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Thread: CPU Fan starts for a second or two, then just stops.

  1. #1
    >:( magneticman's Avatar
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    Unhappy CPU Fan starts for a second or two, then just stops.

    I recently upgraded my system and have a seriously annoying problem. I have tried two fans now, the stock intel one and a zalman. Both start for a second or two at slow speed then as the system boots up they stop. I atached the fans to the sys. fan slot ans via molex and both times they worked. Could this mean that the moptherboard is at fault?

    My system

    Intel core 2 duo E6300
    Gigabyte GA-965p-DS3
    Corsair XMS2 1gb
    nVIDIA 7950 GX2
    hiper 580w PSU

    please help

    *the PC does still boot into the OS just in case you needed to know that...
    Last edited by magneticman; 07-09-2006 at 12:18 PM.

  2. #2
    Moderator chuckskull's Avatar
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    Sounds like the fan is set to stop below a certain temp (common on most motherboards). and you have the temp set wrong. check in the BIOS under PC health settings or soimething similar.

    All fan spin at max for the first few second then take a speed from the BIOS usually.

  3. #3
    Senior Member FatalSaviour's Avatar
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    Sounds like it may not be a problem at all to me either.

    It quite possibly just a Quiet Fan feature that the mobos got, whereby the fan doesn't spin until the CPU reaches a certain temp, and then increases incrementally as the temp increases.

    As it's a Conroe, it's increasingly likely that this is the case as they're cool (literally) chips.

    There should be an option to disable Q-Fan or whatever the GB equivalent is, and you should then be able to see whether this is indeed what's causing it.
    Quote Originally Posted by Noni
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    Senior Member ExceededGoku's Avatar
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    yes if you disable the fan controller in the bios (under the PC health), its because the damn motherboard sets the RPMs too low if the CPU is not hot (by hot I mean like 80oC- lol)
    Core 2 Duo E6600 @ 3.2Ghz (400Mhzx8) 1.52V (set in bios, 1.47v real) | 4GB GeIL PC6400 4-4-4-12 | Gigabyte DQ6 @ 1600Mhz | HD2900XT 1GB | Enermax Infiniti 720W | Silverstone TJ07-B with custom watercooling | BenQ FP241WZ
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    That's normal for a Core 2 Duo setup. What are the temps showing in the bios? I'm sure they're fine and as it gets warmer they'll spin up.

  6. #6
    >:( magneticman's Avatar
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    Thank you for your replies, I have left my system on for a while and the fan didn't spin up even when speedfan was showing the processor at 50/60 something degrees...

    and Goku, what do you mean by disabling the fan controller? I didn't see any option like that under PC health, and I see you have the DQ6 (which is from the same family) so could you help?

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    Senior Member ExceededGoku's Avatar
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    Quote Originally Posted by magneticman
    Thank you for your replies, I have left my system on for a while and the fan didn't spin up even when speedfan was showing the processor at 50/60 something degrees...

    and Goku, what do you mean by disabling the fan controller? I didn't see any option like that under PC health, and I see you have the DQ6 (which is from the same family) so could you help?

    The fan control method should be disabled
    Core 2 Duo E6600 @ 3.2Ghz (400Mhzx8) 1.52V (set in bios, 1.47v real) | 4GB GeIL PC6400 4-4-4-12 | Gigabyte DQ6 @ 1600Mhz | HD2900XT 1GB | Enermax Infiniti 720W | Silverstone TJ07-B with custom watercooling | BenQ FP241WZ
    3dmark05 - 13140 | 3dmark06 - 6698 | SuperPi 1M - 15s

  8. #8
    >:( magneticman's Avatar
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    • magneticman's system
      • Motherboard:
      • Asus P6T Deluxe
      • CPU:
      • Core i7 920 @ 3.5ghz
      • Memory:
      • 3x2gb Corsair Dominator 1600mhz
      • Storage:
      • 1TB F1 + 2TB F3
      • Graphics card(s):
      • Asus GTX 560Ti DirectCU II
      • PSU:
      • Corsair HX750W
      • Case:
      • Lian-Li PC-V2110
      • Operating System:
      • Windows 7 Ultimate
      • Monitor(s):
      • Dell 2408WFP
      • Internet:
      • BT Infinity
    yeah the header's whacked

    ah well I got a splitter and connected it to the sys. fan slot.

    Thanks for the help guys and btw, it was the motherboards temperature that got near 50 no the cpu, it doesn't even go further than 40c...

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