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Poweradjust 2 usb change the rpm of your laing ddc pump

post #1 of 26
Thread Starter 
Hi guys,

I thought I would link you this very interesting product, I actually ordered it last night from the official site in Germany.

http://www.sidewindercomputers.com/aqcopo2usbul.html

I know the Laing DDC pump is quiet, but to my ears the buzzing sounds annoys the hell out of me.
This is not caused by vibration, I double checked that, it's generally the rotation of the pump speed and water flow. 4500RPM standard is crazy, I'd rather say 3900 or so.
if I can shave off a few hundred RPM, I'm sure I can get it to near silent.

Anyway Just thought I'd share the love.

If anyone uses this, would you kindly let me know how it performs?
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post #2 of 26
You could just use a regular fan controller - hook the RPM sensor to the motherboard and the power connector to a fan controller. I'm assuming you already have a fan controller - do you have any empty slots on it?
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post #3 of 26
Thread Starter 
Quote:
Originally Posted by charliehorse55 View Post
You could just use a regular fan controller - hook the RPM sensor to the motherboard and the power connector to a fan controller. I'm assuming you already have a fan controller - do you have any empty slots on it?
Are you serious Charlie?
Can I actually do that?
I have the Scythe fan controller. I have a spare slot yes..
Are you sure this will work?
My fan controller is all 3 pin as well. Can I use a converter?

This is my fan contoller

http://www.scythe-usa.com/product/ac...03_detail.html
Edited by Salsal - 10/23/10 at 4:55pm
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post #4 of 26
Yep, just fine. The controller is only rated at 12w, but I'm sure it will work just fine at the 14-15w you will be running it at.

You'll just need to solder the molex connector with a three pin fan header - shouldn't be that hard. Put the RPM sensing wire to the motherboard so you can see the pump's RPM.
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post #5 of 26
Nothing wrong with the Poweradjust series, though Sidewinder tends to run out of Aquacomputer stock VERY quickly (the Multiswitch LT 1.41 is still in stock, though).
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post #6 of 26
Thread Starter 
I'm happy to report guys that I have done this mod.
My temps have gone up 2 degrees in Furmark, but I am running the pump at 1900 RPM now compared to 4500.
The PC now I must report is dead silent. @ degrees difference over 20mins of furmark is amazing.
The noise was really irritating me, so this has now resolved the issue.
Thanks so much Charlie, you have always been a tremendous help.
+1 Rep mate..
I'm a very happy chappy.
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post #7 of 26
Have you tried higher RPM? 1900 sounds really low. I think that should be a sweet spot where you still can't hear the pump but there are no temperature increases. Have you tried running 3000-3500 RPM?
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post #8 of 26
Thread Starter 
Quote:
Originally Posted by charliehorse55 View Post
Have you tried higher RPM? 1900 sounds really low. I think that should be a sweet spot where you still can't hear the pump but there are no temperature increases. Have you tried running 3000-3500 RPM?
Yes I've tried that, hardly any difference.
Now the only issue is this now, the pump seems to want to only start when I turn the computer on at at least 3500RPM.
Is there anyway to modify this to start at 2000rpm when I switch the power of my pc on?
Because I don't think enough voltage is being supplied for startup..
Any ideas?
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post #9 of 26
Maybe hook the pump directly up to motherboard and then program speedfan or some other program to control the voltage down to 2000 RPM. Then when the computer boots the pump will start at full speed (because the program hasn't started yet) and then your startup-item fan controller will reduce the pump to 2000 RPM.
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post #10 of 26
Nice way to tame the pump other than switching to a MCP350.

I've tamed my MCP350 at first with a fan speed controller. It added heat to the controller which added the heat into the computer case. Next, I read about under volting the pump with the 12VDC and 5VDC rails to 7VDC. I got numerous replies back not to do this since the wasted power converted into heat on the rail will kill the PSU in time.

My last solution was cheap. My brothers old 7" portable DVD player died, but his walwart at 9VDC 750mA was just the perfect item to run silent for the pump.

Most people WC for better OCing, while others WC for piece of mind and quietness. I'm with the latter. Doing video editing and sound recording, quiet is nice.
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