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New build, need help with loops!

post #1 of 15
Thread Starter 
Hi all, I am planning on building a new computer however I think I am going to run into some difficulties with cooling loop setups and I wanted to see if anyone has some suggestions. (Note the waterblocks and cooling system are Koolance product numbers)

My processor will be: Intel Core i7-990X Extreme Edition Gulftown 3.46GHz 6 x 256KB L2 Cache 12MB L3 Cache LGA 1366 130W Six-Core Desktop Processor
Water block: CPU-370 (CPU), 1.5mm Midplate [no nozzles]

Graphics will be: EVGA GeForce GTX 590 Classified Hydro Copper Quad (This is a set of 2 GTX590s that will SLI together, Also these are the "Hydro" addition so they come with waterblocks already) (Note: these are dual GPU cards so i will have a total of 4 GPUs to cool)
Water block: Stock

The cooling system that I am looking at getting to cool all of this is the Koolance ERM-3K3UC. This unit has a 3000W cooling capacity. I wrote the pump specs on the attached picture (@ max voltage pump can do 5.9 GPM @ 19 Ft head)

My main concern is how to set up the loop to get the most cooling efficiency when running @ high heat loads. Also I am concerned about choosing the proper tubing size as well and whether or not I will need an additional pump in the loop to increase the DP across all of the blocks...

Possible loops that I can think of:
1) Attached is a drawing that I made of 1 possible loop setup. As you can see in the drawing the processor and memory are in series and that is in parallel with parallel video cards. I am afraid in this setup that i might be robbing from the CPU loop or vice versa or that the overall flow through each block will be too low...

2) Option 2 is everything in series in 1 loop
ERM-3K3UC>CPU>Video1>Video2>RAM>ERM-3K3UC
With this setup, i am concerned about the 2nd video card getting hot...

3) Option 3 would be the same as option one except the video cards would be in series...

To summarize:

My main concerns are

1) do i need an extra pump in the loop?
2) what tubing size do i use?
3) what loop setup should i use and what tubing size should i use between all of the water blocks if splitters are present?

Appreciate your help in advance!
post #2 of 15
Thread Starter 
anyone?


I've re-thought it and i am leaning more towards the all in series setup... that would be max flow rate for each waterblock... but i'm still unsure
post #3 of 15
It seems you are trying to "kit cool" a very custom loop. I see no reason to cool the RAM,all those splitters are going to look "not appealing" to the eye. This should be done with two custom loops. Have you taken a look at any loops that use splitters? they do not look good.
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post #4 of 15
Quote:
Originally Posted by PCCstudent;14323070 
It seems you are trying to "kit cool" a very custom loop. I see no reason to cool the RAM,all those splitters are going to look "not appealing" to the eye. This should be done with two custom loops. Have you taken a look at any loops that use splitters? they do not look good.

I'm with him on this, the gpu's are going to create lots of heat and it would be best to isolate them in a separate loop. It will also look and work better than the separate unit.
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post #5 of 15
Thread Starter 
ok so throw the RAM out...

but is the 1 loop idea, all in series, just out the window also?

ERM-3K3UC>CPU>Video1>Video2>ERM-3K3UC

I am estimating that the CPU will generate ~500W of heat and the video cards (being dual GPU cards) will generate ~700W each leaving a total of 1900W required... With the ERM3K3UC being a 3000W cooler, i would figure that it should work unless i am missing something?

Thing is that I was looking at the "Exos 2.5" but they only have 1000W capacity with a 3 x 120mm fan radiator... so at minimum i would have to use 2 exos's and 1 extra radiator and possibly a second pump, i was trying to avoid too many separate units/radiators and get it all in one box...
post #6 of 15
The EVGA blocks are poorly rated, dont get them and go for anything else. Koolance looks good to me.
You dont need RAM blocks either.
Parallel is the way to go for the GPU blocks.
A single loop and single pump, the order doesnt matter.
Tubing size doesnt matter much either but I recommend at least 3/8" I.D. tubes or bigger.
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post #7 of 15
No way in hell a CPU and two GPU's are going to generate 1900 W of heat, not even half that.
I recommend XSPC's RX rads, maybe 2 120.3 rads would do just fine.
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post #8 of 15
"1) do i need an extra pump in the loop?
2) what tubing size do i use?
3) what loop setup should i use and what tubing size should i use between all of the water blocks if splitters are present?"


I'm undertaking this very build with water cooling...to give my 2cents - you'll be fine in theory. Build it and see. I've looked at countless charts and graphs and they seem far out of my builds reality....to many variables I assume...Ambient, Length of tube, Over clocking, airflow, fan speed interference, dust that collects etc... I'm reverting to the old school "try it" but with as much theory as can be comprehended.
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post #9 of 15
One loop:

Pump: MCP655 Vario

CPU block: Sapphire enzotech. best there is in terms of performance (2-3C worst then the best), has the BEST flow rate out there and is SUPER cheap.

1/2 tubing

Cooling: cards draw 334W each. 800 total watts of power to disapait MAXED without OVERCLOCKING (this is including your cpu)! Each section of a 120mm rad can do 300 watts MAXED (more like 200). With that regard, two triples with 1200 RPM fans on a swiftech rad will cool it perfectly and you can OC it all.

RES: Swiftech res version (just need one)

Note: NEVER PARALLEL ANYTHING!! NO RAM COOLING!

Single loop is ALWAYS better then a dual loop. Why? Say you have 300 watts of heat being dumped and can cool 500 watts, that can be used for the other loop!!!
Edited by Nick911 - 7/23/11 at 11:47pm
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post #10 of 15
Quote:
Originally Posted by Nick911;14325223 
Note: NEVER PARALLEL ANYTHING!!
For the life of me, I cant find a single advantage to serial GPU blocks.
Enlighten me. wth.gif
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