CPU+crossfire water cooling question

[daftVader]

I'm about to embark on my first water cooling project, and can't wait!
I have a question about the best way to do it though. The components in the loop will be an FX60, an X1900XT and an X1900XT-X. I've decided to use Swiftech's new Apex kit (Apogee block) and two of their MCW60 gpu blocks.

The question is, should i hook them up to be CPU-GPU-GPU, or use 'Y' splitters to keep the GPU blocks on a separate line as it were. Er... something like this:
xxxxxxxxxx-----CPU------
Pump---<xxxxxxxxxxxxxxxx>---Rad
xxxxxxxxxx--GPU---GPU--

(sorry about all the 'x's, just pretend they're not there. Tried using spaces but the form took them all out and left justified everything)

Anybody got any advice?
Thanks!

 

[Marci]

Pump > Rad > CPU > GPU1 > GPU2 > Res > Pump

No Y Splitters. Parallel flow = halving flowrate = halving velocity = halving turbulence = massively reduced performance.

 

[Bundles]

Couldn't have put it better myself.

 

[iraiguana]

^^ best advice.

 

[daftVader]

Thanks for that Makes lots of sense.

Just after I posted I found this http://www.wc101.com/articles/vs/
I might do their test with a bucket before I hook it all up so see for myself what the difference really is. Since the new swiftech stuff is supposed to be less restrictive I think what you've said will be spot on.

Cheers!