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3/8 vs 1/2 Tubing

post #1 of 13
Thread Starter 
So 3/8 tubing vs 1/2.

If i'm using one of these for cooling the CPU alone, will there be any REAL negatives to using 3/8 tubing? I'm talking more than a 1-2C difference.

Possibly getting a motherboard block in the future.
Edited by KOBALT - 2/1/10 at 4:39am
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post #2 of 13
From what ive seen, no it wont make any noticable difference.
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post #3 of 13
that's a good question. i would think that there would not be to much of a difference as your pump is what runs the loop, smaller tubing = faster flow of liquid whereas thicker tubing = slower flow but at the end there will be equal amounts of coolant entering your block at the same time. the thinner will be a faster but thinner flow of liquid whereas the thinker will be a slower but thicker flow, probably both proportional to the tubing thickness. I do stand to be corrected but that's my thoughts.
post #4 of 13
Thread Starter 
its gonna be used with my Heatkiller, danger den ddc-12v pump and feser xchanger 240.

I just bought 3/8 tubing and all the required fittings. i'd hate to have a huge impact for doing so.

But i'm prob gonna be adding a nb/sb block to my mobo.
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post #5 of 13
Having smaller tubing just increases resistance to flow. In smaller loops there will likely be no perceivable difference. If you have a decent pump you'll be fine.
Having wider tubing probably allows you to have a slightly longer loop.
post #6 of 13
Thread Starter 
here's my Danger Den pump specs:

* Motor design: Electronically commutated, brushless DC, spherical motor Voltage Range: 8 to 13.2 VDC
* 9 VDC required to start
* Motor rated at: 18W
* Quiet operations at ~31dBA
* Maximum system pressure: 21.75psi, 150 kPa (1.5 bar)
* Temperature range: Up to 140F (60C)
* Acceptable media: Domestic hot water, water/Glycol mixtures and other media on request.
* Corrosion resistant
* Warning: Do not run pump with out fluid.

Wasn't sure about the pros/cons of different size tubing. I could just see the extremists raggin' on me for using 3/8" line on a HeatKiller...lol

I'm prob gonna get the EVGA HydroCopper mobo block.
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post #7 of 13
The flow difference between 3/8 and 1/2 is negligible. I prefer 3/8 because it makes a tight seal around the barbs. I use a heat gun to get the tubing warm, so it I can push it over and then it molds to the barbs. Then I use hose clamps as extra insurance against leaks.
post #8 of 13
Thread Starter 
Perhaps sometime in the near future, ill conduct a test using different sized tubing on the same cpu block and pump to compare.

Maybe ill try a couple blocks since there's different restrictions on some. i got like 3 on hand.
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post #9 of 13
Usually if you have a very large loop - ie; 25ft of hosing, 3/8 ID is a little better since it allows for the same amount of flow with a higher head pressure.

But, usually, the difference in negligible.
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post #10 of 13
Thread Starter 
Quote:
Originally Posted by rpm666 View Post
Usually if you have a very large loop - ie; 25ft of hosing, 3/8 ID is a little better since it allows for the same amount of flow with a higher head pressure.

But, usually, the difference in negligible.
Thanks. Even with my next upgrade, my loop shouldn't be more than 7 ft.

Thanks, all for your replies.

+REP for all!
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