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Pump Into CPU Fan ?

post #1 of 12
Thread Starter 
I just installed a Koolance water block and am getting a message "cpu fan error" which I can disable but I was wondering I have the following pump: Alphacool VPP655 / Laing D5 Single Edition Pump : VPP655SE
it has 5 speed settings highest being 4800 rpm which I tend to use connection is via Molex but I have a Molex to 3 pin cable. So can i connect this pump to the cpu fan header? will it work? This way I wount get the message and monitor speed of pump.
post #2 of 12
i wouldn't do that. i would just disable monitoring of the CPU fan.
    
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post #3 of 12
Thread Starter 
Quote:
Originally Posted by iCrap;14727483 
i wouldn't do that. i would just disable monitoring of the CPU fan.

Any particular reason for this?
post #4 of 12
If you have a Laing DDC-1T series pump, it can run off of the MOBO CPU header and supply the RPM tach feedback. Contact a pump maverick for further details. wink.gif
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post #5 of 12
Some other good pumps have rpm monitoring leads, if yours doesn't, then just plug a case fan into that header and be done with it.
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post #6 of 12
That pump could overload the mobo header. My DDC 3.25 uses TONS of current when it starts up and hates PWM (won't even start up), but it came with a separate 3-pin connector with just the tach line to plug into the mobo, uses a full size molex to power it. It works great that way. And the system will shut down if it doesn't sense the motor running; another plus.

On my D5-Var there is no tach output. So, I just disable the CPU fan in BIOS. I wish they did the D5's like they do the DDC pumps... and others. But I sure wouldn't plug it into the Mobo header either!

biggrin.gif
Edited by Tex1954 - 8/26/11 at 11:14pm
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post #7 of 12
Quote:
Originally Posted by bmaverick;14727572 
If you have a Laing DDC-1T series pump, it can run off of the MOBO CPU header and supply the RPM tach feedback. Contact a pump maverick for further details. wink.gif

The pump it self can run off the motherboard?
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post #8 of 12
Definitely do not hook the fan's power to the mobo header. That pump draws around 30w during spinup and will fry the header. Most headers only support 8-15w. Just hook up the tach monitor like everyone else has said.
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post #9 of 12
Alphacool D5 pump doesn't even come with rpm monitoring wire so your motherboard would still be complaining about missing cpu fan. Disable that warning or hook up some other fan to cpu fan header. More hardcore way is to add rpm monitoring wire to pump : http://www.xtremesystems.org/forums/showthread.php?234698-So-who-thinks-my-Aquaero-w-home-made-super-powerboster-will-work/page2 , then you can just plug that added wire to cpu fan header.
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post #10 of 12
I know the EXACT reason for this.

This is because the motherboard detects the absence of a CPU heatsink (fan), using a waterblock you don't plug a 4 pin PWN fan and without it the motherboard thinks a heatisink isn't installed.

And yes the pump can easily run off the motherboard.
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