GPU parallel loop question.

[IhazHedont]

Hey,

 

I wanna go for a parallel gpu config, and I got a question whether or not it would work properly:

 

1st GPU inlet => 1st GPU outlets => 2nd GPU inlets => 2nd GPU outlet to radiator, 2nd GPU oulet to drain system.

 

I check the benefits from this kind of config, but I wanna know if the drain system won't be a problem.

 

I think it won't because it will create an "ultimate" resistance for the water, which means it will go threw the other outlet that goes to the radiator, but I don't have infused science so ...

 

Any help ? =)

 

PS: Both GPUs have the same block.

[MrKickkiller]

Little schematic plz?

 

As I understand it, you are concerned about the stagnant water from the second gpu outlet to your (hopefully) closed drain system?

 

@IhazHedont : Follow your topics

[IhazHedont]

Here is a scheme:

 

 

And your question is right, I wonder if the drain system won't be too much restrictive for the loop. Unfortunatly, my second GPU is my lowest organ in the system, that's why I want to drain from here.

[DirkW]

@IhazHedont

 

Unless I'm missing something on first glance, a loop like that wouldn't work well at all. The water would just rush straight through on the right side (least resistance) and not go through the blocks to cool the GPUs at all.

 

You'd have to move the top outlet on GPU #1 to the left port, so the water has to go through the block to get out, not just pass straight through the ports. And when you use 2 identical GPU blocks (otherwise don't even bother with parallel!), resistance should be be equal, and water should "divide up" and each half go through one particular block before exiting.

[IhazHedont]

Yes you're right, the plug should be on the right, and the inlet should be on the left.

 

Is it correct now ?

 

 

Also, do you have any comment regarding the drain ?

 

Edit:

My idea would be to have this with the drain system on the left outlet of the #2 GPU, is it possible ?

 

[DirkW]

Should work, yes.

 

But are you sure the GPU is the lowest part of the loop (not only counting the obvious components like blocks, res, pump and rad but also of the whole tubing, etc.)? In my loop the lowest part is actually a section of tubing - and I put a T-connection in there, with one end being a dead end with a valve (and an additional plug just to be safe).

[IhazHedont]

Unfortunatly yes ... I got a Corsair Air 540.

 

During my first build, I set my front radiator upside down to get the lowest point on it. But in this case, the HDD brackets was really, really a problem, and I couldn't fit any drain.

 

I set the radiator position back, therefore my second CGU is the lowest point.

 

Thanks for the advice anyway.

[Everendless]

Just for info, the blocks I bought for my cards have an In and Out on the ports. Mine are Alphacool m02, which are not exactly full face cover blocks, and may flow differently than yours. I set them up in parallel like your saying, directly after I put the waterblocks on for the first time. Bought the extra fittings to put it in parallel, it looked awesome and the flow was great. After 5 seconds on a Aida GPU stability test, the cards got to 80c.

In conclusion, extra flow does nothing without suction. I thought I put the waterblocks on horribly. But after setting it up with only one flow through the gpus, I am hitting 45c over clocked.

[IhazHedont]

Thanks for the input.

 

I have 2 EK FC Titan, and according to EK user manual, all ports can be used as inlets or outlets.

 

Then I believe this setup is fine right ? =)

[IhazHedont]

Last question: does the drain need a particular orientation ?

 

I mean, if I just put a male/male adapter in the #2 GPU, and fit the drain instead of using a male/female + 90° adapter, then I fit the drain, is it ok ?

[AnonymousGuy]

Drain orientation doesn't matter as long as it's either horizontal or pointing down.

 

Make sure you have an air port at the highest point of your loop.  Air has to replace the water that's draining out or else it won't drain properly.  Easiest thing is to have a T fitting that's capped off.

[IhazHedont]

Drain orientation doesn't matter as long as it's either horizontal or pointing down.

 

Make sure you have an air port at the highest point of your loop.  Air has to replace the water that's draining out or else it won't drain properly.  Easiest thing is to have a T fitting that's capped off.

 

Okay thanks, my highest point is actually my first radiator. I always open it when I've to drain.

I might buy this system very soon, I'll post some photos.