kony said:
Slower speeds that what?
As mentioned above, this is a motherboard flaw. Take same
fan a motherboard can't sense and hook it up to another
board demonstrating it can sense in that range and it should
give the desired result.
I wanted accurate reporting for cpu fan monitoring. I did find a program
that works with percantage of fans capability and throttles nicely.Even a
Zalman .25 with its resistor got controlled.It just doesn't report slow, and
it bugs me. I am accurately guessing for synchronization via fans last
reporting rpm and relating it to percentage of rpm.(seems to be working: I
want a dead silent system cheaply.)
How are you limiting the RPM? The power (positive) is the
rail that needs limited, leave the ground continous and the
RPM has to go to the motherboard- some bay types of fan
controllers have the 3-pin plug but may not feed the RPM
signal back to the motherboard. It is easily enough checked
though, by simply trying a higher RPM fan.
I am using standard 3-pin and mobo. The 80mm will not report below 2100 rpm,
unless I used the Zalman .25 on its resistor (1900).I am using mobos pwm
and software to control.
If you have data on your specific make and model of
motherboard, what the lowest RPM it can detect is, please
mention it here as someone else may find this of use later.
I am using ms-6728 platinum (865pe chipset) 9/29/2004 bios date (no updates)
by microstar
The oem intel cpu fan (heavy duty) and smaller .14 reports to around
1000rpm, although the .14 intel reported even lower.
the "big one" (.16 heavy duty, comes with copper core heatsink) only went to
1100. the .14 went a bit lower, but the heat never allowed it to go low
anyway.
Is your board reducing fan RPM through PWM, a la intel 4 pin
fan plug? That might be why?
It is reducing through pwm, and a "core cell" chip by msi (microstar
international).and software. I gave up core center software (I dont want to
overclock... EVER) and went to "speed fan" software.
Possibly you have chosen too low a fan RPM? Seldom is it
necessary to reduce fan RPM below 1000. By choosing a
higher default RPM, the minimal threshold is higher.
The Fans could go to nearly off, with the same thermostat (for heat) setting
of 70 F for the room.The other end of spectrum, I haven't needed more than
2000 rpm anywhere in system (total of 3 fans, i will do no more. In fact I
may take it back to two, with the custom cooling I have coming through the
mail at this moment....).The Very Full ATX I am running is by far the most
stubborn mobo to cool ever in my antec 2600case.
My 70 degree room, with simply a thermostat off by 3+/- F obviously affects
the pc. Where I live, +40 F into single digits F outside temp in < 24hrs is
very common. The heat really gets going to keep up. My pc's pansiness
doesn't (as usual) I'm on my 8th pc and 3rd apt with again, a different type
of heat, same result.I have even destroyed a pc because of it, with "thier"
proper setup and believing it will work.(No REfund!) I have resorted to
custom cooling ever since, among some other little things.
What brand is the Intel fan (should be on it's label)?
Nidec or Sanyo? You might try a fan from the same
manufacturer, even same family if all else fails.
The smaller one I just sold with a system, the larger is a Sanyo Denki .16a.
I do not use it though, I went to reverse cooling with a intel copper core
heatsink and 80mm, and got awesome silent results (and I'm not even done
yet, the better cooler hasn't arrived with duct work to match).
Thanks for helpful reply.I will just go with what I got, it is not a
failure, just some annoyances (again, "as usual").
