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H110 and custom PWM splitter


BlakBat

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Hello,

 

My mobo only has 1 CPU and 2 CHA fan connectors. The case is a 350D, the cooler a H110.

 

Currently the 2x 140 front intake (not PWM fans) are on CHA2 with a 3PIN splitter. The back fan (PWM) and the H110 fans (PWM) are on a single PWM splitter on CHA1.

The H110 3PIN connector is on the CPU1 connector.

 

If I make my own splitter for the CPU1 connector that consists of:

- the 12V/G of the 3PIN waterblock connected to a PSU molex,

- the sensor of the 3PIN waterblock connected to the CPU1 connector,

- and the V/G/Control of CPU1 connector connected to both H110 PWM fans,

 

Will the H110 fans be really PWM and increase RPM depending on the CPU load?

 

I'm assuming that the H110 sensor reports different values depending on CPU load, but I'm not sure of this.

 

Is my idea any good? Does someone have a better, simpler, idea?

 

Thanks

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Hello,

 

My mobo only has 1 CPU and 2 CHA fan connectors. The case is a 350D, the cooler a H110.

 

Currently the 2x 140 front intake (not PWM fans) are on CHA2 with a 3PIN splitter. The back fan (PWM) and the H110 fans (PWM) are on a single PWM splitter on CHA1.

The H110 3PIN connector is on the CPU1 connector.

 

If I make my own splitter for the CPU1 connector that consists of:

- the 12V/G of the 3PIN waterblock connected to a PSU molex,

- the sensor of the 3PIN waterblock connected to the CPU1 connector,

- and the V/G/Control of CPU1 connector connected to both H110 PWM fans,

 

Will the H110 fans be really PWM and increase RPM depending on the CPU load?

 

I'm assuming that the H110 sensor reports different values depending on CPU load, but I'm not sure of this.

 

Is my idea any good? Does someone have a better, simpler, idea?

 

Thanks

 

depends on the Board you have Look it up in the manual

In most cases Only the CPU Fan Header(s) sends PWM Signals

I have a R4BE that has 8 fan Headers (CPU+CPUOpt/fan1+Opt1/fan2+Opt2/fan3+Opt3/fan4+Opt4) And only the CPU Related Headers are PWM (They are all 4 pin connectors)

as for splitting PWM Control you just need the PWM (and Tach) leads connected and Provide 12V From your PSU to control them (I actually have 8 SP120 PWM Fans connected to My CPU fan header this way)

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depends on the Board you have Look it up in the manual

 

It's an ASUS H97M-E, manual says all 3 (CPU1, CHA1 AND CHA2) have PMW signals according to the diagram (pin 4 is never marked as "reserved")

 

The only mentioned caveats are:

- CPU1 only supports 1A (12W)

- Only 4PIN CPU fans supports ASUS Fan Xpert 2+ feature

 

Also, since this is an Asus mobo, all three connectors support Q-Fan control, which is basically where I get lost. (As if Asus would explain nicely how it affects PWM... those mobo manuels are still as bad as in the 90's). It seems to me that Q-Fan support can modulate the fans even if they are 3 pin.

 

I'm just trying to get the fans of the H110 to speed up when the CPU is working...

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It's an ASUS H97M-E, manual says all 3 (CPU1, CHA1 AND CHA2) have PMW signals according to the diagram (pin 4 is never marked as "reserved")

 

The only mentioned caveats are:

- CPU1 only supports 1A (12W)

- Only 4PIN CPU fans supports ASUS Fan Xpert 2+ feature

 

Also, since this is an Asus mobo, all three connectors support Q-Fan control, which is basically where I get lost. (As if Asus would explain nicely how it affects PWM... those mobo manuels are still as bad as in the 90's). It seems to me that Q-Fan support can modulate the fans even if they are 3 pin.

 

I'm just trying to get the fans of the H110 to speed up when the CPU is working...

Then you should indeed connect them to the CPU header

 

BTW This cable is A Nice one for Checking if PWM is working

http://www.gelidsolutions.com/products/index.php?lid=2&cid=11&id=63

it can connect up to 4 fans with PWM control

I am currently using this one

http://www.swiftech.com/8-WayPWMsplitter-sata.aspx

 

You should be able to select PWM Control from the Bios

 

If I am correctly you should be able to set a fan curve from Asus there AiSuite

(or Fan Xpert)

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