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Directly coupling pump and block

G

Geoffrey4283

Weaksauce
Joined
Aug 22, 2005
Messages
84
Could you take a DDC, and hook the outlet directly to a CPU waterblock via a male-to-male extender/coupler? (like one of these)

Let's see if I can pre-empt some things:
1. Assume for the moment that I have a good reason for asking, and we can skip the "no one should ever need to do that" category. I'm also aware of the combos like those in the H100i and the H220, and I'm asking the question anyway. (edit: AND the H90, AND the Eisberg...)
2. Obviously, this is the exact opposite of trying to de-couple the pump from the rest of the system to eliminate vibration. Given that there are several other block/pump combos in existence (albeit ones that more closely integrate the two pieces), de-coupling does not seem to me a requirement, so much as a bonus for eliminating vibration/noise.
3. On its own, I'd probably worry if the fitting alone could support the weight/stress of having the pump hanging off of it (whether it was horizontal or vertical), and would think, if it is viable at all, some other kind of support might be needed to avoid introducing undue stress.

So, does this fall into the category of "something one should simply never, ever do"? If so, why?

If allowable, then... what would be the best way to accomplish it, keeping two goals in mind: minimizing the gap between the two components, AND maintaining the ability to control the alignment of the devices relative to one other.
 
Last edited:
ChefJoe said:
Why do you want to crowd your CPU with a pump you'd have to hang off some bracket to support the weight without having the pump body contribute to heat transfer like the innards of the H100i pump/cpu block ?

http://www.frozencpu.com/products/i...s_LGA_115x_1366_2011_AM2_AM2_AM3_FM1_FM2.html
Click to expand...

Because I'm toying around with the idea of doing a loop in a non-traditional fashion, and I wanted some input from people with more expertise and more experience as to whether my idea is verboten or merely unusual. If consensus is that it could work, then I might try it, and report back with results. If not, then I probably won't take the risk and will try to use a more traditional setup.
 
Nearly all standalone pumps would be too big and heavy to be mounted to a waterblock.
 
sure you can. It seems you have your reasons. As long as you follow proper measures to seal the connections. You'll also have to worry about clearance between the block and pump. You may need to use a 1"-2" section of pipe between the fittings. I would suggest building a bracket that ties into the cpu block mounting, or better yet build a bracket that ties into the standoffs for the mobo and those screws. The biggest issue is going to be weight.
For years I've wanted to build a loop that is all bent 1/2" copper pipe that is hard connected via threading the pipe and soldering a single hidden joint to make it all fit. I've never done it but have all of it planned out.
 
My old Heatkiller 3.0 with the solid copper top is 400g. If you opt for the cheaper acetal (POM) top variants the weight drops significantly, to 150g. A MCP35X pump is 215.46g (7.6oz). On the common side of aftermarket HSF's of today you have the CM 212 EVO rated at 465g for the heatsink, plus another 104g for the supplied fan. If you look at the numbers together you realize an acetal top waterblock and 35X pump combined would weigh less than the HSF.

On the absurd end of the spectrum the Noctua NH-D14 weighs 1240g in the two fan configuration...:eek: 900g of that is just the heatsink itself. Now I know that the MCP655-B is a significantly larger and heavier pump, but at 650 g (1.4 lb) you would still have to combine that with a heavier all metal waterblock to reach combined weight of the largest HSFs on the market.

That said, if you are going through with this I would highly recommend a sturdy 'hammock' of zipties supporting the pump to keep it from sagging and putting pressure on the bottom part of the O-rings in the fitting connecting it to the waterblock. A HSF can sag a motherboard as long as it doesn't snap any solder or traces. But if your pump were to sag it could make an otherwise good seal that ran dry in a test run leak once inside your case.
 
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