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Thread: Is my CPU running too hot at Idle temperature?




  1. #1
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    Default Is my CPU running too hot at Idle temperature?

    I have the ASRock Z68M/USB3 board with an Intel Core i7-2700K. I have the Cooler Master Hyper TX3 heat sink with two 92mm fans latched on. In my UEFI, the fans run at a maximum of 1,735RPM at level 1, 2,372RPM at level 5 and 2,800RPM at level 9 (maximum setting).

    But I suspect my CPU is running too hot at idle temperature. With my room temperature at 26C, my UEFI shows the temperature of the motherboard at 29C and my CPU at 40.5C at maximum CPU fan setting. When I drop the CPU fan setting down to 1, the board goes up to 31C and the CPU 42C.

    Is this a normal operating temperature for a 2700K with a room temperature of 26C? I suspect that a ΔT of 14.5C at maximum fan speed is too much, and I wonder if my application of thermal compound (I use Arctic Silver 5) allowed too much air to get through in the crevices between the CPU and the heat pipes?

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    Default Re: Is my CPU running too hot at Idle temperature?

    check temps in windows not in bios as the power saving features wont be working until windows is loaded hence higher temps,mine idles around 32c dont know what my room temp is though,use core temp or realtemp programs to check in windows

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    Default Re: Is my CPU running too hot at Idle temperature?

    Thank you for clearing that up. Someone at YouTube told me that his 2600K goes to 50C when in UEFI.

  4. #4
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    Default Re: Is my CPU running too hot at Idle temperature?

    Yep as Wazza said Uefi temps will be higher.
    Do you use the cpu temp control selection on the fans?
    If the fans support it
    CPU fan1 and 2 set em at level 5 for example and set the cpu temp at 50c then in windows as long as the cpu doesnt go over 50C the fans will stay at lvl 5 . If it goes higher they will speed up gradually.
    You can do the same with Chassis 1 fan
    Chassis 2 and 3 u just set manually and power fan header is full on unless the fan has a built in thermocouple/resistor.
    Cpu temps at idle in windows you can check with axtu,. They should be in the 7-10c above room temp range if your heatsink etc is connected ok.
    Current Systems:

    Asrock p67 Extreme6.............. Gigabyte EP-45 UD3 ...................... Gigabyte 73 PVM S2
    Intel i5 2500k 4.8ghz................ Intel Q8400 3.8ghz......................... Intel D820 2.8ghz
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  5. #5

    Default Re: Is my CPU running too hot at Idle temperature?

    Quote Originally Posted by CookyMonzta View Post
    I have the ASRock Z68M/USB3 board with an Intel Core i7-2700K. I have the Cooler Master Hyper TX3 heat sink with two 92mm fans latched on. In my UEFI, the fans run at a maximum of 1,735RPM at level 1, 2,372RPM at level 5 and 2,800RPM at level 9 (maximum setting).

    But I suspect my CPU is running too hot at idle temperature. With my room temperature at 26C, my UEFI shows the temperature of the motherboard at 29C and my CPU at 40.5C at maximum CPU fan setting. When I drop the CPU fan setting down to 1, the board goes up to 31C and the CPU 42C.

    Is this a normal operating temperature for a 2700K with a room temperature of 26C? I suspect that a ΔT of 14.5C at maximum fan speed is too much, and I wonder if my application of thermal compound (I use Arctic Silver 5) allowed too much air to get through in the crevices between the CPU and the heat pipes?
    as already stated, check windows software for temperatures. The BIOS doesn't use power saving mode.

    also, you will never come close to 14C on air or water. The lowest you can get is room temperature. If you ever get reports of lower than room temperature, then you need to update your monitoring program, or try a different one.

    If your temps are still high, then try reapplying thermal paste with the single drop in the center of the cpu about the size of a pea. Let it set for a while (I usual;ly let it set for an hour), as heat will thicken the paste and cause it to set too early and not allow proper distribution and not completely cover CPU. Never spread it out as it will ripple and trap air and air acts as an insulator making your CPU hotter.

    Here's a youtube video of the different methods and you can see why the pea method is one of the best.

    http://www.youtube.com/watch?v=EyXLu1Ms-q4

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    Default Re: Is my CPU running too hot at Idle temperature?

    I think you might have misunderstood my post regarding room temperature. In that test run, the difference between my room temp (26C) and CPU temp (40.5C) was 14.5C (the delta-T, ΔT). Last night, I had another test run in my UEFI. The room temp was between 22C and 23C, the board temp between 26C and 27C, and the CPU temp between 36.5C and 38C. As it stands, my board is usually 3-4C hotter than room temp, and my CPU 13.5-16C hotter.

    I imagine that, once I install Windows tonight, my average ΔT (the difference between room temp and CPU temp) will be a lot lower than 13.5C. And thanks for the advice on the thermal paste.

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    Default Re: Is my CPU running too hot at Idle temperature?

    Quote Originally Posted by kick View Post
    Yep as Wazza said Uefi temps will be higher.
    Do you use the cpu temp control selection on the fans?
    If the fans support it
    CPU fan1 and 2 set em at level 5 for example and set the cpu temp at 50c then in windows as long as the cpu doesnt go over 50C the fans will stay at lvl 5 . If it goes higher they will speed up gradually.
    You can do the same with Chassis 1 fan
    Chassis 2 and 3 u just set manually and power fan header is full on unless the fan has a built in thermocouple/resistor.
    Cpu temps at idle in windows you can check with axtu,. They should be in the 7-10c above room temp range if your heatsink etc is connected ok.
    I was about to ask you the same thing, regarding CPU target temp and fan settings. I made my first test run with my UEFI at its default settings (target temp 50C and fan at max. level 9). The 2 fans on my Hyper TX3 cooler spin at 2,716-2,800RPM at level 9, and are very loud. When I lowered my fan setting to 5, they spun at 2,307-2,372RPM, and were much quieter. My CPU temp went up by only 1.5C, but with the fan control knobs (for the other fans in my machine) increased from its minimum setting to midway, the temp came back down.

    Now, I have my target temp set at 48C. If my CPU goes above that number, I assume my machine will automatically bump the fan speed up from level 5 to level 6 or higher. Am I correct?
    Last edited by CookyMonzta; 01-28-2012 at 04:40 AM.

  8. #8
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    Default Re: Is my CPU running too hot at Idle temperature?

    Yes if you have a 4 pin pwm fan on cpu fan header 1 it will speed up gradually if the cpu goes over the temp you select ,nothing might happen until about 50C if you select 48C

    It wont go back to the speed /lvl you select until the cpu temp goes down to about 43-45.

    Its not a "48C warning warning all fans go to full power now!"..its a more gradual speed up and down in a10C range
    Current Systems:

    Asrock p67 Extreme6.............. Gigabyte EP-45 UD3 ...................... Gigabyte 73 PVM S2
    Intel i5 2500k 4.8ghz................ Intel Q8400 3.8ghz......................... Intel D820 2.8ghz
    Zalman 10x cooler.................... Coolermaster V8............................ HP cooler
    8GB Gskill ripjaw ddr3.............. 4GB Gskill PI ddr2.......................... 4GB samsung ddr2
    60GB ssd/500GB HDD .............. WD 1TB hdd.................................... Seagate 160GB hdd
    GTX 460 1GB x2 SLI ................. Msi 9600GT 512MB(died) ........... Onboard gx
    Win7 64 ,750w psu(ocz)............ Win7 64 ,520w psu,seasonic...... Win XP pro ,400w psu

    HEC 6A34 case . ....................... Jeantec R2 case............................ Packard Bell case

    hoping to upgrade to http://www.thinkgeek.com/stuff/41/habicase.shtml
    http://www.flixya.com/video/140325/Animal-launching

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    Default Re: Is my CPU running too hot at Idle temperature?

    With stock coolers and all processor cores working on full load (ic with many hours of videocoding) your room temperature could easily result in CPU temperatures of 50 degrees Celsius. At least mine with a 95 Watt CPU did during summer. I bought myself an overdimensioned cooler from a series adapted towards 125 Watts CPU and expect max temp to drop. At least this also worked on a very old S939 system of my son, when I changed the cooler from stock a to larger format (here the CPU reached at least 60, sometimes 65 degrees Celsius, which I found too much, now it is 40 Celsius max.... ). Please note that some types of stronger coolers blow sideways and no longer cool the capacitors etc around the CPU-socket. Then your CPU remains cool, while your capacitors and other onboard power elements are fried.... :-D on

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    Default Re: Is my CPU running too hot at Idle temperature?

    Heh, I wish mine was around 40, its idling is around 65 - which i guess isn't that great if max for the chip is 73

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