Parallel Loop with one Reservoir, good or bad ?

[emalf]

I got a EK BAY SPIN Reservoir, which has 3 outlet and one inlet. I am wondering what would it turn out if I use one outlet as inlet and make two loop feed from one reservoir instead of using a Y connector, which only use on inlet.

One loop for CPU with EK Supreme, 120*2 radiator and 18W DDC3.2

One loop for GPU with full cover block, 120 radiator and a less powerful pump (not decided yet, most likely a 10w DDC)

Given enough water to feed each loop, would it perform like two separate loop for flow rate and head pressure ? (I guess the temperature would not be the same)

On water temperature, I don't know if the difference would be even out in the reservoir.

The reason for considering this is that I put some silver in the reservoir but not in the tubing.

Or should I just run them in series ? or two separate loops with one in t-line

[Jamesrt2004]

hmm could work, but you have no way to properly regulate the water going out the res :/ imo if your looking at that, just get xspc dual ddc res, and have proper 2 loops

[SoulsCollective]

What you're looking for is called the Typhoon III, by Primochill. Using a reservoir to split a loop is almost always a bad idea, as you're going to run into all kinds of issues with balancing restriction, heat-dump, flow-rates, etc etc, unless the res you're using is specifically designed for it.

[p0Pe]

i would say the ddc dual res too. since you have a ddc 18W pump already (?) then no reason to get a typhoon III and another pump. you would get better performance with the xspc dual pump reservoir.

the option you mentions would work, but wouldnt be "great". better to get a small reservoir, and use that in the second loop.

[emalf]

I already have all the components I mentioned except for the second pump. I find that after two block and two radiators, the flow is quite slow.

Current setup is Pump -> 240 Rad -> EK Supreme (Most restrictive block ?) -> 120 Rad -> GPU Block -> Reservoir

I think adding a pump in series right after or after the 120 Rad would help the flow rate, but pumps in series is less efficient than two separate loop. But I am not quite sure the single 120 RAD would handle my old GPU with around 150w tdp. I don't want to change the rad as the space inside is not enough for another 240.

But I think I would try 2 separate loops first and see what happen.

[millertime359]

How are you measuring flow rate? What is your flowrate? You have a pump top on your pump?

What are those rads that you are using?

That EK Supreme is pretty restrictive, but still don't really have that massive of a loop.

[Otter]

Originally Posted by emalf

I got a EK BAY SPIN Reservoir, which has 3 outlet and one inlet. I am wondering what would it turn out if I use one outlet as inlet and make two loop feed from one reservoir instead of using a Y connector, which only use on inlet.

Because each loop has it's own pump, I doubt you'd have too much trouble with balancing the loops. However, using an outlet as an inlet might cause problems in the res. If you already have the res, you could try it and see, but watch out for churning and air entrianment.

Given enough water to feed each loop, would it perform like two separate loop for flow rate and head pressure ?

Not exactly, but close enough.

On water temperature, I don't know if the difference would be even out in the reservoir.

Depending on the design of the res, you might see a slight difference in the two outlet temps, but I think you'd have to design the res to prevent mixing if you wanted to build up a large differential.

[emalf]

Originally Posted by millertime359

How are you measuring flow rate? What is your flowrate? You have a pump top on your pump?

What are those rads that you are using?

That EK Supreme is pretty restrictive, but still don't really have that massive of a loop.

There is a spinner on it, it show how fast the flow is. But definitely not an accurate way for measuring flow rate. I have and Res Top for my DDC, so there are two reservoir in the loop.

Those two rad are from Syscooling.

Maybe I am worrying to much, as the flow still kicking bubbles in the reservoir. But this is also a know problem for the EK Spin RES, waterfall generates bubbles . I guess maybe I have two res and using the outlet away from the swirl which decrease the number of bubbles go into the loop. Most of the bubbles keep swirling in the EK spin res.

I have a Q6600 (OC: 410*8 @ 1.42v) which temperature (coretemp average of 4 cores) around 40 @ idle and 60 @ load. but the CPU probe I put on the CPU cover's edge give around 36~40 from Idle to load, water temperature in Reservoir is around 34 @ idle and 36~37 @load. 240Rad has 4 1800RPM FAN in push&pull, 120 Rad has one 2000RPM Fan in push config. Room temperature is around 26.

Besides, could I assume the head pressure drop almost to 0 in the reservoir ?

[millertime359]

That spinner is not accurate at all. I have seen a few complaints of that thing not spinning.

If you have a restop, just get rid of the EK res. You don't need 2 res's. Your temps are really not that bad.