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dual pumps - Page 2

post #11 of 18
Ira...

Not sure I'm ready to give up that sexy rad setup to go to the rocketfish...
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GrandPa's Gamer
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post #12 of 18
Thread Starter 
ha ha ive had to do all this behind my parents back, they hate me spending money on my pc. they threw a fit when i added two pairs of cold cathodes lol
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post #13 of 18
Quote:
God my wife would turn from a rooster to a hen with one cut if she new....
HaHa.........Mine would kill me to....
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post #14 of 18
Quote:
Originally Posted by ira-k View Post
HaHa.........Mine would kill me to....
I am just upgrading my pump to a Laing D5 ,

what sort of pressures do you get with a dual pump system

( only ask as I have some cheapo plastic pipe clamps and worrieed about blow off )

also I like the idea of 2 pumps one as a back up but my assumption would be they have to be similar flow rates ???

or the slower would act as a flow 'brake ' ????correct me if I am wrong

DDC-1T Pro (10W) Spec:
• Nominal Voltage: 12 VDC
• Operating Voltage range: 6 - 13.2 VDC
• Motor Type: Electronically commutated, brushless DC, spherical motor
• Max. Head - Blue Impeller: 3.7m
• Max. Discharge - Blue Impeller: 564 lt/hour
• Electrical Connector: 4pin Molex
• RPM Sensor: 3 pin connector

replace or dual with

Swiftech Laing D5 Vario 12V

Details:
• Size: 90x90x90mm
• Pump Speed: 1,500 LPH (Variable)
• Max Temp: 60° C
• Delivery head: 3.7m
• Power Consumption: 23W
• Voltage: 12V 4Pin Molex
• Compact size allows installation almost anywhere in the case

This pump is RPM adjustable

• P1 = 1.800 revs./min
• P2 = 2.550 revs./min
• P3 = 3.300 revs./min
• P4 = 4.050 revs./min
• P5 = 4.800 revs./min
    
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post #15 of 18
With 2 of the old high pressure orange impeller 18W DDC I was getting a little over 9psi in a CPU only loop with a 240 BIX rad and about 5' of tubing...The more blocks you have the higher the back pressure will be, also the more restrictive the block the higher back your pressure will be.

I don't really think you'll need to worry about your tubing blowing off with plastic clamps, I prefer automotive worm drive clamps myself, or 2 or 3 zip-ties on each barb, or a clamp and a zip-tie or 2......I might kill me rig over-volting it, but I'm going to try my best not to kill it with water...

Yeah you want to run 2 of the same pumps, like you said if you ran a lower rated pump it would just bottleneck your flow to the slowest pumps rating anyway.

Even 2 of the 10W DDC in series wouldn't be bad at all. They are just a little less performance then a D-5vario, the 18W DDC is just a little better then a D-5, thats with a top on them of course. Now the old orange impeller 18W DDC were another story, I loved those pumps...
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post #16 of 18
lol belt and braces sort of guy eh

would it on be wise to have a pu;mp before and after the constriction , therefore you would get equal pressure either side of the cpu block for example ???

just a question
    
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post #17 of 18
Quote:
Originally Posted by killbot View Post
lol belt and braces sort of guy eh

would it on be wise to have a pu;mp before and after the constriction , therefore you would get equal pressure either side of the cpu block for example ???

just a question
Your really going to have the same amount of head/energy in the loop no matter where you have them, the pressure reading might change..But psi is just a measurement of outward force, head is the energy and velocity in your loop, head/energy/velocity is what the pump contributes to the loop cooling as a whole...I just put them in series together right before the rad and the CPU block, I figure I'll get the most velocity through my rad and CPU that way..

You can change your psi by the amount of coolant you put in your loop, as it gets more viscous the psi will rise, the head stays constant, its the highest at the pump outlet and returns to 0 at the pumps inlet...The head is consumed in the loop...

Anything in your loop that scrubs off head/energy/velocity with-out picking up or releasing heat is head/energy/velocity lost...Thats why we try to use as short a tubing as practical and as few fittings as we can...Thats just a general rule, adding a little extra tubing if you need to isn't going to kill your temp's...
Edited by ira-k - 7/10/08 at 11:29am
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post #18 of 18
many thanks for that ,

just got me a another vario for half the price of the other

so 2 it is just need to sell the old one now :O
    
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