Hi,
I have a P5ND2-SLI. It has 3 plugs for the fans: cha_fan1, cha_fan2 and
power_fan.
I plugged both my chassis fan (3 pins) to cha_fan1 and cha_fan2. I
leave the power_fan alone since I don't use it.
What really annoys me is that only cha_fan1 is in use. Cha_fan2 is not
even mentionned in the ASUS probe display. Speedfan won't see it
either. Only the bios mentions it (and reports its rpm correctly).
I find it a bit much that on a 150quid mobo, asus didn't manage to
provide software that monitor its board properly.
Anyone knows of a solution?
TIA,
Steve.
A picture I saw in a review, looks like there is a ITE8712F
Super I/O chip in one corner of the board (you'll have to
verify that for me, as the picture I used was pretty crappy).
That chip has five fan monitor channels:
http://www.iteusa.com/product_info/file/pc/IT8712F_V0.8.2.pdf
Now, the problem is, two of the fan tacho inputs, are also used
if there is a game port present on the board. Since your board
does have a Game Port header, that means two of the tacho channels
are unavailable. That leaves three working channels. If you have
four fan headers, one of the fan headers doesn't have its tacho
input wired to anything. I would expect one of the CHA headers
is the dud.
The same is true of the fan control channels. There are five
channels, but if you have a Game Port header, then you can only
have three fan control channels. For QFan2, Asus likely only
controls two headers anyways (i.e. two headers have a MOSFET
next to them, for PWM fan control).
In terms of the monitor software, it is hard to monitor that
which cannot be used. Since there is nothing magic about
power_fan, you can connect your second chassis fan to it,
and use the monitoring on that channel. It is hard to say
whether the power_fan header actually has +12V on the header
or not, but I guess you'll know soon enough. If there is no
+12V available to spin the fan, get a disk drive power adapter
to provide +12V to the fan - with the right adapter, it is
possible to bring the tacho signal (single wire) to a separate
three pin connector - that three pin with the single wire can
then be connected to the power_fan header, for monitoring
purposes.
In this example adapter cable, the right most connector goes to
your chassis fan, the other three pin connector with the single
yellow wire, goes to the power_fan header, and the molex goes to
a disk drive power connector. This adapter is _only_ necessary,
if you find the chassis fan will not spin when connected to
power_fan:
http://www.bigfootcomputers.com/Mer...=PROD&Product_Code=2904CGWA&Category_Code=120
Just a guess,
Paul
