Parallel loop for cpu/gpu loop?

[Nurf]

I'm upgrading my watercooling and with it I might be getting a d5 bay res with 2 inlets and 2 outlets, which got me thinking if a parallel loop would be in any way useful.
The plan would be to have one loop go only to the cpu and the other going through the gpu and 2 rads. This way I could make a clean build and the restriction difference in the loops shouldn't be too far apart because the gpu block's lower restriction compaired to the cpu block will be evened out by the low restriction rads. The res has inlets right next to each other meaning that the water will mix before entering the pump.
I'm going for a silent build and I was wondering if this would be a way of lowering total restriction and thus getting better flow while having the pump silent.
I'm thinking I'd give this a try if it makes atleast some sense, but I don't know if this will work the way I think it will. If you guys have any thoughts on this, please share them.

 

[tinytomlogan]

Series is the way to go mate.

end.

 

[NoPrisoners]

Having one loop for the whole computer is simpler, less tubing, etc. Makes it easier to get tidy, etc.

The series/parallel debate has been done a lot over various forums. Parallel loops provide little to no improvement in practice because our components don't produce enough heat to raise the water temperature significantly.

If you look at the temperature difference across the loop, in my case (see sig) I get < 0.5 C increase.

The main limitation will be the the radiator surface area. As the specific heat capacity of air is much lower than water, the more radiator surface area the better (until you get towards ambient room temps, then there's not much else you can do without a water chiller, etc). Water can absorb ~ 4x more energy per gram to raise it 1 C when compared with air.

In my case I am running the GPU blocks in parallel, but purely for practice reasons. It is easier to blank off the un-used ports in the 3-way SLI bridge.

 

[Nurf]

Tom not a fan of something that adds tubing. No suprize there
I don't think this is the same as a series/parallel gpu cooling debate. This isn't about water temp difference, but resistance. I keep my D5 below speed setting 3 and thats why I think flow is something to keep in mind (eg cpu block performance).
That being said, the more I think about it, the more I start to suspect that it won't make enough of a difference on needed pump speed/noise to justify that dreaded couple of cm extra tubing that this community is so much against.

 

[Cru]

mate i got my d5 on 3, its very quiet and got no issues with a cpu, 2x gpu and 3x rad loop.
just make one