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WC with MORA3 outside, rig inside - how low below ambient before condensation risk?

 
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post #1 of 6 (permalink) Old 01-20-2020, 10:32 PM - Thread Starter
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WC with MORA3 outside, rig inside - how low below ambient before condensation risk?

I am planning to watercool a 9900K and RTX 2080Ti (or 3080) using an external rad such as Watercool's Mora3.

Now let's assume that I move to the UK Manchester where minimum temp in January is 2°C. Is there a way to get around condensation if my rig is inside with ambient room temp of 15°C?
Maybe lowering pump speed or using another type of tubing (if i use glass for example inside my rig) or foam make a difference?
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post #2 of 6 (permalink) Old 01-20-2020, 11:17 PM
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Why does the MORA3 need to be outside?

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post #3 of 6 (permalink) Old 01-20-2020, 11:19 PM
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Outside the house or just the case? Could be less noise if he doesn't want the radiator in the same room?
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post #4 of 6 (permalink) Old 01-20-2020, 11:44 PM
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Dangerous and counter-productive game you're playing that may end up with dead hardware. Condensation is not always immediately noticeable, and can form hidden under the CPU in the socket causing pin rot and/or fried mobos and CPUs(been there). Keeping the air moving helps by evaporating condensation quicker than it can pool up assuming the temp differential isn't too huge, which can save ya if you're 1-2* below from being off or something in your calculations but won't prevent it.

Technically, you can run a second rad INSIDE the room, and if outside temps drop below dew point you can turn on the fans on the internal rad, which will warm the coolant attempting to bring it back to room temp. That, along with pump control, would in theory allow you to stay above dew point with a few notable issues.

- Unpredictable. Outside temps can change quickly, and if temp drops quickly without you noticing to adjust the fans and pump, you will fry your rig
- Difficult. Condensation point is not always going to be the same, and can vary greatly. Not just the inside and outside temps need to be considered, but also the humidity inside your case. This would require a humidity probe inside your case, and you can then calculate current dew point using temp and humidity.
- Counter Productive. The real solution would be to insulate your board and just run it at its potential. Without a smart controller that constantly monitors and adjust for you, there is not a single safe way to run sub-ambient systems safely without insulating. Eventually you are gonna be too distracted playing a game before a cold front and end up only remembering to check by the computer crashing to a full shutdown...also been there.


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post #5 of 6 (permalink) Old 01-21-2020, 12:05 AM
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plate heatexchanger in between one of the radiators + another pump on that side?
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post #6 of 6 (permalink) Old 01-21-2020, 08:47 AM - Thread Starter
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Well, better to know before I do something that I would regret. Seems like humidity is a bigger issue than I originally thought - it is 85% in the UK, meaning dew point is quite high. Well cooling with a MoRa3 is anyways quiet anyway, but I was thinking wherether there is a way to go even lower just for another couple of MHz OC (you get it right?), hense i thought I would put the MoRa on the roof of the building. Seems like a bad idea.
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