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-   -   Switching serial loop to parallel (http://www.hardwarecanucks.com/forum/water-cooling/57445-switching-serial-loop-parallel.html)

Mnemonicman October 22, 2012 02:33 PM

Switching serial loop to parallel
 
Figured I'd ask before I did something stupid or well more stupid. The plan is to connect the gpu and cpu in a parallel loop. That is the input and output goes to the gpu and then goes to the cpu. Will there be any issues getting flow to the cpu if it goes to the gpu first? Or do it the other way around and go cpu then gpu?

This is how it's setup right now. I plan to reinstall the original vrm and chipset heatsinks as the Koolance blocks restrict the flow too much and do not seem to help much for overclocking. And maybe turn the case 90 degrees and do something clever with the case mod.
http://i.imgur.com/OHBYRl.jpg

dandelioneater October 22, 2012 03:05 PM

As far as changing from serial to parallel goes, you probably won't have better temps by doing it. The water will heat up and reach equilibrium so it won't make much difference for temperatures with just the one video card there. If you have good flow and temps are good, I'd just keep it as is.
(my 2cents)

Mnemonicman October 22, 2012 03:54 PM

Temps are good but the flow is the issue. The motherboard blocks restricted the flow so much a second pump was required. So if i'm removing those blocks I thought i'd might as well try a parallel setup. If it doesn't work then I can change it back to a serial loop.

KaptCrunch October 22, 2012 07:06 PM

as you know that flow will travel the least resticted then doing a paralle loop

would need to check all block flows in to a bucket an calibrate them

also need manifolds

as other said its not worth the effort with cpu gpu loop

Mnemonicman October 22, 2012 09:17 PM

It is still something I would consider. But from what little I could find on the flow rate of the gpu block and the cpu block, you might be right about the parallel setup.
Won't find out until the 3-way splitters and tubing arrive from Dazmode later this week.
Then again best way to find out if something doesn't work is try it anyways and record the results. Science!

Chomie October 22, 2012 09:59 PM

As everyone is saying I think a series loop is a better option. The water will eventually reach equilibrium and the cooling rate is more dependent on the amount of dispersion of heat you can acquire (More Rads/Fans). Although here is another example of a parallel circuit.

http://imageshack.us/a/img100/1247/h...ledcloseup.jpg

It pretty much is a dual loop shared between the cpu and the gpu with a shared dual reservoir:

1) Waters pushed up into the big radiator
2) Out to the cpu
3) Into reservoir 2
4) Out and down to small radiator
5) Up and through GPU
6) Back and into reservoir 1

It becomes parallel inside the reservoir since the waters technically shared between reservoir 1 & 2.

A little to get your head wrapped around but it pretty much ensures that an equilibrium will be created between the CPU and GPU over time. It also happens to be my rig ;) But I like sharing ideas so here you go.

Mnemonicman October 23, 2012 06:32 AM

If I bought the dual D5 pump top instead of the serial dual D5 pump top I would totally do that. Though what I might try to do is turn the case 90 degrees and dremel out a spot for a dvd drive. Alright looks like I might stick with the serial loop. I got two 120mm radiators I could find spots for. Might help a bit.

Mnemonicman October 24, 2012 12:41 PM

Quote:

Originally Posted by Chomie (Post 665263)
As everyone is saying I think a series loop is a better option. The water will eventually reach equilibrium and the cooling rate is more dependent on the amount of dispersion of heat you can acquire (More Rads/Fans). Although here is another example of a parallel circuit.

http://imageshack.us/a/img100/1247/h...ledcloseup.jpg

It pretty much is a dual loop shared between the cpu and the gpu with a shared dual reservoir:

1) Waters pushed up into the big radiator
2) Out to the cpu
3) Into reservoir 2
4) Out and down to small radiator
5) Up and through GPU
6) Back and into reservoir 1

It becomes parallel inside the reservoir since the waters technically shared between reservoir 1 & 2.

A little to get your head wrapped around but it pretty much ensures that an equilibrium will be created between the CPU and GPU over time. It also happens to be my rig ;) But I like sharing ideas so here you go.

Sounds interesting. Ok here's an idea i'd like to get your opinion on. How about the pump goes to the radiator, then splits to the cpu and gpu, and both go back to the reservoir. If there needs to be more cooling performance I do have two 120mm rads to put in somewhere. I do like that setup of yours. If you can post a pic of it. I do try to get any inspiration if I can.

dustin1706 October 24, 2012 11:56 PM

Quote:

Originally Posted by Mnemonicman (Post 665841)
Sounds interesting. Ok here's an idea i'd like to get your opinion on. How about the pump goes to the radiator, then splits to the cpu and gpu, and both go back to the reservoir. If there needs to be more cooling performance I do have two 120mm rads to put in somewhere. I do like that setup of yours. If you can post a pic of it. I do try to get any inspiration if I can.

You never want to split unless you have the exact same restriction on both branches IE: identical video card blocks. The majority of the flow will go down the least restrictive branch. You really want to stick to a serial or dual loop system. I avoid the word parallel here because technically yes that picture is a parallel system from the reservoir, but it is more like 2 individual serial loops with a shared res.

I run 2 individual loops with a koolance rp-452x2. I used to run 3x crossfire which is why I initially set it up this way. You can't see the return from the lower rad to the reservoir because it is behind the drive bays and you can't see the hookups to the top rad, but each loop is Res-Pump-Blocks-Rad-Res. One pump runs the CPU/Mobo loop (red) and one pump runs the GPU loop (blue).

http://i103.photobucket.com/albums/m...0D-R4Epost.jpg

Mnemonicman October 26, 2012 07:44 PM

It has begun. Wish me luck. And no I'm not doing the parallel loop. Going to mount the res at the top of the case as bubbles are more likely to go there. And to keep an eye on coolant levels and so on.

Update: Good news everyone! It did not catch fire and is not leaking. The loop is simpler and should be easier to drain should something untoward happen. It is a bit louder now that the chipset heatsink is back. Nothing a good set of headphones can't cure. Flow did not seem to improve much. There is an improvement. Mostly around the cpu block but aside from that not much has changed. So now it is setup as res > pump > 240mm rad > gpu > cpu > 360mm rad > res.

Here's a pic. Sorry if it's dark and blurry. Cell phone camera is a bit wonky after the new rom.
http://i.imgur.com/chsEGl.jpg


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