Laing DDC 1 Ultra, noisy

J

jonneymendoza

Supreme [H]ardness
Joined
Sep 11, 2004
Messages
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ok, so new system is now up and running, and I'm pleased with it, except one thing...

The problem is the pump noise - it spins at 4600rpm, and the high pitch whirr is annoying me.

does anyone have any experience with this pump

possible to reduce the rpm? how? i tried connecting the 3 pin fan connector from the pump into the mobo and tried adjusting it using speedfan but diddnt seem to work so i connected the 3 pin into my Akasa 6 fan controller and did not work either. tried disconnecting the molex from the pump and just connect the 3 pin to the fan controller and same thing?
 
Try using an in-line resistor to drop it back to 5v instead of the full 12v. Or grab an independent fan controller.
 
cheers will take a look but what do u mean my independant fan controller? doesnt the one i have suppose to do the job? am i suppose to connect the pump to bother a fan controller and the molex psu?
 
I just meant using something other than a mobo header.

The one you have is 30w / channel and your pump is max 18w. I've never hooked up a pump to that type of controller before so im not sure but it's possible that you can hurt the pump by supplying too much power. At the same time though, it could be fine if you keep it dialed down. If it's me, I would grab a 5 or 7 volt resistor and see how your revs and db's are. They come with almost any half decent fan these days and are available, by themselves, from most places like frozencpu.
 
Loafdogg420 said:
I just meant using something other than a mobo header.

The one you have is 30w / channel and your pump is max 18w. I've never hooked up a pump to that type of controller before so im not sure but it's possible that you can hurt the pump by supplying too much power. At the same time though, it could be fine if you keep it dialed down. If it's me, I would grab a 5 or 7 volt resistor and see how your revs and db's are. They come with almost any half decent fan these days and are available, by themselves, from most places like frozencpu.
Click to expand...

The fan controller will not supply more wattage than the pump asks for. The only thing it does is varies the voltage, which then varies the speed. You always want your fan controller to be rated higher than what you're trying to control. If its rated lower, you run a very good chance of blowing up your fan controller (not literally of course).
 
Tsumi said:
The fan controller will not supply more wattage than the pump asks for. The only thing it does is varies the voltage, which then varies the speed. You always want your fan controller to be rated higher than what you're trying to control. If its rated lower, you run a very good chance of blowing up your fan controller (not literally of course).
Click to expand...

Ahh! Thanks Tsumi. Always wondered :p I'd suggest the OP throw that pump on the controller, since you have it already.
 
I have connected the pump to the controller and it doent do anything to the pump. i tried connecting just the 3pin to the fan controller and not the molex connector and the pump would jut not turn on at all
 
jonneymendoza said:
I have connected the pump to the controller and it doent do anything to the pump. i tried connecting just the 3pin to the fan controller and not the molex connector and the pump would jut not turn on at all
Click to expand...

That's because the 3 pin header on the pump is strictly to monitor RPM. All the power is supplied by the 4 pin molex...
You need to wire up the power cable to a 3 pin header. Its not hard, you simply need the right parts.

This is the header + pins - http://www.performance-pcs.com/cata...roduct_info&cPath=60_923_924&products_id=1389

Cut the 4 pin molex off the pumps power cable, and crimp on the proper pins for the 3 pin header on the bare wires. Then insert pins into the proper location. Don't worry about the RPM sensor, its not needed on the power header (leave it separate so you can plug it into the mobo to still monitor RPM). The yellow wire on the pumps power cable is the 12v supply, and the black is ground. Insert them into the 3 pin header like the picture below. Then plug them into the fan controller. Remember that the pump has a minimum voltage it requires to start...so if you set it too low, it might not restart when you cycle on the PC. So keep an eye on it.
3Pin12vMB_2.jpg
 
That works too. Just won't be as neat or elegant. Additionally, while 3 pin to molex adapters are very common, the opposite is much less common.
 
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