radiator then it will not work. Period.
What you need is more airflow. You can put all the radiators in the world inside that case, but if there isn't enough air flowing through it then you are still going to end up with a 100°c box of broken parts. You can always sort out some silent fans to reduce the noise levels, that will allow you to cut more airflow management holes.
 

jimhoyle

Honorable
Dec 7, 2013
16
0
10,510
Due to interior decoration reasons I can't cut more holes. Also the back of the cabinet is against stone stairs and the upper part is already a hole, so it's not possible to add holes at the back. So, will the exhaust air be hotter if I place a water cooler radiator right at the back top hole? Or is it a reasonable solution to hide a radiator under a table, just slightly separated from the table bottom?
 


If the radiator and it's accompanying fans have access to decent airflow and cool air, then yes, put it under the table. What you would be better doing is placing the radiator where the cool air enters the cabinet you've got the case crammed in to. If you cannot provide decent, cool air to the radiator then it will not work. Period.
 
Solution

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