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Loop presure issues

post #1 of 13
Thread Starter 
First I should say I have a Swiftech MCP655 pump with variable speed adjust. When this pump began it's life in my build it only provided flow to the CPU (XSPC Raystorm) and one GTX680 (XSPC Razor full cover) block, one 240 Rad & one 180mm rad both are pretty thin rads. Then I addind a second GPU, same type GPU block and didn't "notice" any pressure changes. Next I built another case up with the same components but I had to add a lot more fittings because I changed the radiators out for a large 420 Rad. I think that's when the flow started to suffer a bit but I'm positive. Then I added another 420 rad. That's when I started to notice the flow issues. I recently added an EK RAM block. Now I really have issues. The flow is so weak that I can see the air bubbles trying to escape out the Bitspower aqua pipe inside the res. but it's weak and just barely does that. Also I can see inside through the clear plexi on the EK block that it is not full and there is air trapped in there that can't escape. I don't feel that the pump is bad because I tested the flow by just making a loop through the rads and it blows water through them like a garden hose.

With all that said, should I go for a dual pump config or a dual loop config separating between the graphics cards and CPU/ RAM and using one rad for each loop? Anyone have any experience like this and how did you solve it?
    
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post #2 of 13
Dual pump top, dual loop is a PITA. So just to get it straight, you have 2 rads, 1 cpu, 2 gpu's and a ram block...sorry it's just hard to understand what you have. Maybe you're pump is at the end of it's life. Ever run it dry? even for a second...
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post #3 of 13
Thread Starter 
Who here has never run a pump dry for a second. It shouldn't be at the end of life either. I thought these pumps had a five year warranty. This pump can't be two years old yet. Yes, I have two 420 radiators, an EK RAM block for 6 DIMMs, Two GPU blocks, and a CPU block. I have a Bitspower 150 res.

So you recommend a dual pump? That's seems to be the least expense solution a the moment but I have been leary. I don't understand how two pumps in the same loop work because in my mind the slowest performer is going to dictate the flow and maybe even regulate the pressure. A lot of people use these setups so I guess they know more than I do about how well it works and the difference it makes.
    
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post #4 of 13
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post #5 of 13
Quote:
Originally Posted by Wasupwitdat1 View Post

Who here has never run a pump dry for a second. It shouldn't be at the end of life either. I thought these pumps had a five year warranty. This pump can't be two years old yet. Yes, I have two 420 radiators, an EK RAM block for 6 DIMMs, Two GPU blocks, and a CPU block. I have a Bitspower 150 res.

So you recommend a dual pump? That's seems to be the least expense solution a the moment but I have been leary. I don't understand how two pumps in the same loop work because in my mind the slowest performer is going to dictate the flow and maybe even regulate the pressure. A lot of people use these setups so I guess they know more than I do about how well it works and the difference it makes.

I've never run my pumps dry.

http://martinsliquidlab.org/2011/04/26/pump-setup-series-vs-parallel/

This should help you understand dual pumps....because knowledge is power biggrin.gif
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post #6 of 13
Quote:
Originally Posted by Wasupwitdat1 View Post


That is beautiful.....thumb.gif
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post #7 of 13
Quote:
Originally Posted by huhh View Post

That is beautiful.....thumb.gif

Agreed. Gorgeous!
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post #8 of 13
Thread Starter 
Thank you for your comments and the link. I read through the link real quick and it seems that he was just disputing the differences between parallel and series pumps but a lot more comment about parallel. So I would conclude that series pumps does provide more pressure, which seems to be what I need. If you look at the RAM block in the picture I posted @ the top section of block you can see the fluid level. Also if you look in the res @ the aqua pipe, @ the tip of the pipe you can see the air bubbles trying to escape. That shows how weak the flow is.
    
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post #9 of 13
Quote:
Originally Posted by Wasupwitdat1 View Post

Thank you for your comments and the link. I read through the link real quick and it seems that he was just disputing the differences between parallel and series pumps but a lot more comment about parallel. So I would conclude that series pumps does provide more pressure, which seems to be what I need. If you look at the RAM block in the picture I posted @ the top section of block you can see the fluid level. Also if you look in the res @ the aqua pipe, @ the tip of the pipe you can see the air bubbles trying to escape. That shows how weak the flow is.

It will allow you to maintain head pressure which seams to be what you need.
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post #10 of 13
Thread Starter 
Thank you very much. I will order the stuff I need Monday. I guess I need to figure out how I going to mount a dual pump and configure my tubing routing now. I was thinking of trying some of the new Primochill rigid acrylic tubing but everyone has seem to have run out of stock on my choice of clear. Maybe I'll go for the green.
    
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