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Water cooling dual pumps necessary? - Page 2

post #11 of 12
I'm might be a bit late but you also want to look at the head pressure of the pump not just the flow rate, If the flow is good but the pressure is terrible the water will stop flowing at any sign of restriction.
And I also concur that radiators have hardly any restriction, you can add quite a few before you start stressing a pump out. The rad doesn't need to be all copper, most are brass/copper which is also fine.

You seem to be using some chinese parts, Another guy did a full loop with chinese components a while ago here: http://www.overclock.net/t/1369715/build-log-250-chinese-wc-cpu-gpu-loop-svs-white-ninja and as far as I know it turned out pretty good.
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post #12 of 12
As Stickeelion said, flowrate isn't nearly as important as head pressure when talking about maintaining flowrates. Typically radiators will not add resistance to a loop, as there is actually more surface area in the chambers of the radiator than there is in the G1/4 barb, or even 5/8 tubing for that matter. Typically ever part of your water cooling loop, except for occasionally water blocks, is optimized to have more surface area than the barbs, which will create very little flow restriction. When concerning flow rates/restriction the things you want to worry about is:

1: Which water blocks you are using, as some of them have LOTS of flow restriction.

2: The amount of tubing you are using,, as more tubing simply means more restriction as the pump is trying to fight gravity, and force liquid through turns and the such.
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