Hello to you all
I've been asking this (and other) questions at HP, Suppliers and have a thread running over at http://forums.2cpu.com/showthread.php?t=95935.
The motherboard started life off as a Tyan S2915-E, but then HP got its hands on it and turned their version into the xw9400, along the way they changed a number of things.
The Service Manual for the xw9400 can be downloaded from http://h50146.www5.hp.com/lib/doc/manual/workstation/xw9400/xw9400strg_e_c00774787.pdf, but in the world of computer geekdom, the manual dosen't say much.
It has told me where the front PWR SW has moved to etc
On page 92 of the Service Manual we see figure 4-46, the CPU HSF and the 5 wires, the board advertising says PWM and Tachometer support. Else where I have read stories how some HP 4pin fans have two grounds and both have to be joined (so the fan is really just a 3-wire fan
as seen in figure 4-46 (the bracket=] is the guide at the back of the plug)
]o----- Yellow (PWM?)
.o----- Black (GND?)
.o----- White (tach/sense?)
.o----- red (12v?)
]o----- Black (GND?)
Xigmatech 4pin fan
]o-----bLACK gnd
.o-----RED +12V
]o-----WHITE sense (tach)
.o-----BLUE control (PWM)
So, to get my fans working I may need to re-wire them
Blue
black
white
red
black (bridge with pin#1)
Does anyone know?
Would you agree with my analysis?
Any other motherboard suggestions?
I've been asking this (and other) questions at HP, Suppliers and have a thread running over at http://forums.2cpu.com/showthread.php?t=95935.
The motherboard started life off as a Tyan S2915-E, but then HP got its hands on it and turned their version into the xw9400, along the way they changed a number of things.
The Service Manual for the xw9400 can be downloaded from http://h50146.www5.hp.com/lib/doc/manual/workstation/xw9400/xw9400strg_e_c00774787.pdf, but in the world of computer geekdom, the manual dosen't say much.
It has told me where the front PWR SW has moved to etc
On page 92 of the Service Manual we see figure 4-46, the CPU HSF and the 5 wires, the board advertising says PWM and Tachometer support. Else where I have read stories how some HP 4pin fans have two grounds and both have to be joined (so the fan is really just a 3-wire fan
as seen in figure 4-46 (the bracket=] is the guide at the back of the plug)
]o----- Yellow (PWM?)
.o----- Black (GND?)
.o----- White (tach/sense?)
.o----- red (12v?)
]o----- Black (GND?)
Xigmatech 4pin fan
]o-----bLACK gnd
.o-----RED +12V
]o-----WHITE sense (tach)
.o-----BLUE control (PWM)
So, to get my fans working I may need to re-wire them
Blue
black
white
red
black (bridge with pin#1)
Does anyone know?
Would you agree with my analysis?
Any other motherboard suggestions?