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Can you put two pumps in a single loop?

post #1 of 8
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Hey guys, I recently finished my WC loop and I'm looking to add a gpu to it soon-ish.

It has an RX360 and EX240 with a Raystorm waterblock. Will be XSPC Rasa 750 be enough to push that at decent temps with a GPU/block such as the 690/7990 or 7970/680?

If not, is it possible to use two pumps in the same loop? Like this

res > Rasa pum > EX240 > DDC-1T pump >GPU >CPU>rx360>res
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post #2 of 8
In short, yes, you can add a pump into your loop.

Why not get a different res with a better pump? There are XSPC reservoirs that can take a D5 pump (such as the Swiftech MCP 655) mounted inside them, and would overall be less of a hassle than having 2 pumps in your loop.
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post #3 of 8
Martin has a good article about it here:
http://martinsliquidlab.org/2011/04/26/pump-setup-series-vs-parallel/

If using 2 pumps remember to disconnect the second pump on initial fill so it dosent run dry.
Edited by Krahe - 4/24/12 at 12:50am
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post #4 of 8
Thread Starter 
Quote:
Originally Posted by ChrisTahoe View Post

In short, yes, you can add a pump into your loop.
Why not get a different res with a better pump? There are XSPC reservoirs that can take a D5 pump (such as the Swiftech MCP 655) mounted inside them, and would overall be less of a hassle than having 2 pumps in your loop.

Simple solution, money. A MCP355 pump would cost me $50 shipped and that's it, another res and stuff would cost in excess of $100
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post #5 of 8
Yes, a DDC-1T pump and the RASA 750 pump are a good match.

If you place the DDC-1T before the 750 pump, then the flow is ideal.

If you opt to place a performance top on the DDC pump, then the 750 pump should go first and then the DDC-1T with the performance top.

The ideal setup with two pumps is simply this, the slower pump feeds the faster pump.

Also, since you have the RASA 750 pump, it's a good choice to add a DDC pump in the loop not only for flow with better head pressure, but as a caution on "when" the 750 pump will die. For some reason those 750 pumps are not reliable. I've had my share of people with the 750 pump grab a few pumps as backups from me.

Hope this helps
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post #6 of 8
Quote:
Originally Posted by bmaverick View Post

If you place the DDC-1T before the 750 pump, then the flow is ideal.

Wouldn't you need a second reservoir if you were to put a pump before the rasa kit 750 pump?

since that pump is also a reservoir, wouldn't it technically turn into something like

Stuff>ddc>res>rasa 750>other stuff
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post #7 of 8
Quote:
Originally Posted by Klinkey View Post

Simple solution, money. A MCP355 pump would cost me $50 shipped and that's it, another res and stuff would cost in excess of $100

i'd sugest that you save a few more dollars and get the 355 pump and bay res and add them when you do the GPU.

Are you a member of OCAU, Where is Oz are you?
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post #8 of 8
Quote:
Originally Posted by Peopie View Post

Wouldn't you need a second reservoir if you were to put a pump before the rasa kit 750 pump?
since that pump is also a reservoir, wouldn't it technically turn into something like
Stuff>ddc>res>rasa 750>other stuff

Nope. The other poster did state that the DDC needs to be turned off during the fill process of coolant. Once the loop is filled, then connecting the DDC is all it takes.

With the two pumps in the loop, Klinkey and easily upgrade without major adjustments needed. He already has his loop investment intact.

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