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Heat Dissipation Question for Liquid Cooling Setup

post #1 of 15
Thread Starter 
This is my first post within this forum. Please be gentle...

The question I basically have is, did I designed a strong enough of a water cooling setup to remove the heat from my components while maintaining an overclock? I have installed some basic water cooling setups before but this one I built is the most elaborate I have done. I have already purchased and installed the below listed components.

Tubing: 3/8 ID - 5/8 OD Tygon
Pump: Danger Den DD-CPX Pro 12V Pump Rated @ 237 GPH
Reservoir: Bitspower 5.25 Bay Reservoir Model BP-WT525P-BK
CPU Radiator: Black Ice GT Stealth 120 Radiator
Video Card Radiator: Black Ice GT Stealth 360 Radiator
CPU Water Block: Not Purchased-Recommendations?
Video Card Water Block: Not Purchased- Recommendations?
Radiator Fans: Aerocool Shark Red Edition 120mm x 25mm Rated @ 82.6 CFM
Case: Azza Hurricane 2000

Listed below are the components I want to cool with this liquid cooling setup.

CPU: Intel BX80613I7970 Core i7 970 Processor - 3.20GHz –Overclocked to 4+GHz
Video Card(s): 3x Nvidia GeForce GTX 580 –Mild Overclock

The cooling loop would be as follows...
Leaving the pump, into the cpu, out of the cpu, into the single radiator, out of the single radiator, into the 3 video cards (Parallel Instead Of Series), out of the 3 video cards, into the triple radiator, out of the triple radiator, into the reservoir, out of the reservoir, into the pump.

Any feedback would help me with my build and better understand how I can proceed.

Thanks!
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post #2 of 15
I would hazard to guess that using those specific radiators you would have "eh" performance. The stealth series is known for having high FPI and a slim design to help it fit into tight spaces yet still preform modestly. Problem is, they are extremely restrictive. I had a 360 GTS X-flow and a 120 GTS in my loop with a single MCP655 and it was hardly moving the water from what I could tell. (and later confirmed when I added a second pump)

On top of that, I doubt the radiators would be able to keep up with all that heat. Those GPU's and that CPU will put out a pretty decent amount of heat, more than I would say those radiators are capable of handling (keeping it water/air delta under 10C). Personally I would try to go for a Black Ice GTX 360 (High RPM fans, high heat dissipation) or a XSPC 360 RX (Lower RPM fans, lower heat dissipation).

For the CPU block I'd suggest a EK Supreme HF. Great flow and awesome heat control. GPU blocks...Personally I've only had experience with EK blocks so I would recommend them as well, but if you look around you might find a more qualified opinion.
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post #3 of 15
I just realized you said you have 3 580s so I edited my response. Yes this is not enough radiator surface area to cool 3 580s and a i7. You will need two 360s or a 480 and a 240 to cool these. I had to mount a gtx 360 radiator outside of my case to help suppliment my loop. The best radiator as shown on skineelabs is the gtx series mixed with fans at 1800+ rpms. For cpu I recommend the Koolance cpu370 and the Koolance vid-580 for your GPUs. I have both of those for my setup and they are giving me fantastic results and both were super easy to install.

Also, skineelabs.com is the best website for water cooling hardware comparison. I found tests for every component in my loop on this site. It really gives you a good idea on how your loop will perform and where any weak points might be. Hope this helps!

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post #4 of 15
OK so the loop order is not too important as the water will equalize thru the loop after a few minutes of it running.
You don't have enough rads for an i7 970 and 3x 580.
I say you need at least 1 more 360 maybe 2.
As far as the blocks are concerned, I would check out skinneelabs reviews for the most recent best blocks.
http://skinneelabs.com/cpu-blocks/2011-roundup/
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post #5 of 15
Thread Starter 
Thanks for the quick responses. Unfortunately these answers are what I was starting to expect.

So moving forward, the common answer seems to be I would need additional radiators/larger. The issue here is with the case I chosen and layout I want to keep the radiators inside the case. I only have enough room in the upper section of the case for the triple radiator. I have the single radiator mounted in the rear exhaust fan area. I have also prewired and setup the fans along with temperature probes in the sections of the radiators.

Unfortunately I have invested too much time and money to drastically change the design now.

So my next question would be... If I dropped to using 2 GTX 580 cards, would this system work?

Also, for my own information in the furure, is there a rough calculation what a single, double, triple radiator can remove for heat?

Thanks again.
Edited by JutMiller - 3/17/11 at 9:19am
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post #6 of 15
help us help you. fill out system spec. in user cp. i had 2 480 in sli and i7 on a slim 360 rad it was fine. my 2nd gpu was hoter then 1st but @ 56 then 61 degs was not bad. now i got 480 rad thick and i7@ 4ghz and single 580@900core. cpu 65 degs gpu 49 degs.
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post #7 of 15
Yes dropping a card would def help. To be honest, you can get away with using the setup you originally stated, you just wont get a super cold delta. I say do your setup and adjust it if it is not to your liking i.e. not getting cold enough. Like I said before, go with the gtx radiator series with 1800 rpm fans. This will max your cooling.

Here is my setup and numbers:

Running a x6 at 3.8ghz and 2 gtx480s at a slight overclock.
I have the koolance cpu370 block and 2 koolance vid480 blocks. I have a swiftech mcp655 pump with a frozenQ tvirus res. I only have 1 360 gtx radiator mounted externally off the back with fans running in push/pull at 2000 rpms. My loop order is res-pump-radiator-gpu bottom-gpu top-cpu- back to res. My cpu is at 27c idle and 31c full load. Gpu's at 28c idle and 36c full load. As you can see, these are decent numbers for only having one 360 gtx rad. It helps my room is pretty cold at 66F. Hope this helps


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post #8 of 15
FWIW, you can do amazing thing with small radiators with high speed fans. I think you would do fine with the gts360 if you switched out to some 2500 or stronger rpm fans.

I've also been experimenting with the new sunbeam rheosmart fan controller that takes a pwm signal and converts it to analog voltage. I took the cpu PWM signal and now dynamically scaling up four radiator fans as well as my mcp35x pump.

I think you could do something similar with the gpu pwm signal.

My only uncertainty is tthe pumping power, you might need two of those pumps.
    
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post #9 of 15
The rads you have chosen are more towards their quiet end, you won't be able to cool very much with low rpm fans on small rads. As suggested by others if you don't want to add more rads you will need to use higher rpm and louder fans. I would also suggest that to maximise the transfer area you picked a thicker rad such as the Hardware Labs GTX line.



You would be looking at around 1000W of heat with that setup (3 580s and a 970). A 10C delta is fairly good, so you would probably have to run your fans around 2000rpm, assuming you would have an identical 120 rad with the same fan speed too.

It can be done, just don't expect it to be silent.

EDIT: Stealth appears to come from their dimensions not the fact that they are best performing at low rpm fans. The stealth ones could work fine if you use high enough RPM fans, 2k rpm+.
Edited by ryand - 3/17/11 at 12:53pm
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post #10 of 15
Thread Starter 
Thanks again for the replies. I am full of questions...

You are correct. I estimated roughly 1000 watts of heat. I also figured one 120mm radiator for each device should be effective (CPU, Video Card #1, Video Card #2, Video Card #3) which doesn't sound like that was the right way to think of it.

I some-what understad the chart you posted. What I am unfamiliar with is the Delta rating. Could you please help explain to me.

Currenty I have installed the same brand/make of radiator. A 360mm version and a 120mm version. The fans that are mounted onto the radiators are all the same brand/make, setup to push air through the radiator.

I am not exactly understanding the exact importance of fan RPM's. I understand in general that more RPM equals more air flow. However the fans I currently have installed are as follows...

Speed: 1500 RPM+-10%
Air Flow: 82.6 CMF
Power: 3.6W
Air Pressure: 1.273 mm-H2O
Fan Size: 120x120x25 MM
Noise: 26.5dBA

Now if I compare them to another brand...

Fan Speed: 2000 RPM
Air Flow: 79.14 CFM
Power: 4.56 W
Fan Size: 120x120x25 MM
Noise Level: <36 dB

So where I am getting confused is, you can see from this info, the faster fan isn't moving as much air by volume. Can you help me clarify a bit more? If I need to invest in new fans I would like to attempt to keep them on the quieter side and compare RPM Vs. Flow.

Thanks. And again I really apreciate you taken the time to help me out.
Edited by JutMiller - 3/17/11 at 1:49pm
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