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Running two different watercooling pumps?

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Mite be a dump question but i just wanted to know if it would be OK to run these two pumps together one after another.

Barrow SPG40A-S High Flow Water Pump 18W 1260L

EK-DDC 3.2 PWM 18 W
 
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well, in essence you are paring a DDC and a D5 pump, found this thread where there were some discussions and no clear answer if its safe, but it will not preform as good as two similar pumps.

the barrow has a 1260l/h rating, and the EK has 1000 l/h, so at full power and PWM you could get 1000 l/h with the pumps in series, head pressure will probably be better than one pump.

another possibility is to run them in parallel, but it will require you to fine tune the PWM settings for both pump to get a approximately equal head for best flow.

I think its a bit like the "SLI with different cards" thread here at TPU, possible with a little fiddling, and it can give good results. But just getting two similar ones will yield the best result.
 
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If you were considering running 2 pumps I'd suggest setting up two separate loops. When you've got a powerful graphics card or two in the loop it can heat it up to the point that your CPU temps are no better than you'd get with mediocre air cooling. If you have space for two separate 240mm rads you'd have great temps on both ;)
 
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