SLI WC block connection: parallel vs series

R-TYPE

R-TYPE

R-TYPE

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10 Jan 2015
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Hi all, a noob question: I've seen watercooling link diagrams between SLI waterblock cards as having Parallel and Series links. Parallel seems to have two connections between the cards. Series has one connection between the cards.

What is the difference between the two connection diagrams?

Am planning a one loop SLI setup (ie RES>RAD>CPU>SLI>SLI>RAD>RES..) Will have a dual pump res.

Thanks :)
 
Just out of a technical interest, does the parallel method present more turbulence to the flow? With serial the water is contained and only has one route it can travel (hence the better flow).

With parallel the water presumably has to divide between the routes, half the water goes straight through the first connector block and on to the second card's connector block, and half goes down into the actual water block of the first card.

This strikes me as slightly counterintuitive. I understand parallel has lower flow rate, but how is a good clean flow maintained across the first water block itself given the split and the ability of the water to effectively bypass the first card?

Does that make sense?
 
Thanks a lot übersonic, yeah I get the diagram, I guess it was more that I couldn't picture how flow was maintained in the first block as adequately as if it were series

Despite the concern mentioned above about drainage, I am sort of interested in parallel, as the flow reduction may offset the fact that my loop will have three rads, two GPUs, and 5-6 QuickDisconnects which overall may be more restrictive than less.

To offset this the pump is dual d5 vario and the tubing is 1/2 3/4 inch (13mm/19mm) which apparently gives marginally better flow.
 
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