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A Matter of Tubing/Barb Relations..

Poll Results: Which size tubing should I get?

 
  • 0% (0)
    8mm
  • 66% (2)
    3/8"
  • 0% (0)
    10mm
  • 33% (1)
    7/16"
3 Total Votes  
post #1 of 9
Thread Starter 
I have begun the process of setting up my first water cooling rig (computer has been built for months, but air cooled). I am looking at an XSPC Raystorm 750 RS 240 Kit, as well as an unbranded universal GPU block for kicks and giggles. I am mostly using this as a learning opportunity, and I'm not looking for advise pointing me in the direction of a $500 setup. I want this to be somewhat challenging, so that I can learn from the experience.

GPU Block

Sinks

I have already ordered the GPU block (and some RAM heat sinks) so it would arrive about the same time as everything else (coming from HK). However, the block has 10mm barbs, and the Raystorm kit has 1/2 inch (12.7mm) barbs. The kit comes with 7/16 tubing. My question is, will the 7/16 tubing fit both barbs securely, or should I order something smaller to compensate for the 10mm barbs on the GPU block? I have already purchased some adjustable metal clamps from autozone, and I had figured that that would be enough to make a secure connection. However, 7/16 is actually larger than 10mm (11.1mm), and after thinking about it, that almost definitely won't work. So, should I buy some 3/8 tubing and use hot water to fit it on to the 1/2 inch barbs? Or go even smaller and get 8mm?

Also, is there a way to mount the radiator inside the case and fans outside? There is only 1 1/2" clearance between the 2 120mm fan mounts and the RAM, and only one or the other would fit.

Any response is welcome, however I will not change my budget, and I won't pay the $25 I spent on the GPU block to return it. Thanks for reading, and thanks in advance for responding.
Edited by Jacob Milliman - 5/22/13 at 7:17pm
post #2 of 9
7/16 x 5/8 for looks and great flow (cheap), 1/2 x 3/4 for thick and imo ugly but the most flow (more expensive). You'd probably see little to no difference in temps between the two sizes though.
post #3 of 9
I would see if the barbs on the GPU block are removeable. If they are and happen to be the G1/4 threading you could just replace with barbs of your desired tubing size. That is going to be your best bet.

If that is not possible then you could get crafty with tubing conversion accessories. Something from here that suits what you need - http://www.frozencpu.com/cat/l3/g30/c427/s459/list/p1/Liquid_Cooling-Fittings-Reducers-Reducer-Couplers-Page1.html

Now please don't take this the wrong way, you said you wanted this to be a lesson for the next time. I think the biggest lesson to be learned is figure out all of what you are buying before you buy anything. Especially when it comes to liquid cooling. Also on top of that if you are going to be liquid cooling you cant be willing to cut corners. You have to remember this is water flowing over a whole bunch of stuff that hates water. One leak and it could be all over. The last thing you want is to loose $1000.00 + in hardware because you cheaped out on something. You may want to reconsider your stance, call your $25.00 GPU block a small loss and get something that is made to do the job. Get the fittings that are made for the tubing and the tubing that is made for the fitting. If you can get into water cooling and only have made a $25.00 mistake you are better off than most the guys on here.

This would be what I would recommend for your GPU.
http://www.frozencpu.com/products/15874/ex-blc-1107/XSPC_RayStorm_High_Performance_Acetal_Universal_GPU_Liquid_Cooling_Block.html

If there is anything else I can help you with or more questions you need answered pm me and I would be more than happy to help.
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LiquidGlass
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post #4 of 9
Thread Starter 
Thanks a lot for the link. Honestly, I'm not willing to spend another $60 to get 1 or 2 degrees cooler on my GPU because it is just a 7850. Thats why I went so cheap on that block (I guess I should have explained that in my first post). Sometime in the near future I'll be getting a 7950/70 and I'll get a full block for that. However, I will spend a couple of bucks on two of those couplers. I could even snag some 8mm tube scraps from work, so no money spent there. Again, thanks for the link and the help.
post #5 of 9
Thread Starter 
Quote:
Originally Posted by TheLawIX View Post

7/16 x 5/8 for looks and great flow (cheap), 1/2 x 3/4 for thick and imo ugly but the most flow (more expensive). You'd probably see little to no difference in temps between the two sizes though.

I really was more concerned with the actual fittings rather than a few cents an 1% variance in performance. I have a mid tower case, though, so I doubt 1/2" would work well at all.
post #6 of 9
7/16 tubing works great on 1/2 inch barbs, you just need to warm up the tubing with some hot water and it will slide over. I have used it that way without any clamps for short periods.

I would be concerned about using tubing that is too wide on the 3/8 barbs. You may need to get a short section of 3/8 tube and a couple of 3/8 fittings and use both types in the loop.

For example, connect the 3/8 tubing to the GPU block and put a 3/8 fitting on the CPU block. Then a 1/2 inch fitting on the other side of the CPU block and use the 7/16 tubing to connect to the next component.
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post #7 of 9
Thread Starter 
What I ended up doing was getting 2x 1/2 inch to 3/8 inch coupler reducers, and I'm planning on running 7/16 for the entire system except for a few inches in front of the GPU, which will be 3/8 tubing. I'll also use clamps on all connections just to be sure.

My other question never really got answered. Is it possible/efficient to install a radiator inside of the case with fans adjacent outside? Or should I put both the Rad and the fans outside (Kit comes with brackets)? And does using more tubing like that place significant strain on the pump? Thanks.
post #8 of 9
If you mean there will be mesh in between the rad and the fans then yes it will effect it. It takes an enormous length of tubing to cause any problems for modern water cooling pumps. To equal the restriction of a water block takes many feet of tubing so no you don't have to worry about that.

I would just cut the mesh out of the way and put rads and fans where they look neatest.
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post #9 of 9
Personally I would go 3/8" ID and 5/8" OD tubing, It's thicker so you won't see the cooland as well (in clear tubes) but it allows for much better bending as it won't kink as easily. however it looks like you should go with whatever fits on the barbs you have.
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