BIZARE fan controller problem.

i've just installed a hardcano13 fan controller - it works great for
controlling my 3 case fans either manually or automatically, the problem
is any manual adjustment i make on either fan also alters the speed of
the cpu fan..... which is not actually connected to the hardcano!!???!!
wtf is going on??!?!?? is my hardcano using the force to control the cpu
fan....???

the cpu sink is a thermaltake polo735 with the 2 power wires connected
to its own manual controller on a PCI bracket (which still works..) and
the yellow rpm wire plugged into the mobo. i tried disconnecting the rpm
wire, same result, and disconnected the hardcano's usb card reader from
the mobo, thinking that might be sending some signal, but same result.

confused.

 

I bet you're confused. So am I. That's a really strange one, sorry, can't
help.

 

If the CPU fan speed changes in the opposite direction when you alter the
case fans, then perhaps

when you slow the case fans, the air entering the CPU heatsink is warmer, so
the CPU fan speeds up

when you speed up the case fans, the air entering the CPU heatsink is
cooler, so the CPU fan slows?

Read your motherboard manual, and look for information about the system
health monitoring chip. Also, use a program like MotherBoard Monitor. Then
you should be able to understand what's up.

--
Phil Weldon, pweldonatmindjumpdotcom
For communication,
replace "at" with the 'at sign'
replace "mindjump" with "mindspring."
replace "dot" with "."

 

....sounds logical but the cpu fan has 3 distinct configs, its jumpered
so that heat change won't automatically change speed, it can only run
manually as it has in the past

mmmk. *i have fixed it* but am still not sure why it was happening
exactly.... what i did was simply use a different PSU power lead going
into the fan controller, now i'm using a lead that doesn't have the CPU
controller on the same power chain from the psu. now it has no effect on
the CPU fan.

?.

how was some sorta fan control signal being sucked back through a power
lead...?

even more confused.

 

The speed of the CPU fans was probably changing when they were on the same
wire because the Voltage across them was changing as the draw by the fan
controller varied - I wouldn't have thought a fan controller could draw
enough to cause a Voltage drop but that's the only reasonable explanation I
can think of...

Ciao...

[UK]_Nick...

 

Sounds like the current spikes from one controller were being injected into
the other one causing it's control circuit to fire at the wrong times.