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Two 90's and a 45 in my GPU loop, will it work?

post #1 of 25
Thread Starter 
I want My GPU loop to consist of a OCZ pump that does 500L/hr, bay reservoir, a XSPC dual 120 radiator, and a block for a 4870. I would like to use two 90 degree fittings with the curved turn, not the sharp turn, and one 45 degree fitting. I don't plan on overclocking but will a set up like this impede flow to the point of being ineffective compared to cooling on air?
Thanks for any help you guys can offer!
Here's the build if you want to check it out:
http://www.overclock.net/case-mod-wo...-jrhudson.html
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post #2 of 25
90* fittings will hurt flow. 45* fittings aren't as bad.
post #3 of 25
You should be just fine.
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post #4 of 25
No, a single 90 degree won't have much of an impact, and 45s are generally preferred if possible from what I know (if they reduce tubing and such, or make fitting easier).

I have two 90s, and three 45s in my loop with an MCP655 and while it might affect temps mildly (I don't know, it was so much easier to use 90's I didn't bother trying to fit otherwise) it's still crazy better than air.

I think the only thing to avoid is the cheap hardware store 90 fittings, which are really restrictive, a good bitspower (or other brand) fitting build for WC will do fine.
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post #5 of 25
Anyone with experience with OP's pump? I don't, I know my MCP655 doesn't have any problems with 90s and 45s, but it's a very strong pump too...

OP, I'd go out on a limb and say that 1 or 2 won't be the end of the world.
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post #6 of 25
I have two 90 degree fittings too and my temps are just fine in my opinion....see my sig rig. Max on my cpu is 61C and never get above 58C on either of my gpus.
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post #7 of 25
IIRC somebody over on XS tested this - bottom line, it doesn't make a big difference unless you've got dozens in your loop.
post #8 of 25
Thread Starter 
Hey all,
I just want to say real quick that I really appreciate all of you for taking the time to respond and so quickly. I have been using this forum for awhile now but I never take for granted the helpful and polite attitudes all of you exercise.
Now this question is more for others benefit then mine:
What if performance and overclocking is my goal? Would this setup still be appropriate?
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Phenom ii x6 1090t @4.2 NB@3.0 Asus Crosshair IV Formula X2 Gigabyte 6970's 2X4GB G.Skill Flares 
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OS-Patriot 256GB SSD, Game drive Corsair 128GB SSD Windows 7 64bit Razor lycos Corsair 1000watt 
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CPUMotherboardGraphicsRAM
Phenom ii x6 1090t @4.2 NB@3.0 Asus Crosshair IV Formula X2 Gigabyte 6970's 2X4GB G.Skill Flares 
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post #9 of 25
Quote:
Originally Posted by subtec View Post
IIRC somebody over on XS tested this - bottom line, it doesn't make a big difference unless you've got dozens in your loop.
Martin at Skinnee Labs tested and found that a single 90 = 4' of 1/2 ID tubing in terms of restriction. That can be interpreted by everyone in their own way, to some that's alot, others not alot.

Quote:
Originally Posted by JRHudson View Post
Hey all,
I just want to say real quick that I really appreciate all of you for taking the time to respond and so quickly. I have been using this forum for awhile now but I never take for granted the helpful and polite attitudes all of you exercise.
Now this question is more for others benefit then mine:
What if performance and overclocking is my goal? Would this setup still be appropriate?
We're happy to help, thanks for stopping by!
This setup for a Phenom and a 4870 is probably ok, but you may want to consider moving to a 240 + 240 / 320 / 480 if you add more cards. Pump may also want an upgrade but as I said earlier, I have little (no) experience with these pumps and their longevity/capability.
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AC Mk-800 Cobra
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post #10 of 25
It will effect the flow rate naturally but nothing serious. If you want to keep the looks go for it. Below is a detailed explanation and basically you need to use 30 fittings so make a 1C temperature difference

http://www.xtremesystems.org/forums/....php?p=4727171
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