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Discussion Starter · #1 ·
Need some help guys on what will be the best pump for my needs.

360 and 240 Rad, 4 EK Titan blocks, Cpu block

Whats the best pump to go with?
 

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Discussion Starter · #3 ·

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Wow that's gonna be quite a setup. 4 way SLI Titan!! With total 5 X 120mm radiator space, I think you need a bit higher RPM fans. Especially, Monsta radiator is very thick and it imposes a lot of airflow restriction to fans. If you can get good amount of air through those radiators, then they should be enough to cool your rig.

If you can afford 4 Titans for your graphics, I guess you have high expectations on your cooling performance too. I suggest you look at dual pumps, e.g. dual D5 or dual DDC(like MCP35X2). Also, if you can fit in your case, get more radiators I doubt you can maintain 10C air-water delta with only 5X120mm radiator space even with very high rpm fans. I speculate that it will be probably more close to 15C which is fine...but still you want the best of the best
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Quote:
Originally Posted by Stay Puft View Post

Need some help guys on what will be the best pump for my needs.

360 and 240 Rad, 4 EK Titan blocks, Cpu block

Whats the best pump to go with?
Grats on your Titans! I ordered one, waiting for preorders to come up again for my second. Anyway to the task at hand. You would probably want more radiator space, as I'm assuming you want to overclock those cards. If each card has about 250 W of heat without an OC, you already need 1000W of radiator space to cool it, A good rule of thumb is probably 120mm for every 100W. So you want more like 10.120mm radiator space (or thicker rads with push pull). And that's before including your CPU. I'd probably suggest you do a dual loop/pump design, with 2 GPUs on one loop, and two GPUs and the CPU on the other. That's if you want to be able to run the system with heavy OCs (and given your system it would be sacrilege not to
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).
 

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I'd say add one more Monsta 360 Rad and your good to go along with a dual mcp655:p
 

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Why guess when you CAN calculate it. Find out what the pressure drop curve is for the block, now look up the pressure drop at 1 GPM. Add up all of the pressure drops for the loop. Now select a pump that has at least that much pressure at 1 GPM and you will net more than 1GPM.

Running parallel means rather than adding pressure drop, you take the pressure drop of one block and divide it by the number of blocks. It does however mean you flow rate through the GPUs is divided similarly.

You need the block pressure drop to design for pump power needs but I really doubt you "need" more than one D5/DDC/35x. Do the math rather than guessing..
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Discussion Starter · #10 ·
Thank you guys. You've given me a lot to think about and plan out. I'm starting to rethink my choice of a case. I think i'm going to need something a lot bigger.
 

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1. You don't have enough radiator. The whole purpose of water cooling is to provide _more_ fin surface area than you get with air cooling, and to gain the ability of cooling at a different location. That means you need to at least match the amount of fin surface area of 4 titan air-cooling HSFs plus a standard CPU HSF. Otherwise, you're likely to get better temps just using air-cooling.

2. I'd recommend you run the Titan blocks in 2x2 series/parallel. That gives you the pressure drop equivalent to a single block and provides 50% flow to both pairs. A single D5 would be no problem like this.

3. I'd recommend using a dual D5 at lower settings instead of a single D5. Having four Titans is a _lot_ of money and you don't want to screw around with a $70 pump death causing all four to burn out, leaving $4000 damage. Get the second pump for redundancy.
 

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Quote:
Originally Posted by Stay Puft View Post

900D looks good. Any idea on availability?
If you need a large case now for cooling all that, get a Mountain Mods, Little Devil, or Caselabs case. None of them are cheap, but they are the guys to go to for big water cooling.
 
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