Question about SuperMicro H8DAE Motherboard

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H8DAE-0 Fan issues, stopping and starting.

I have an H8DAE-0 board installed in my system and the fans will come on for a few seconds and then stop. I checked the BIOS and it is set for continuous fan power. The fans only kick in when the system is starting to overheat (72C) and then stop right afterwards. Lowering the overheat temperature is not an option. I have another system with the same components and its fans run all the time. I have double-checked the power connections and all the fans are plugged in independently so I don't think the fans themselves are an issue. There are stand-offs under the board so I'm fairly sure that it's not a short happening under the board. Any suggestions are greatly appreciated.

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  • Mike
    Mike Aug 22, 2007

    Well the kicker of the whole thing is that the motherboard IS reading the temperatures correctly and tells me when the fans are on and the RPM they are at.

    It will display the temperature slowly creeping up to 72C (overheat temperature in the BIOS) and then the fans kick in and lower the temperature to around 55-60C, then shut off and repeat the cycle. Meanwhile, the system stays on and operates just fine so I'm not too sure of it being a processor fault.

    However, I'm still leaning to agree with you that it is a motherboard issue of some kind and I will swap it out when I get a chance and post back the results. Sadly I was secretly hoping for an easy answer like a jumper configuration of something. :D

  • Mike
    Mike Aug 29, 2007

    Although this was probably the toughest motherboard I've ever had to replace thanks to the 3 power supplies, 6 fans, cooling assembly and air cowl, the motherboard change did indeed take care of the problem. Thanks!

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Sounds as if you have a motherboard fault or a processor fault, as, if the processor is faulty, everything will stop, especially if the temperatures arent being read correctly by the motherboard causing the system to shut down before any damage is done.. It's a process of illimination i'm afraid

Posted on Aug 22, 2007

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