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Old October 17, 2007, 10:07 AM
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I am new to water cooling and I am just wondering why most people seem to be going for 1/2" over 3/8" or even 7/16ths tubing for water cooling is there that much of a difference in temps or installing?
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Old October 17, 2007, 10:43 AM
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To put it simply. Greater volume of coolant you can run to your blocks... the greater the heat transfer.

Think of it this way. I spray you with a squirt gun on a hot summer day. Your cool on that one spot but the rest of your body is boiling. I now spray you with a hose, and your wet nearly all over and your cooler. odd but simple analogy.

So in respects to what your asking. 1/2 allows for you to remove more heat via the coolant. more coolant more heat transfer.

As for temp difference, I have always used 1/2 so I can;t say for sure on the temp difference. In the end I believe it comes down to the amount of heat your system puts out. If you put out less heat you should have the similar temp results.
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Old October 17, 2007, 10:50 AM
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3/8" tubing allows for tighter bends too.
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Old October 17, 2007, 10:51 AM
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thats true... but nothing some coiled wire can't solve
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Old October 17, 2007, 11:22 AM
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Hasn't it been proven else where that it really doesn't matter?
The water is consistently flowing and thus constantly removing the heat.
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Old October 17, 2007, 12:11 PM
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Quote:
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thats true... but nothing some coiled wire can't solve
Yup, those Smartcoils do make a difference.
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Old October 17, 2007, 12:12 PM
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the flow never changes.. what ever the pump pushes out will always remain the same. No change to the pump output if the volume increases... I have heard of trials done to prove and disprove the theory. and they may have found a difference of a few degrees. However this is text book material.
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Old October 17, 2007, 12:57 PM
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Larger diameter tubing offers slightly less resistance to flow, and a higher flowrate can translate into better cooling performance. On the other hand, the vast majority of restriction in a water system comes from the blocks, not the tubing. Also, the cooling performance in modern watercooling systems plateaus very quickly above the 1 gallon/min mark, so the actual gains are often rather small.
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Old October 17, 2007, 01:08 PM
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Quote:
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Larger diameter tubing offers slightly less resistance to flow, and a higher flowrate can translate into better cooling performance. On the other hand, the vast majority of restriction in a water system comes from the blocks, not the tubing. Also, the cooling performance in modern watercooling systems plateaus very quickly above the 1 gallon/min mark, so the actual gains are often rather small.
well said.
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Old October 17, 2007, 01:12 PM
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3/8" tubing will not yield even a 1C increase in CPU temperatures. It's definitely not enough to call it a difference imo. You will not notice 1/2" vs. 3/8" in every day usage, and you probably don't have the tools to notice it through benchmarking.
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