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Swiftech H220 Pump Speeds and Fan Swap

post #1 of 3
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Has anyone played with the h220 pumps speeds. I seem to get the best, coolest temps when set to the min setting. I am not running a loop yet just the h220 cooling my cpu with the Helix fans. Makes sense though, the slower the pump speed the longer the coolant stays in the rad with the fans cooling makes for cooler coolant going to the cpu block. Also, has anyone put different fans on the h220,I seen some reviews that the Notcua NF-F12s work pretty good on the h220.If anyone has some input to this post please let me know what you think...
post #2 of 3
I have a MCP-655 pump in my loop with a variable speed knob, i notice NO temperature difference from when im running the pump at max to minimum, i cant remember right off the top of my head but i think at minimum it runs at 800rpm and max is like 3,000 rpm. So i would agree with you, pump speed has very little effect on temperatures, so i run mine at minimum because its quieter.
Super quiet
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Super quiet
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post #3 of 3
That isn't really how it works. Water does not need any specific time inside a water block or radiator to pick up heat. While ever there is water inside any heat exchanger it is absorbing heat.

In Radiators in particular because they have a much larger internal surface area, the higher the water flow rate the more efficient the radiator is.
If water is flowing through a radiator slowly its temperature might be 10C above ambient when it enters but only 5C above ambient when it leaves (just random numbers).
Any object dissipates more heat energy the higher it is above ambient. So the above radiator is dissipating say 300W at the start of the rad but by the time it gets to the end it is only half the degrees above ambient it was at the start so it is only dissipating 150W. The result of that is the total heat energy dissipated to the airflow is the average of the starting value and the end value.
If on the other hand the water is moving very fast and can only cool down to 9C by the time it exits then the heat energy dissipated is higher because it is the average of the start value of 300W and the exit value of 270W
Its a little counter intuitive but the fact is you want the rad to be as hot as the water can make it as possible. The higher the flow rate, the better. Those numbers are a little exaggerated but that is how the effect works.

The same thing is true of water blocks, just on a much smaller and shortened scale, and in the reverse. All testing available will show that once flow rate is high enough for the water temp to change as little as possible entering and exiting a water block the heat absorbed, and the temps achieved will plateau.
Edited by Jakusonfire - 8/6/13 at 4:17am
Kusanagi
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Kusanagi
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Samsung 840 Pro 256GB X2 EK Supremacy Aqua Computer Aquaero 6 Pro Aqua Computer D5 USB 
CoolingCoolingCoolingCooling
Aquacomputer MPS 400 flow meter EK-CoolStream PE 360 EK-Coolstream PE 240 Noiseblocker Eloop B12-PS 
CoolingCoolingCoolingCooling
EK Vardar F2 EK-FC Titan Acetal & Nickel EK-RAM Monarch X4 Clean CSQ - Acetal+Nickel EK-D5 X-RES 140 CSQ 
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