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Thread: GA-H55M-S2H mobo seems to spin case fan abnormally slowly




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    Default GA-H55M-S2H mobo seems to spin case fan abnormally slowly

    Hi, I just built a PC with a GA-H55M-S2H motherboard and a GZ-X2 case. The CPU seems to idle at a decent temperature (27C) with the fan at 1600 RPM but the case temp is 41C at 830 RPM according to HWMonitor. I haven't yet added an intake fan so as far as case cooling goes it is just the case's exhaust fan and the PSU fan. Therefore, I would expect the case fan to spin faster to compensate. Moreover, there doesn't seem to be any way to adjust the fan speed; the BIOS obviously spins it slow as well as EasyTune6. I would use SpeedFan but it doesn't seem to be reading temperatures correctly in this rig. Likewise with EasyTune, which says the CPU is running at 16C (which is cooler than room temperature).

    So I guess my questions are:

    1) Are these normal temperatures (27C CPU and 41C case)?

    2) What software will most accurately read this mobo and the core i3 processor? HWMonitor seems the most realistic; CoreTemp, SpeedFan, and EasyTune6 all seem off.

    3) Is it normal for the mobo-controlled case fan to only spin at 830 RPM like that? Is there some setting I missed in the BIOS to speed it up a little?

    4) This is a home server that basically sits idle most of the time, but the BIOS had the CPU fan spinning way faster than necessary and it was pretty loud, that's why I installed SpeedFan and then later EasyTune. Any ideas for a tool to dynamically adjust the fans that will work with this mobo and CPU?

    Thanks!!

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    Default Re: GA-H55M-S2H mobo seems to spin case fan abnormally slowly

    where on the mb did you connect your case fan too? and is the fan a 3pin or a four pin pwn fan??? lavelys everest will tell you everything you need to know regarding temps ect,download it from here


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    Default Re: GA-H55M-S2H mobo seems to spin case fan abnormally slowly

    You may need to set your BIOS to voltage instead of PWM, or move the case fan to another header if possible. Sometimes the case fan header is slow, so if this is your only header you may need to use a molex to fan connector and put your case fan on that.

    Or get an additional intake fan and connect via header or molex, which you should do anyway as this will help for sure.

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    Default Re: GA-H55M-S2H mobo seems to spin case fan abnormally slowly

    Quote Originally Posted by wazza300 View Post
    where on the mb did you connect your case fan too? and is the fan a 3pin or a four pin pwn fan??? lavelys everest will tell you everything you need to know regarding temps ect,download it from here
    http://www.lavalys.com/sites/default...js9wgrvd_0.zip
    Hi, thank you for replying. I connected the case fan to the SYS_FAN header. The header has four pins and the fan has three. I still don't understand PWM vs. voltage yet, but two things struck me while researching this just now. First, while the BIOS has settings for "Smart Fan Control" (varies the fan speed based on CPU temps), it doesn't have similar settings for the case fan. Second, the motherboard manual shows differences between the pins of CPU_FAN and SYS_FAN.

    Code:
    CPU_FAN:                                     SYS_FAN:
    Pin No. Definition                           Pin No. Definition
     1       GND                                  1       GND
     2       +12V / Speed Control                 2       +12V / Speed Control
     3       Sense                                3       Sense
     4       Speed Control                        4       Reserve
    I'm not sure what "Reserve" means, or if it's a typo in the manual. But I do know that SpeedFan was able to vary the speed of the case fan, so it can be done.

    Does that tell you anything about what's going on with the slow case fan?

    As far as reading temperatures, Everest is very helpful. It seems to correctly identify every sensor in the computer! It still reads the CPU temp wrong, but I was able to use it as a Rosetta stone to translate what the EasyTune values meant. Here, check this out:



    Based on this, it looks like each CPU core reports its own temperature, but the motherboard also reports a CPU temperature? So CPU in Everest = TMPIN2 in HWMonitor = CPU in EasyTune -- but all three programs report a bogus value (15C)! It would seem that the core temps are more accurate, but EasyTune at least doesn't seem to detect individual core temperatures, it only seems to track that other CPU temperature, which is invalid.

    Anyway, thanks for reading all this and for helping.

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    Default Re: GA-H55M-S2H mobo seems to spin case fan abnormally slowly

    Quote Originally Posted by Lsdmeasap View Post
    You may need to set your BIOS to voltage instead of PWM, or move the case fan to another header if possible. Sometimes the case fan header is slow, so if this is your only header you may need to use a molex to fan connector and put your case fan on that.

    Or get an additional intake fan and connect via header or molex, which you should do anyway as this will help for sure.
    You know what's weird is that the BIOS only has a PWM / Voltage setting for the CPU fan, not the case fan. Under the BIOS or EasyTune control it always seems to spin at the same slow speed. But SpeedFan was able to vary its speed just fine. Like I said, I'd use SpeedFan but unfortunately it's not reading temperatures accurately.

    That's a good idea to use another header but there's only the two on the motherboard. I guess if all else fails I'll have to put it a molex connector like you said, or more likely get a different molex fan with speed control, since under molex power the current fan will go full blast, right?

    The drives are running kind of hot so hopefully things will cool down once they get their own fan in front.

    Thanks!

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    Default Re: GA-H55M-S2H mobo seems to spin case fan abnormally slowly

    CPU temps look correct to me, based on your current voltages and core temps.

    Because this is a cheaper/smaller board you have less BIOS options and features, that is why you cannot change SYS_Fan in the BIOS.

    Ya, a molex will run full speed of the fan without a controller, depending on the fan that might be ok though.

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