Please help-pulling hair out

andybird123 said:
you dont need to move both pumps, you just need to change the piping so that the "out" from the res combo goes to the "in" of the 2nd pump
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Would that really make that much of a difference, tbh ive drained my loop and tried to sort things out that much, my rig has been down more than up, getting really boring now lol, if you know what I mean.

Other than that I do not know how I could change my loop so it improves flow ?
 
DataVampire said:
Would that really make that much of a difference, tbh ive drained my loop and tried to sort things out that much, my rig has been down more than up, getting really boring now lol, if you know what I mean.

Other than that I do not know how I could change my loop so it improves flow ?
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IF it is purely the restrictiveness of the rads then putting them in parallel should fix that, however I don't think that is the problem - the fact you are getting no benefit from running a 2nd pump means there is something directly related to how the pumps are connected up that is causing the problem

if you turn off one of the pumps, what is the reading then? does one of the pumps being off cause more of a drop than the other?
 
andybird123 said:
IF it is purely the restrictiveness of the rads then putting them in parallel should fix that, however I don't think that is the problem - the fact you are getting no benefit from running a 2nd pump means there is something directly related to how the pumps are connected up that is causing the problem

if you turn off one of the pumps, what is the reading then? does one of the pumps being off cause more of a drop than the other?
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both equal amounts, in other words if I turn one of the pumps off, the flow rate is cut in half
 
Rads - did you mean GTS?
The gtx's arent crossflow but looking at your pics i can only see one connection to the top rad

I would check the direction on the mobo block as the pics i can find seem to show the top connector as the out but your pics / loop order desc show you using the top connector as in

What is the actual reading with one pump running? With both pumps connected but only one running it should only be marginally less than the 130odd you were getting with one pump
 
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andybird123 said:
Rads - did you mean GTS?
The gtx's arent crossflow but looking at your pics i can only see one connection to the top rad

I would check the direction on the mobo block as the pics i can find seem to show the top connector as the out but your pics / loop order desc show you using the top connector as in

What is the actual reading with one pump running? With both pumps connected but only one running it should only be marginally less than the 130odd you were getting with one pump
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hi thank you for the reply.

The out from the top rad, is going to the mob block. the in fromt he top rad, goes to the back of the case all the way down to the pump.

With one pump running its only 69.5 lpg, no matter which pump is on or off. with both connected its 139 lph.

Now before I added the second pump one pump was at 139 lph.

I think im going to do one final drain. im going to check I have put the jet plate in correctly.

All these years I have been doing watercooling I have never ancountered this problem before.

While I am at it I think I might take apart both pumps and double check those also.

From what I can read about my both rads. it doesn't matter what I use for the in and out ports the same for the motherboard block.

EDIT : and sorry both rads are defo gtxs
 
I have worked out 2 more possible loop possibilities :

Pump/res combo-out>d5/pump-in>d5/pump-out>Cpu-in>Cpu-out>Mobo-in>mobo-out>480 rad-in>480 rad-out>flow meter-in>flow meter-out>360 rad-in>360 rad-out>Pump/res combo-in

or

Pump/res combo-out>d5/pump-in>d5/pump-out>flow meter-in>flow meter-out>Cpu-in>Cpu-out>Mobo-in>mobo-out>480 rad-in>480 rad-out>360 rad-in>360 rad-out>Pump/res combo-in
 
I've heard that the Nemesis are very restrictive rads, and the fact that you have that much component makes me think that you might be pushing the limit of D5 pumps?

I would suggest getting more powerful pumps or removing components instead of changing the loop order as your reading seems normal (70lph for 1 and 140lph for 2)
 
deFiniLoGy said:
I've heard that the Nemesis are very restrictive rads, and the fact that you have that much component makes me think that you might be pushing the limit of D5 pumps?

I would suggest getting more powerful pumps or removing components instead of changing the loop order as your reading seems normal (70lph for 1 and 140lph for 2)
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the thing is before I added the second d5 vario I was getting 139 lph with just one d5 vario.

I know I have got 2 rads but that is because I will be adding perhaps a 980gtx to the loop after xmas.

I mean surely x2 d5 varios shoud be bale to handle what im asking it to ?

thank you for the replies
 
Syrellaris said:
2x D5's is plenty and even so you still should be fine with 1x D5.. the most Laing D5(swiftech, EK etc) all have a pump rate of up to 1500 L/h.
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AS I understand things(correct me if I am wrong) pump rate means nothing, especially in a restrictive loop. isn't head pressure more important ?.

x2 d5s should be enough but something is badly wrong here.
I know I defiantly checked the ports are paired correctly.

Something that might help diagnose my problem, I just thought of it.

i do not know if it is relevant but here goes anyhow.

When i drain my loop. i have to take the res cap off after i have opend the drainport valve for the water to start pouring out. now from the cpu-out port onwards the water rushes out. but.the water hangs on the port in of the cpu and i have to do case acrobatics to drain the top part.

Does that alone prove the restriction of my loop is from the 480 rad-out>motherboard-in>motherboard -out ect ect.

Perhaps try to redo my loop without trying to wc my motherboard(ie the cross chiller block).

The reason why im mentioning it. if i had a fairly non restrictive loop when i go to drain my loop most of the water should just come out ?.

What you guys think about that ?


Btw thank you very much for the replies in trying to help me sort this problem
Am i on the right track or just grasping at straws so to speak.
 
DataVampire said:
i am only getting 151-lph. before adding the new pump into the loop i was getting 137-lph.
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That's perfectly normal, running pumps in series stacks their pressure but doesn't really effect their flow rate, unless the extra pressure allows them to overcome restriction that was crippling a single pump. By comparison parallel pumps work the opposite way (doubling flow rate without having much effect on pressure).

On the plus side, it looks to me like you're worrying a lot about nothing as 33 GPH is (unless morning ness has addled my brain) 0.55 GPM, which is fine for any basic to moderate loop (the difference between 0.5 GPM and 1.0 is slightly over 1c per 100w of heat in the loop).
 
A pump getting less than 10% of its rated maximum is a big restriction
Looking at pq curves for single and dual d5's he should be getting more, unless something in his loop is a very serious restriction, my guess would be the motherboard block

DV; that does change things slightly, before I thought you said you had 139 before and after, if you are getting a small improvement with two pumps then I would suggest the motherboard block is the biggest restriction, rather than the rads

Still doesnt explain why you are then getting a massive drop to 80 with one pump running unless youve somehow connected the pumps in parallel by accident

Having said that. 55gpm is fine, and if it is the mobo block keeping it low adding a gpu block will make little to no difference
 
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The radiators take nearly 1psi of pumping pressure each.

That's much higher then the 0.15-0.25psi other radiators of the same size from other brands cause.

HWLabs radiators are brutal for flow rate and 2 of them in the same loop can consume nearly 50% of a loops pumping power.
 
almighty15 said:
The radiators take nearly 1psi of pumping pressure each.

That's much higher then the 0.15-0.25psi other radiators of the same size from other brands cause.

HWLabs radiators are brutal for flow rate and 2 of them in the same loop can consume nearly 50% of a loops pumping power.
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If that is the case I would definitely put them in parallel
 
Ok me being stupid here, when bleeding. while tipping my case in various directions, if I hear a sudden flood of water rush, is that air, ?

Because that happens quite a bit when tipping the case so that the 480 fad ports are at the top to bleed air ?.

if that si the case, there is still loads of air in my case. I did it a whole night the othe rnight and it still kept doing it. perhaps this is my ooveral problem ?

Any tips would be great.
Cheers
 
I think its the stupid cross chiller, I think I am going to redo my loop, and I have them stupid bubbles back in my cpu block. ahhhhr grrrrr. its not as if I did not bleed it I spent a whole 2 nights doing it, hours and hours.
 
DataVampire said:
I think its the stupid cross chiller, I think I am going to redo my loop, and I have them stupid bubbles back in my cpu block. ahhhhr grrrrr. its not as if I did not bleed it I spent a whole 2 nights doing it, hours and hours.
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With my 2x DDC's I'm pushing 265l/h and that's with a single 10w and an 18w.

My second 18w pump is broke so is being RMA's, would expect even more flow when running 2x 18w pumps.

My loop has now taken a full bottle of fluid with both pumps running, it barely took half a bottle with just a single pump.
 
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