Question about Adaptec Smart Cooling (ACC-9700) CPU Fan, Cooling Fan

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Thermostat question... I've got the Adaptec Smart Cooling Fan. I've got the power cable connected to the motherboard. However, I don't know where to hook up the thermostat cable. I have an ASUS A8N5X motherboard. Thanks! -taulce1

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Re: Thermostat question...

Hi place it far from the motherboard soo it wont start or opreate all the time (warm place) although there isnt any problem that it will work all the time soo it dosent really matter.... good luck

Posted on Mar 21, 2006

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What is the proper rpm for the 80 mm cooling fan and also the 90 mm cooling fan for the HP Amd Athelon II? I am trying to diagnose this with a monitoring software package. It tells me what the rpms are...

Trace the power wire from the fan back to where it connects to the motherboard. Below where the wire is connected it should be labled on the board what fan it is.

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How do i connect the fan to the power supply?

Most fans use a standard 3-pin plug, and if you look closely at the motherboard you'll probably find a spare 3-pin header or two marked "case fan" or "system fan" where it will connect. Most motherboards have an extra header or two for additional fans. Note that this is not the same place where the CPU fan plugs in. That connector should be used for the CPU fan only. If your motherboard only has a single system fan header (common on the small micro-ATX format boards used in most consumer machines), and it already has a fan connected, you can get an adapter like this one to split the power connection.

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My computer was in the shop for something unrelated to this problem and now that I have it back it (the cpu fan) sounds like I'm running a vacume it's that loud.

Hi Tim,

I can not say for sure that this is whats happening, but from your description, it seems logical.

After work is done on a computer, sometimes one of the ribbon (data) or power cables isn't completely secured. It can move around within the case, especially if it is transported (like back from a shop).

On occasion one of the cables comes in contact with a CPU fan (or any of the fans in a computer).If it does, the noise they make is horrendous.

Fortunately, the fix is easy. Get a flashlight and a screwdriver.
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  • Locate the noise source if possible paying attention to the areas around the fans.
  • When you find it switch off.
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If this turns out not to be the problem, please comment back with more detail.

Best regards


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I have a dell xps 1210 the cooling fan stopped working I replaced it with a new one and it still won't work

The motherboard may have several 3-pin connectors, for installing fans in different places. Connect the cooling-fan to one of those "alternate" connectors, and start-up your computer, to see if the fan spins.

Try a different power-supply.

Try both the "old" and "new" cooling-fans in a different motherboard, to see if they spin at all.

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thats the USB header and that goes into your motherboard USB ports wihch are typicall yon the bottom.

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My motherboard isn't turning on my cpu fan, how do i fix that ? i just traded cases and power supplies. The mother is out of an old compaq 6010ca

Obviously the power is not reaching the fan. check the power socket for the fan with a multimeter. If there is power at this end then it is the fan that may not be connecting properly to the power cable. There are always two such cables that can be connected to the fan. Try the other one.

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It would be really unusual for the power connector to fail. Perhaps there is a loose wire in the fan connector that comes loose when you try to connect it to the motherboard.

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Check the Following:

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