Re: a8n-sli cha1 fan no go go


"milleron" <millerdot90@xxxxxxxxxxxxxxx> wrote in message
news:lcl4g15qkmgm0aei5vvea09d30dk76ei9h@xxxxxxxxxx
> On Tue, 16 Aug 2005 16:05:38 +1000, "Dragoncarer"
> <wee@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
>
>>
>>"milleron" <millerdot90@xxxxxxxxxxxxxxx> wrote in message
>>news:4kh1g158f5rmlm1o6ndluceoie5rj0grnf@xxxxxxxxxx
>>> On Mon, 15 Aug 2005 22:10:59 +1000, "Dragoncarer"
>>> <wee@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
>>>
>>>>
>>>>"Pete M Williams" <postmaster@localhost> wrote in message
>>>>news:43006dc9$0$1290$ed2619ec@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>>>>>
>>>>> "Dragoncarer" <wee@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
>>>>> news:43006156@xxxxxxxxxxxxxxxxxxxx
>>>>>> OK, so I just installed two new fans into my case. Connected one to
>>>>>> the
>>>>>> 'cha1' fan port and one to the 'cha2' fan port. They have LEDs in
>>>>>> them.
>>>>>>
>>>>>> The cha2 fan is working - as in, it's spinning and lit up.
>>>>>> The cha1 fan is not. The LEDs are on, so it's getting juice, but it's
>>>>>> not
>>>>>> spinning. I think I've seen it spin - very slowly - just when I
>>>>>> booted
>>>>>> it
>>>>>> up once while the case cover was still off. Is it not spinning
>>>>>> because
>>>>>> the Mobo regulates that fan? The Mobo determines when and how fast to
>>>>>> spin the fan based on Mobo/ CPU temp? I assume it's that, but I wanna
>>>>>> check.
>>>>>>
>>>>>
>>>>> Just to rule out a faulty fan, have you tried swapping the two fans
>>>>> round?
>>>>>
>>>>
>>>>No, not yet. Thought I'd see if it was a more common occurence before I
>>>>go
>>>>back into that goddamned case and try fiddling around yet again.
>>>>I'm fairly sure it isn't, because like I said, I have seen it spin up a
>>>>little once.
>>>>
>>> On the A8N-SLI Premium, the CHA1 header is governed by Q-Fan whereas
>>> the CHA2 header is not. If you have a voltage reducer on that fan
>>> (like some Nexus models and some "temperature-controlled" models) AND
>>> Q-Fan is enabled, it simply may not be getting enough current to start
>>> (it takes more juice to start). Does any of this apply?
>>>
>>> Ron
>>
>>It's an Arctic Cooling PRO 2L...and has a little switch to select low,
>>medium, or high fan speed. I guess this could be something like a voltage
>>reducer, if that is how it would regulate the fan speed.
>>
>>If I plug it into the PWR_FAN slot, will it work? Or cause my computer to
>>explode in a fantastic, albeit expensive, display of razzle-dazzle sparks?
>>
>>Many thanks.
>>
>>I can't turn Q-Fan off. If I do, the CPU fan runs at max and sounds like a
>>small jet is preparing to take off in my computer case.
>>
> Yes, that little switch is exactly what I was talking about, and if
> you have it set on any position other than HIGH, it probably explains
> your problem. I'd suggest not plugging it in anywhere else. Just
> make sure that its 3-position switch is set on HIGH. That should
> allow enough current through to get it going. After that, Q-Fan can
> throttle it down. In theory, if that fan were set to low and then
> Q-fan throttled down the input voltage to 5V, you could be getting
> less than 1/4 of the maximum current to the fan at startup, and that
> may not be enough to overcome inertia and get it started. You should
> be able to test if this is the cause of your problem, though, simply
> by flipping the blades with your finger. If the fan continues to
> spin, you've established the cause. If that doesn't work, and the PWR
> header is the only one left, it should work fine there. If you have
> to plug it into PWR, then you DO want to use the fan's switch to
> regulate it's speed. On CHA1, leave it on HIGH (might work OK on MED,
> too) and leave the regulation to Q-Fan.
>
> As an example, in my rig, I have an Antec TriCool connected to a
> "fan-only" plug on my Antec TruePower II PSU. Even with that fan set
> on HIGH, it doesn't always start because the PSU, in trying to
> regulate it, isn't giving it quite enough current to start some of the
> time.
>
> Lastly, if your CPU fan at full speed sounds like a "small jet," I'd
> deduce that you have an extremely low-quality fan in that position.
> You might want to look into putting a Panaflo, Nexus, or Yate Loon fan
> in that position.
>
> Ron

It's the stock CPU fan. I've just disable Q-Fan, and both of my case fans
are now running. And the CPU fan is not as loud as it was when I first
installed everything...but it is quite loud.
This morning has been cold. When I started up the computer, jsut before,
Q-Fan had disabled the CPU fan entirely! My system was 27degC and my CPU was
about the same!

I'll try your recommendations regarding the high position for the case fan
and Q-Fan.
But, does the CPU fan always need to be on, even when the Mobo is detecting
such coldness?


.

Relevant Pages

  • Re: Strange fan behavior [longish]
    ... the fan voltage is not pulsed. ... "Application of PWM Fan Control": ... using the CPU Fan and Chassis Fan 1 connectors only". ...
    (comp.sys.ibm.pc.hardware.chips)
  • Re: Strange fan behavior [longish]
    ... the fan voltage is not pulsed. ... Another reason why you would avoid direct PWM is that a typical ... using the CPU Fan and Chassis Fan 1 connectors only". ...
    (comp.sys.ibm.pc.hardware.chips)
  • Re: a8n-sli cha1 fan no go go
    ... I've just disable Q-Fan, and both of my case fans ... And the CPU fan is not as loud as it was when I first ... Whether you're using Q-fan or a hardware fan controller, ...
    (alt.comp.periphs.mainboard.asus)
  • Re: XP SP2 hangs at "Windows is Shutting Down..."
    ... > I did have an overheating problem before. ... The CPU fan quit on me. ... the file and make a bootable floppy or cd with it. ...
    (microsoft.public.windowsxp.general)
  • Safe Mobo and Hd Temps, Relying on Heatsink Alone?
    ... Hardware newbie Qs on component temperatures. ... and speed fan) on an Asus M2V Mobo, a passive Ati X300 video card, 4 GB ... CPU fan only kicks in, should the machine start heating seriously. ... Howabout the HD and Mobo temps, though, what is ...
    (comp.sys.ibm.pc.hardware.systems)