Hi everyone,
how to simulate a fan (to fool the computer) on a 3 pin system fan connector (ground-+12V-sensor)?
Thanks.
how to simulate a fan (to fool the computer) on a 3 pin system fan connector (ground-+12V-sensor)?
Thanks.
Measure the DC resistance on the gnd/12V leads from the fan and match it with a fixed resistance maybe? Worth a try.
Are you trying to get the computer to not give you the "CPU fan fail" warning at boot?
Look in the bios settings for a setting about CPU fan check and disable if possible.
Look in the bios settings for a setting about CPU fan check and disable if possible.
Bios settings, or use the speed signal from another fan in the system. Or use an oscillator to fake a signal.
Hi guys,
I once solved the problem with a resistor between sensor and ground. It does not seem to work this time.
Exactly.
That´s not an option in this custom-made BIOS/MoBo.
I once solved the problem with a resistor between sensor and ground. It does not seem to work this time.
dangus and stinius,
interconnecting the sensors of system fan and processor fan (which is active) would be a simple enough solution.
interconnecting the sensors of system fan and processor fan (which is active) would be a simple enough solution.
If you have an extra fan and your motherboard can use speedfan, just connect the extra fan and set speedfan to auto disable to fan after booting into Windows.
That's what I do anyway. My mainboard is also OEM with no option to disable CPU fan warning. And I have a Scythe Ninja to run fanless an undervolted A64 with.
That's what I do anyway. My mainboard is also OEM with no option to disable CPU fan warning. And I have a Scythe Ninja to run fanless an undervolted A64 with.
Hi,
no success yet, fan speed control is very problematic these days...
Fan Speed Control is Cool! - Maxim
http://pdfserv.maxim-ic.com/en/an/AN1784.pdf
no success yet, fan speed control is very problematic these days...
Fan Speed Control is Cool! - Maxim
http://pdfserv.maxim-ic.com/en/an/AN1784.pdf
stinius,
I have a 4-wire processor fan working nicely and a 3-pin system fan connector, however, I rather need a small 2 terminal fan for the video card. Interconnecting the speed sensor outputs did not help. A hardware solution would be preferable.
I have a 4-wire processor fan working nicely and a 3-pin system fan connector, however, I rather need a small 2 terminal fan for the video card. Interconnecting the speed sensor outputs did not help. A hardware solution would be preferable.
Hi
As I told you here you will need to make a circuit that “simulates” a fan, on the control pin.
It’s as simple as a 555 with some extra components. I can email you the circuit if you drop me an email.
You can also try it by putting a square (digital) signal on the control pin, in the 35Hz to 150Hz range.
Cheers
Stinius
stinius,
file successfully received and viewed, looks very promising. Very kind of you, thanks again. I`ll tell you the outcome.
file successfully received and viewed, looks very promising. Very kind of you, thanks again. I`ll tell you the outcome.
stinius,
the circuit and everything else is working superbly. Thanks to everyone, especially you!
the circuit and everything else is working superbly. Thanks to everyone, especially you!
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