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Is it safe to shut off the pump ? - Page 2

post #11 of 17
yep, the water in the block will instantly heat up, then it will heat the block and eventually get into dangerous temps within a few seconds. Ive started my machine before without using the paperclip method right after I have redone my loop, and even for 2-3 seconds even out of windows the screen on my MOBO shows the temps get into the high 80's *c and the block is hot to hot to touch for minutes afterwords.
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post #12 of 17
Have you tried shutting the pump off and watching core temps?
Edited by Hatfieco - 1/22/13 at 12:48am
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post #13 of 17
Quote:
Originally Posted by Sean W. View Post

i just switched from the MCP355 to the vari MCP655 (D5 ), at the speed step 1, the pump is in fact inaudible. i dont have it decoupled or anything, just sitting on the bottom of my case. it comes with a like soft foam rubber pad type thing, its sitting on that, but thats it. i leave mine at 1.
Dude Ive got the XSPC Dual bay D5 and its always running at max and it still inaudible, great pump power and silence.
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post #14 of 17
Quote:
Originally Posted by Bloodbath View Post

Dude Ive got the XSPC Dual bay D5 and its always running at max and it still inaudible, great pump power and silence.

^ Ditto, except maybe im a bit more picky, but I've isolated my bay res by sticking some sound dampening foam (I cut up the pad that came with my MCP655) before stuffing it in the bay. Tight fit but no vibrations transmit to the case from what I can tell, even on setting 5.

My loop has a massive radiator and only my CPU, so I'm actually just running at setting 1. 25-30C idle and 50-62C while folding @ 4.8GHz.
And at setting 1, the pump doesnt even vibrate... As in, I open the case and put my finger on the pump, and feel nothing.
I was really paranoid about that at first but I could still see some water movement in the res window and my temps stayed low... so I'm sticking with setting 1 for now.
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post #15 of 17
Thread Starter 
All of these comments are very good news to me ! Thanks guys.
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post #16 of 17
Quote:
Originally Posted by PepeLapiu View Post

I suggest you get the. Koolance D5 vario. As per Martin's tests, it is the most quiet out there. Set on speed 1# and properly decoupled, you will never hear it. Best way to decouple a pump is to not mount it to anything. Just let it hang by it's two hoses and no vibrations will be transmitted to your case, hence quieter.

With what you suggest, within a few seconds of the pump being turned off, the CPU block will start to get hot and your pump will start again. You can get used to a constant regular noise much better than an intermitant one.

All the Varios are the same,just different stickers.
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post #17 of 17
Turning the pump on and off shouldn't hurt it too much so long as you are not doing it rapidly. One or two cycles an hour will be fine, one or two a minute will shorten the life of your pump.

The bearings in the pumps are hydrodynamic, meaning that when running they float on a thin layer of water. However when starting and stoping the ceramic surfaces are in contact until they build up sufficient speed to form the water layer, causing wear. After a lot of start / stop cycles this wear will accumulate and cause damage and / or vibration.

To be honest I would turn it all the way down to its lowest setting rather than turn it off. It will be pretty much inaudible at that level, especially with the case closed.
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