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Water Cooling 2x Asus GTX780 D2OC's in a Corsair 350D that already has a Swiftech H220 in it.

post #1 of 8
Thread Starter 
Hi There!

I've recently built a new gaming PC, and my goal is to make it as quiet as possible.
So far, I've water cooled my Core I7 4770k with a Swiftech H220 unit, which has yielded me a slient 4.3ghz overclock.



For reference, I'm going to mount the SSD's in the empty CD drive bay, and the two hard drives at the bottom are being thrown into my home server.


Now, the task at hand, I've been meaning to water cool the two ASUS D2OC GTX780's I have, and I have a few questions..

1. Is there a good reason to get the nice EK full cover blocks, or can I get away with just using their universal gpu water block.
- I don't mind dropping the extra dough if it'll yield higher overclocks etc, but seeing as the current cooler only targets the gpu, would it make a difference?

2. I would like to ideally use the nice EK-FC Terminal Block to connect the two GPU's, should I go with a parallel or serial model though?

3. I'm thinking of putting in a 280mm rad in the front of my case, and a 120mm rad in the back, is that enough rad area to effectively cool both of these cards?

4. Pumps - I'm thinking a Laing DDC 3.25 pump configured like a EK-DDC 3.25 X-Res 100 . Is that reservoir adequate for my system? (I would ideally like to have the pump/reservoir mounted at the bottom of my case. - OR... could I Just use my H220 to pump everything around?

5. Tubing. - I'm thinking of going with 3/8 ID-1/2 OD tubing, to match my current swiftech H220 system, but would upgrading to 1/2in ID 5/8OD tubing make a big difference in performance?

6. Fans - Corsair SP120's good enough? I can get them for reasonable prices in a dual-pack, and I like the noise profile of the two that I have so far. Any alternatives I should look into?



I am open to any and all advice, as this is my first time water cooling, and I want to do this right.
Also, I don't mind spending more if it will yield noticeable performance / noise reduction gains.

Thanks in advanced to anybody that shares their 2cents.gif !
Edited by Hassasin195 - 12/18/13 at 11:39am
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post #2 of 8
Frankly, you don't have a lot of space to work with in that case. Especially if your going to have the AIO pump AND a custom loop going.

I'd honestly invest in a full size case before you get into custom loops.
post #3 of 8
full water blocks actively cool the GPU memory and sometimes the voltage regulators too so in my opinion they're worth the extra. A universal GPU cooler will just make do with heat sinks on these components which doesn't give you as much control

Where are you going to put the radiators? I'm not sure but I'd think you're looking at least 2x 240mm rads for the cards. I think you'll either be hacking the case to pieces or mounting them outside.

Reservoir capacity is pretty much a non-issue so long as it has a bit left over after you've got all the air bubbles out. Larger reservoirs will be easier to fill I guess as you can pour more fluid in at a time but it's mainly for looks and to handle the expansion/contraction of the water as the temp changes as it's an open loop system

In theory parallel is slightly better but fluid will take the path of least resistance so you won't get equal flow between the two cards so some people prefer series for that reason. People also report that temp differences are very minimal series vs parallel anyway so start series and take it from there.
 
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post #4 of 8
Thread Starter 
Quote:
Originally Posted by arjmad View Post

Frankly, you don't have a lot of space to work with in that case. Especially if your going to have the AIO pump AND a custom loop going.

I'd honestly invest in a full size case before you get into custom loops.

I'd like to challenge myself to fit everything into this form factor before I start sizing things up. Let's see what I can fit in this bad boy without hacking things apart.

Quote:
Originally Posted by pharcycle View Post

full water blocks actively cool the GPU memory and sometimes the voltage regulators too so in my opinion they're worth the extra. A universal GPU cooler will just make do with heat sinks on these components which doesn't give you as much control

Where are you going to put the radiators? I'm not sure but I'd think you're looking at least 2x 240mm rads for the cards. I think you'll either be hacking the case to pieces or mounting them outside.

Reservoir capacity is pretty much a non-issue so long as it has a bit left over after you've got all the air bubbles out. Larger reservoirs will be easier to fill I guess as you can pour more fluid in at a time but it's mainly for looks and to handle the expansion/contraction of the water as the temp changes as it's an open loop system

In theory parallel is slightly better but fluid will take the path of least resistance so you won't get equal flow between the two cards so some people prefer series for that reason. People also report that temp differences are very minimal series vs parallel anyway so start series and take it from there.

Sounds good on the full cover blocks, I would ideally overclock the cards, and keeping the voltage regulators and memory in check would be smart.

So... I did some measurements, no rad will fit in the back with that AIO in place, and a 280mm rad will not fit in the front.

I however calculated that I can fit a Alphacool NexXxoS Monsta 240mm rad (8cm thick) in the front, without modifying the case!

So, I'll have that rad, which should do the job nicely, and the proposed pump and maybe the slightly bigger reservoir (for looks and because it will fit under the cards and between the rad and psu).

So, it would be 240mm of 8cm thick radiator, without modifying the case, and room for plumbing too!
Is that enough rad area?

The front rads (240) would be intake (with the two SP120's I already have installed), and the top 240 would be exhaust. The back fan would be intake as well.
The psu is mounted with fan down and with an air filter, so I don't need to think about it.

Positive pressure maintained, ridiculous cooling in a confined space smile.gif

So, I'm settled on 1,2, 4, and 5. All that's left is to figure out if that rad is enough for both cards, and what size tubing to run.
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post #5 of 8
Thread Starter 
UPDATE!



I've ordered the above.

Decided against the super thick radiator, as it makes near to no difference in performance vs equivalent thinner rad, so I went with a higher fin density instead. (EK XTX)

I've decided to simply expand my H220 loop, as the pump can easily handle the load of the extra radiator and the blocks.

Will post more as parts arrive.
Edited by Hassasin195 - 2/4/14 at 5:28am
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post #6 of 8
My watercooled 350D - http://www.overclock.net/t/1397018/watercooled-corsair-350d

A 120mm rad at the rear can work, but it will be difficult unless you mount the fan on the outside of the case. Honestly, probably not worth the extra hassle and tubes you'll need to route, the space is so tight. 2 x 240mm rads should be enough, especially if one of them is the XTX.
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post #7 of 8
Thread Starter 
Quote:
Originally Posted by mojojj31 View Post

My watercooled 350D - http://www.overclock.net/t/1397018/watercooled-corsair-350d

A 120mm rad at the rear can work, but it will be difficult unless you mount the fan on the outside of the case. Honestly, probably not worth the extra hassle and tubes you'll need to route, the space is so tight. 2 x 240mm rads should be enough, especially if one of them is the XTX.

Awesome build!

Yeah, I found a few rads that would just ever so tightly squeeze into the back space, but due to the way that the H220 runs it's tubes / has the reservoir on the end, I would have to either offset the h220 (drill holes more towards the front of the case), or use an absurdly thin 120mm radiator. Even then, the fan would have to be mounted outside the case.
Not worth the hassle IMO.
I'll have to see how the temps are with both rads installed before I consider stuffing a 120 in the back.
Plus, the rear fan is running as cold air intake for the h220, which I think is necessary, as the front rad will be exhausting into the case.

This is all because I still want to maintain positive pressure in the case, as I've noticed a considerable difference in dust accumulation vs my previous case which I now realise had negative pressure.

Super excited for the parts to arrive, but could take a few weeks, as apparently EK has a shortage on many parts, including the blocks I need.
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post #8 of 8
Thread Starter 
So yeah, It's done!

Pretty GPU naked pics smile.gif



The full cover blocks were not available, so I went for the new acrylic ones. Same cooling potential, just leaves more pcb to be seen.


The new backplates really class up the pc




The Swiftech H220 had some wierd buildup inside the tubes, so I only used the EK tubing I bought.


The liquid from the H220 also had some particulate floating around in it, not sure what.


Test fitting and Filling, followed by leak testing.

The blocks look nice with the glow from my motherboard. Feel that I need to add a few led's in the case to make things glow wink.gif


And YES! it all fits into a Corsair 350D! The radiator was a TIGHT fit, but it fits nonetheless!



Currently max load temps on both gpu's are ~ 51*C in FurMark, and ~42*C in game (Titanfall, Metro Last Light).

Still working on overclocks, got up to 1248Mhz actual on the core stable so far, and +101mhz on the mem.

Seems like I'm hitting a power limit now, and not a thermal barrier. SUCCESS!

Currently the loudest thing in the computer is the pump, which I think I need to RMA, as it squeels like mad under low rpm's, vibrates quite a bit under standard 100% pwm, and all that gunk in the tubes and liquid must mean something has gone terribly wrong. Uploading video now explaining it all and will e-mail to a Swiftech Rep. And yes, I'm using the PWM splitter on the pump at all times, so it's getting the necessary voltage.

Thanks for the tips guys! I've achieved all my goals, and under budget!

Cheers
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(18 items)
 
   
CPUMotherboardGraphicsGraphics
Intel Core i7 4770k Asus Maxiums Gene VI ASUS GTX 780 D2OC ASUS GTX 780 D2OC 
RAMHard DriveCoolingCooling
Corsair Dominator - 8GB 2133 OCZ Vector 128GB Swiftech H220 EKWB GTX780-D2OC x2 for GPU's 
CoolingOSMonitorMonitor
EKWB 240mm XTX radiator Windows 8.1 Pro 64x Dell U2713HM Benq E2420HD 
KeyboardPowerCaseMouse
Flico Majectouch Ninja 2 Corsair AX860 Corsair Obsidian 350D Razer Mamba 2012 
Mouse PadAudio
Razer Golathius - Precision edition Sennheiser PC360 G4ME 
CPUMotherboardGraphicsGraphics
Intel Core 2 Quad Q9450 132-CK-NF78 NVIDIA GeForce GTX 280 NVIDIA GeForce GTX 280 
GraphicsRAMRAMHard Drive
NVIDIA GeForce GTX 480 Mushkin  Mushkin  60GB OCZ SSD + 4x WD 1TB Black Ed. in RAID 5 
Optical DriveOSMonitorKeyboard
Standard LG  Windows 7 Home prem x64 BenQ E2420HD 24Inch 2ms 50,000:1 Logitech G19 
PowerCaseMouseMouse Pad
1000W Corsair Antec 1200 Razer Mamba 2012 Razer Goliathus 
AudioAudio
Asus Xonar DX  Sennheiser PC360 G4ME 
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Overclock.net › Forums › Cooling › Water Cooling › Water Cooling 2x Asus GTX780 D2OC's in a Corsair 350D that already has a Swiftech H220 in it.