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new build pump question :)

B

brurion123

n00b
Joined
Sep 7, 2011
Messages
3
You'd be better off with a DDC than a D5 for that much restriction. A single one could probably cut it, but if you have any QDs in there as well you're going to want two.
 
QDs?
what kind of power L/hr should i look for, can I make a mistake and have a pump too powerful?
 
brurion123 said:
QDs?
what kind of power L/hr should i look for, can I make a mistake and have a pump too powerful?
Click to expand...

Maximum flow rate (L/hr) doesn't really matter, all that matters is head pressure at around 1 gallon per minute flow rate.

Take all the restrictive pressures of the components you want to use at around 1 gpm flow, add them up, then subtract them from the pump's head at 1 gpm. If it's greater than the pump's head, your single pump won't handle the loop at an ideal flow rate.
 
QD= quick disconnects. they add a good deal of restriction to the loop.

the pump can only be "too powerful" if its a non-magnetic drive type of pump that could be damaged by putting too much restriction on it. you can restrict a DDC or D5 to infinity and it will not damage the motor.

there isnt a set requirement for flow rate (L/hr). the flow rate of your loop depends greatly on the amount of restriction in it and the head pressure of the pump. anywhere between 300 and 800 L/hr should be a good range to look in, but that doesnt mean higher or lower wont still work in certain setups.

a higher flowrate = more uniform temperature at any two given points in the loop. when the water moves slower, a greater amount of heat is transfered from the a component like the CPU to the water per unit of water flowing (meaning the heat transfer is more efficient) but your average CPU temp will read higher than it would if your flow rate was higher.
 
Do you have your GPU's in parallel or in serial?

If in parallel, you want the higher flowrate of the D5.

If in serial, you want the higher pressure of the DDC. Make sure to get a custom aftermarket top if you get a 355.
 
damn i guess i need to find a head pressure with somthing that is enough for 7-9 items so about 1 gpm each, but all i can seem to find is 4.7 on most DDC and even less on D5. Is it recommended to use 2 pumps in 1 loop? if i can find enough head pressure on a single pump? How does positioning work, would 2 pumps side by side be the same as in comparision to having them at different areas of the loop? I thinking of using the EK FC paralell bridge on my cards, It's been reviewed as quite stable and effective in comparision to daisy chaining them with tubes for serial.

If you guys have or know about a single pump thats enough for this please say, i'd really appreciate it so far what i'm looking at is http://specialtech.co.uk/spshop/cus...acool-Top-in-Plexi-Bundle-Deal-pid-11175.html x2 since im finding it hard to come accross a pump that exceeds 4.7 of head pressure on a single item. Theres some bundles availble on some websites that offer 2 D5 pumps but they look very different, is it possible to combine 2 pumps from different manufactures or should i stick to 2 excatly same ones if that route is best.
 
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With such a complex loop you are going to have to pick all your parts with low restriction in mind.
If you do that, you can get away with a d5+pump top at p3 and be well over 1 gpm.

flowrate.jpg


drops to about 1.1 if you change to serial flow on the gpu blocks
Also if you use 3 swiftech mcr320 1.1 paraller, and .97 serial. (save 150 dollars over the rx360).


I picked the lowest restriction parts, if you end up getting the ek, either get one with unplated copper, or en plated nickel. Koolance 370, and xspc raza also are great blocks but have greater restriction. (Even though they have very low restriction).
The apogee XT is out of the question for you.

The benefit of using the d5 over the ddc.. is well at p3 on padding its basically inaudible, well almost.
 
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