ASUS K8V and Pwr_Fan & Cha_fan connectors

  • Thread starter Thread starter Craig Matchan
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Craig Matchan

Hi all,

just wondering if anyone know why ASUS bothered to put the PWR_FAN and
CHA_FAN headers on the K8V motherboard and then not make then functional! I
thought I was going crazy when I hooked my the fan lead off the PSU to the
PWR_FAN header and ASUSProbe reported a 0 rpm. Finally after looking at the
manual where it details these fan headers is the following paragraph

Page 2-27 "The power fan (PWR_FAN) and chassis fan (CHA_FAN) hardware
monitoring function is not available on this motherboard"

I just find it odd that they would bother to put the headers on the board
when the board doesn't offer this function, unless the cost of re-tooling
the production run was more expensive than leaving on non functional
headers.

I've e-mailed ASUS tech support but somehow I doubt I'll get an
answer....well a usefull one :)

Craig
 
Craig Matchan said:
Hi all,
Click to expand...
Page 2-27 "The power fan (PWR_FAN) and chassis fan (CHA_FAN) hardware
monitoring function is not available on this motherboard"
Click to expand...

Umm, perhaps only MONITORING is not available, Im fairly certain they get
power.
 
Hi all,

just wondering if anyone know why ASUS bothered to put the PWR_FAN and
CHA_FAN headers on the K8V motherboard and then not make then functional!
I thought I was going crazy when I hooked my the fan lead off the PSU to
the PWR_FAN header and ASUSProbe reported a 0 rpm. Finally after looking
at the manual where it details these fan headers is the following
paragraph

Page 2-27 "The power fan (PWR_FAN) and chassis fan (CHA_FAN) hardware
monitoring function is not available on this motherboard"

I just find it odd that they would bother to put the headers on the board
when the board doesn't offer this function, unless the cost of re-tooling
the production run was more expensive than leaving on non functional
headers.
Click to expand...

Of course the headers are functions, just that they're not all connected
to the W83627HF sensor chip.
I've e-mailed ASUS tech support but somehow I doubt I'll get an
answer....well a usefull one :)
Click to expand...

Strange that because my Linux sensors programme is giving outputs for what
looks like two fans. They are both fairly reasonable speeds and vary a
little with time, as seems normal. I'm not entirely sure which is which
though. The limits show strange values as I haven't set them.

fan1: 5000 RPM (min = -1 RPM, div = 2)
fan2: 2986 RPM (min = 5273 RPM, div = 2)
 
Craig Matchan said:
Page 2-27 "The power fan (PWR_FAN) and chassis fan (CHA_FAN) hardware
monitoring function is not available on this motherboard"

I just find it odd that they would bother to put the headers on the board
when the board doesn't offer this function, unless the cost of re-tooling
the production run was more expensive than leaving on non functional
headers.
Click to expand...

The board does offer this function, but the function is not monitored,
i.e. the fan speed is not visible in monitoring programs.
 
Hi ,

Ok, so it looks like I just missinterpreted what the manual said then.
Thanks for the heads up everyone.

Craig
 
The board does offer this function, but the function is not monitored,
i.e. the fan speed is not visible in monitoring programs.
Click to expand...

Well, the CPUfan is visible in latest MotherboardMonitor 5 on my K8V, so
maby an upgrade of ASUS Probe will get this too?
 
Craig Matchan said:
Hi all,

just wondering if anyone know why ASUS bothered to put the PWR_FAN and
CHA_FAN headers on the K8V motherboard and then not make then functional! I
thought I was going crazy when I hooked my the fan lead off the PSU to the
PWR_FAN header and ASUSProbe reported a 0 rpm. Finally after looking at the
manual where it details these fan headers is the following paragraph

Page 2-27 "The power fan (PWR_FAN) and chassis fan (CHA_FAN) hardware
monitoring function is not available on this motherboard"
Click to expand...

And to top it all off, the manual is wrong. CHA_FAN is monitored in MBM5.
PWR_FAN is not. The Winbond sensing unit that Asus used on this board has
only two fan sensors.

Sick Willie
 
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