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post #1 of 7 (permalink) Old 04-20-2019, 12:06 PM - Thread Starter
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Radiator surface enough ?

Since no reply in watercoooling club thread ,im asking here :

I have a Phanteks P600s case with 2x Phanteks 140SP fan on min rpm(400) on front intake , and one 140SP on back as exhaust . CPU([email protected],1) + VGA(1080TI @1987mhz) on water , radiator is external Mo-Ra3 420 with 9x Noctua NF A14pwm fan (300 rpm).
Dual D5 pump in series.

I also have a 420*45mm Alphacool rad somewhere collecting dust Shall i add that 420 rad in front of my P600s case ,or i wont get any benefit from it ? Or even make things worse ? ( I think 140sp fans on low rpm dont have the power to pull air through/flow across dustfilter+45mm thick rad ,trapping the heat inside the case )

So Mo-Ra alone or add the +420 rad ? Thanks
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post #2 of 7 (permalink) Old 04-20-2019, 12:10 PM
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Yea i think that is plenty of cooling for your setup.If u need more cooling u can
just turn up your fan speed a bit. I never seen that Rad before. Its pretty bad ass !!
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post #3 of 7 (permalink) Old 04-23-2019, 11:12 AM
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I also use a MO-RA 420 Pro an although I keep toying with the idea of adding a second one to the loop, it works so well as it is (cooling an 7940X @ 4.8Ghz all cores + 1080Ti Highly OCed) that it only comes down to doing it for the sake of doing it...lol

I will get a second MO-RA sometime in the future but besides the RAD I will need an extra pump and res (running 2X D5s now) + 9 more fans for it so the cost rises quite a lot for not much to be gained performance wise. One thing is for sure though, If I add a second RAD, during the summer I will have no need to spin my 9X Corsair ML140Pros higher than 500rpm anymore..

So the benefit will be total silence and a lot less dust. The second unit should be running passively (fans off) except when gaming or doing CPU intensive work (i.e. rendering).

Now in your case, I would add the RAD and test it but bear in mind that you might need to increase pump speed to maintain your flow rate.

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post #4 of 7 (permalink) Old 04-23-2019, 11:22 AM
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More rad surface = less fan and even pumps speed and noise. Sometime the flow rate won't make huge difference in temps but adds more noise to it so more radiators will always run your system quieter and might be even cooler. You can tweak your pumps and fans to run at optimum speeds to archive silent's, yet good performance
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post #5 of 7 (permalink) Old 04-23-2019, 12:11 PM
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Quote: Originally Posted by NewUser16 View Post
More rad surface = less fan and even pumps speed and noise. Sometime the flow rate won't make huge difference in temps but adds more noise to it so more radiators will always run your system quieter and might be even cooler. You can tweak your pumps and fans to run at optimum speeds to archive silent's, yet good performance
Because I have placed my RAD above my PC on a shelf on the wall the pumps need to work harder that is why I went with 2X D5s (Dual EK volute) so that I can run them at 40-50%. One pump would need to run higher causing some noise vibration. I want complete silence and above 50% the pumps become the noisiest part in my build (not noisy but I can hear them). When I game it does not matter even if they go 70% since game sounds are louder. But while working I have them at 40%.

I intend to test a second MO-RA in the loop in the future but this experiment would cost over 600 Euros for rad (stainless steel pro) + D5 + an extra Heatkiller Tube for the second rad + 9 X 140mm Fans so I do not know if it is worth it just for not running fans at higher speed in the summer only when gaming (still quieter than game sounds).

The problem is that I have now become so accustomed to extreme silence with this build when I am working (fans at 450rpm) that "normal" sound levels are bothering me more than the average person.. Where I live is also very quiet...nature sounds mostly.

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post #6 of 7 (permalink) Old 04-23-2019, 12:17 PM
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2 x 120mm rad surface for each component.

-Guide to 1st Case Modding for Better GPU(s) Performance/Cooling-
https://www.overclock.net/case-mod-wo...ing-guide
-Guide to 2nd Case Modding for Better GPU(s) Performance/Cooling-
https://www.overclock.net/case-mod-wo...e-fan-mod
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post #7 of 7 (permalink) Old 04-26-2019, 10:18 AM - Thread Starter
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Thanks all for advices .
I decided to sell my 420 rad and use the mora420 only . If my temps go higher at summer , i just add an extra 20cm fan on other side of the rad for push/pull.
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