New Custom Loop using external Radiators & Fans

Chinez · 27 Aug 2025 at 09:26

Hi Overclockers UK,

I am looking to build a custom water cooling loop for my existing PC, which includes the following components:

MSI X870E Carbon WiFi
Gainward Phantom 5090
Delidded 7950X3D

I'm currently renovating an external outhouse, and due to the heat generated by my PC, I'm interested in setting up a complete custom loop. However, I'd like to utilize external radiators mounted outside and cladded over for discretion.

A few questions:

What fans would be best suited for this setup?
What radiators have people used successfully in similar external configurations?
Will I need extra pumps to handle the longer runs?

I'm considering using insulated copper pipework for the outdoor sections, then switching to quick connects once inside the property.

Additionally, would it be possible to use antifreeze in the coolant? If so, do you have any recommendations for types or mixtures that others have used effectively?

To combat condensation during the winter months, I'm thinking of incorporating some form of pipe heating system to slightly raise the pipe temperature and reduce moisture buildup.

Any help, advice, or recommendations would be greatly appreciated!

Chinez · 7 Sep 2025 at 12:34

@pastymuncher Thank you for the feedback , I only just see that there was reply on this thread as its quite a unusual thing to do.
So to me this all sounds great , I think I'm going to use cooper pipe to go through the walls and then use plastic for the build.

Also the idea of using a small box mounted on the external wall (to deflect rain and harsh weather sounds like a plan).

I will keep this thread updated as I make the build

Chinez · 7 Sep 2025 at 12:36

Chinez said:
@pastymuncher Thank you for the feedback , I only just see that there was reply on this thread as its quite a unusual thing to do.
So to me this all sounds great , I think I'm going to use cooper pipe to go through the walls and then use plastic for the build.

Also the idea of using a small box mounted on the external wall (to deflect rain and harsh weather sounds like a plan).

I will keep this thread updated as I make the build

@Mcnumpty2323 I take it with the pump locations I would have to do 1 pushing it out the wall and then 1 pushing it back in?

Sorry I have never ever done a custom watercool loop before :eek:

Chinez · 7 Sep 2025 at 13:08

Would this be a effective loop , or would it be best to keep them separate?

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