Two pumps, one reservoir, one radiator, two blocks - what will happen?

WJA96

WJA96

WJA96

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I'm building a new passive system and it will definitely have an EK Supreme CPU block and an EVGA GTX200 HydroCopper 16 GPU block on a GTX280.

It will also use a single five-stick Konvekt-o-Matik to cool all of it.

Now, I have two reservoirs - the XSPC Dual DDC and a selection of 10W and 18W DDCs and a Typhoon III with a Laing D5 Vario in it.

The options available are;

Typhoon III and 1 loop
Typhoon III and two loops with the CPU on one loop and the GPU and radiator on the other
Typhoon III and two loops with the CPU and radiator on one loop and the GPU on the other

XSPC Dual DDC with one 18W DDC and 1 loop
XSPC Dual DDC with two 10W DDCs with the CPU on one loop and the GPU and radiator on the other
XSPC Dual DDC with two 10W DDCs with the CPU and radiator on one loop and the GPU on the other

I could also use two 18W DDCs but that seems like massive overkill to me.

My thought process is this - the Supreme really benefits from a high flow rate, so if I give it it's own mini-loop with a DDC it will be working optimally. As the reservoirs in both cases are shared, the water coming back from the radiator will be common to both and once equilibration has occurred, it won't matter.

Thoughts?
 
You say you want it to benefit from a high flow rate... splitting it into 2 loops like that is going to half the flow rate so negate any benefit your trying to gain.

Could be wrong here, but I dont see any potential benefit in doing any of the wierd loops you've suggested lol. I would either go for one loop or if you really wanted to keep temps down and have the room, go for dual loops but each with its own rad and res etc
 
Ducky Spud said:
You say you want it to benefit from a high flow rate... splitting it into 2 loops like that is going to half the flow rate so negate any benefit your trying to gain.
Click to expand...

How is having 2 loops with 2 pumps going to halve the flow rate?

Ducky Spud said:
Could be wrong here, but I dont see any potential benefit in doing any of the wierd loops you've suggested lol. I would either go for one loop or if you really wanted to keep temps down and have the room, go for dual loops but each with its own rad and res etc
Click to expand...

The DDC systems have two pumps - one for each loop, and it's passive using a MASSIVE passive radiator. There is no probolem with cooling capacity.

Are you familiar with the kit I'm talking about?

The Typhoon allows one pump to drive two loops and the XSPC top allows two pumps on two loops.
 
Also, I believe that the shorter CPU only loop on the Typhoon system will also have a higher flow rate as the loop is shorter per turn of the pump. But I'm quite open to challenge on that.
 
Right, I thought you were going to have the tubing come out then use a Y connector to split it into the 2 loops! My bad, sorry! If each loop uses its own pump then Im not sure haha,yea, makes it a bit more of an intresting concept :p
 
Been doing quite a lot for reading on the typhoon 3 - and skinnie and Martin comments on XS have been very telling.
Useing it for parrallel loops is not as straight forward as twin loops or series (but is realatively forgiving as skinnielab testing shows).

Loop order seams to be unimportant (as ever)
uneven heat load for each loop also seams ok (to a point)
But for optermal benifit the pressure drop of each loops should be simular.
So something like a supreme should be on it's own loop.
With almost everything else on the other, maybe even add a NB block to 'balance' the restriction.

Typhoon III and two loops with the CPU on one loop and the GPU and radiator on the other
Click to expand...
This should also be the quietest option.

Not seen anyone use a T3 with Rads in only one loop so you may see more temp variation across the loop that the normal 1c
It's would be all about the mixing - and may cause the cpu to get much hotter in the first 30-90 seconds than normal.
Might not be an issue - but if cpu is fully loaded on startup (and it a fast booting board -J&W etc) you may have first boot issues. Can't back that up with evidence, other them my own use of passive loops and folding (abet at lower flow rates)
Never could run my Q6600 at 100% untill the loop had warmed up (10min's) it would shoot up to +105c in seconds then shut down. After the ten minutes it would sit at 100% 92c all day long without issue - was a B3

Don't really know much about the xpsc with setups - overkill for anything I'd ever do so can't help there.
 
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It would be interesting to see 2 loops, one loop for the flow choking Supreme and other loop for the rest, using the T3.

edit: just try it out :) its half the fun!
 
WJA96 said:
My thought process is this - the Supreme really benefits from a high flow rate, so if I give it it's own mini-loop with a DDC it will be working optimally. As the reservoirs in both cases are shared, the water coming back from the radiator will be common to both and once equilibration has occurred, it won't matter.

Thoughts?
Click to expand...

This one.
 
I think the issue you're going to hit is trying to get the water to mix in the reservoir. There's a risk of the two loops running basically independently with very little heat transfer, and whichever doesn't have the radiator will cook.

If you can force the water to mix, then res -> ddc -> ek supreme -> res would be a good loop. If not, you're likely to be better off either using one 18W ddc or two 10W in series. I'd be interested in hearing what you have in mind for forcing the loops to mix.

I periodically decide that this with two pumps is the answer for dual loops and then decide I don't know any reasonable way to make it and shelve the idea again. I'd go with the left hand one personally. It would probably take a very long time to bleed. Reservoir/fill line can be removed when finally bled.

oqwwi1.jpg
 
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