Y Loop design (pics inside)

[Majin]

I am going to be buying some DD WC gear in a week or two; and I have been thinking about different ways to do my loop.

One of the ideas I though of was what I am calling a Y loop:

Pump >>> Y joint >>> CPU and GPU >>> Y joint >T joint (for fillport)>>> Rad >>> Pump.

It goes from the Pump, splits at the Y and one tube goes to CPU and one goes to GPU, then another Y brings them back together, a T allows for the fillport, then it feeds to the Dual RAD and back to the Pump.

Since the cool fluid from the RAD is cooling both the CPU and GPU at the same temp, rather than heating up from the CPU and then sending warmer fluid to the GPU.

Would this work better then a standard loop?



P.S. there are no pics, it was a trick to make you want to come in here

 

[Dark_fire]

as long as your pump has enough flow otherwise it will be a performance hit due to slow coolent flow

 

[Majin]

as long as your pump has enough flow otherwise it will be a performance hit due to slow coolent flow

Plan to use this DD D5 12v

So this would help cooling as long as the pump can do it, do it!

 

[somecallmeTim]

The only thing I would change would be to go from the Rad to the blocks. Although very low, the pump will add some heat to the water and by getting the coolest water to the blocks is the best thing you can do. Granted, it's not always easy to do it, and the temp increase may not even be measureable, that's the way I set up loops.

Dark_fire is right - you'll need a good flow rate when doing the "Y" - and I like the "Y" set up - I just can't see dumping the hot water off the CPU onto the GPU

Peace
Tim

 

[autobot]

Personally I would go with a standard series loop as parallel loops tend to distribute coolant unevenly. Remember, water always flows to the least path of resistance. If your running a high restriction CPU waterblock and a low restriction GPU block, the CPU block will end out getting less coolant running through it. This will lead to higher CPU temps. The only way to get even distribution to both the CPU and GPU waterblocks inj a parallal loop is to have 2 pumps. One pump going to each block. A good pump for this type of setup is the DangerDen CSP-Mag 12v pump as it is small, reasonably powerful and carries a decent price. With this setup your system would go as follows...

...............................................pump1 >> CPU
>> RAD >> t-line >> y-split >>..........................>> y-split >> RAD >>
...............................................pump2 >> GPU

 

[DarkenReaper57]

Personally I would go with a standard series loop as parallel loops tend to distribute coolant unevenly. Remember, water always flows to the least path of resistance. If your running a high restriction CPU waterblock and a low restriction GPU block, the CPU block will end out getting less coolant running through it. This will lead to higher CPU temps. The only way to get even distribution to both the CPU and GPU waterblocks inj a parallal loop is to have 2 pumps. One pump going to each block. A good pump for this type of setup is the DangerDen CSP-Mag 12v pump as it is small, reasonably powerful and carries a decent price. With this setup your system would go as follows...

...............................................pump1 >> CPU
>> RAD >> t-line >> y-split >>..........................>> y-split >> RAD >>
...............................................pump2 >> GPU

No disrespect here or anything, but you don't need 2 pumps to get an even distrobution of flow, but you do need some sort of method in controlling restriction in each line (i.e. valves). Flow meters are very useful in such applications

Majin, you will probably need to use two pumps to get adequate flow to each component, though. Even though your overall flow will increase, the flow in each branch will decrease because when you use a wye adapter, your movement of volume of water per unit time is split to each branch (this is technically defined as "flow" IIRC). That is, the water moves slower through each branch and speeds up again after the wye. Higher temperatures will result due to the loss of flow.

Also, your way of looking at things are also somewhat misleading. For your purpose, putting elements in series will probably work better and be simpler. The cpu will not heat up the water so quickly as to give the gpu "hotter" water. In fact, the change in coolant temperature in and out of a block is usually less than .3 C. The variation of the temperature in your room due to the time of day will have a larger impact on your temperatures than this.

Unless you are going all out, such as in the "parallel hex" worklog, I would suggest to stick with putting your components in series, or better yet, do 2 separate loops.

 

[Erasmus354]

It usually is not worth the effort. What you dont realize is how little the water temperature increases going through the CPU water block. The coolant temperature probably only increases by 0.5-1C tops.

 

[plywood99]

It usually is not worth the effort. What you dont realize is how little the water temperature increases going through the CPU water block. The coolant temperature probably only increases by 0.5-1C tops.

QFT.

You will more than likely not experience a benifit doing the Y loop. There are exceptions to this, such as running a high flow block and high restriction block together.

 

[BioPort]

when considering a loop like this, keep in mind that water always flows in the path of least resistance. which could result in decreased performance for either your cpu, or your gpu.

 

[Majin]

ahhhh, never thought of that.
The 2 pump idea seems good, but I don't feel like all that hassle.
I will just stick to the tride and true.

Thanks for the input.

 

[Majin]

Heres what I am going with now:

All from the DD site
TDX
TDX Accelerator Nozzle Set
D5 12v pump
Black Ice XtremeII Radiator
Fillport Reservoir W/ Blue Fillport
Acetal Version MAZE4GPU W/ OCZ Ram heatsinks
Tygon 3603 Tubing 1/2" x 10 feet
Polypropylene "T"
MCT-5 Non-Conductive Solution
Arctic Silver 5

Also, will I need to use a Thermal Adhesive to secure the OCZ ramsinks, or will AS5 do the job?

 

[plywood99]

The sinks come equipped with thermal tape, so you need nothing to apply them. Also best nozzle plate to use for your TDX is #4. Less retrictive than 5 and delivers same performance.

Enjoy your water cooled rig....

 

[Majin]

Plywood, you are the Man!
I was just going to ask that question!

Another Question.

Does higher flow rate from a larger AC pump, translate to better temps?
Or is it better to have a better RAD?

 

[plywood99]

Plywood, you are the Man!
I was just going to ask that question!

Another Question.

Does higher flow rate from a larger AC pump, translate to better temps?
Or is it better to have a better RAD?

Don't be fooled by the flow rates of ac powered pumps. Generally speaking those flow rates are at a low restriction, aka, head. The D5 you are getting will blow away just about all ac powered pumps. Unless you go for an Iwaki or panworld, but then you are talking big bucks.

Better rad or better pump depends on your setup. Being that you went with a extreme series rad, you would be better served by the kind of fans you put on it. A high static pressure fan will increase the airflow through the extreme rads. Look into the 38mm thick fans or maybe the Aerocool Extreme Turbine series, since high static pressure is a feature of these fans...

 

[Majin]

Being that you went with a extreme series rad, you would be better served by the kind of fans you put on it. A high static pressure fan will increase the airflow through the extreme rads..

Just bought a pair of 104CFM Panaflos for this rig