What is that blue wire from my power supply??

  • Thread starter Thread starter matt8500
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matt8500

I have an Antec True Power TP3-550 power supply and it has a thin blue
wires that end with 3 prongs (I think these are female). Anyone know
what this is for? Thanks.
 
That's it! Thank you!

Does that get plug-in to the mother board or a fan? My mother is an
Asus P5N-D. I'm assembling the PC and my room is a mess. I can't
find the motherboard manual.
 
Does that get plug-in to the mother board or a fan?  My mother is an
Asus P5N-D.  I'm assembling the PC and my room is a mess.  I can't
find the manual.
Click to expand...

More info. I found the manual. If that wire gots to the motherboard,
there are 3 possible locations. These are marked: CHA_FAN1, CHA_FAN2,
and PWR_FAN. Does the wire go into the PWR_FAN? Thanks.
 
Robin said:
That's all true, and no doubt the m/b might do something with the
signals, but on my ASUS P5E3 neither the BIOS nor ASUS's Probe
software monitors the pwr_fan socket. I connected the Antec lead to a
cha-fan socket.
Click to expand...

What you can do, is download the datasheet for the hardware
monitor chip, and see how many measurement channels it has
for fan RPMs. Sometimes, it is possible to predict in
advance, that one of the headers will be unable to measure
anything (more fan headers than channels).

(Page 28 - five "fanin" signals)
http://www.winbond.com/NR/rdonlyres/7885623D-A487-4CF9-A47F-30C5F73D6FE6/0/W83627DHG.pdf

That chip has five channels for RPM measurement, of which
two have dual definition pins. Three channels are definitely
available for measurements. A fourth can be used without
too much trouble (the alternate definition is a GPIO pin).
The fifth channel pin, is also used for a serial flash
interface, so if there is a serial flash chip on the
board, that channel may be "hijacked" for interfacing
to flash.

In any case, the user manual for P5E3 shows six fan
headers, and there are a maximum of five measurement
channels on the Winbond chip, so the Asus manual
is wrong. One of the headers should have the "Rotation"
label removed, as the pin obviously cannot be connected
to the hardware monitor. No channels left.

Paul
 
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