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Thread: Gigabyte G41M-Combo Vcore BIOS setting does not work




  1. #1
    blacktruth is offline Junior Member
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    Question Gigabyte G41M-Combo Vcore BIOS setting does not work

    Greetings,


    I recently purchased a G41M-Combo motherboard and I am discovering that Vcore setting in BIOS does not work!
    I have everything set to defaults for safety and only tweak the voltage settings in M.I.T.:



    CPU Vcore: 1.250 (higher than 1.150 which is the default for my CPU)
    CPU Termination: 1.200 (the default value)


    DRAM Voltage: 1.500 (the default value)



    I save and exit, then after rebooting I enter the PC Health Status to verify everything is ok.
    The Vcore sensor reports a value near 1.250 so I assume that the Vcore is set ok.
    HOWEVER, after I boot into Windows or Linux, I discover that my Vcore is back to its default value!
    Which is a little less than 1.150.

    I have tried with both the FA and FB BIOS revisions with the same results.

    Any ideas as to why this is happening? What can be done to fix it?

    Thanks!
    Last edited by blacktruth; 09-01-2016 at 07:45 PM.

  2. #2
    profJim's Avatar
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    Default Re: Gigabyte G41M-Combo Vcore BIOS setting does not work

    Welcome to the forum.

    There is nothing to fix, your motherboard is performing normally because several bios settings are enabled.

    From the v:2.0 motherboard user manual, on page 29:

    CPU Enhanced Halt (C1E) (Note)
    Enables or disables Intel CPU Enhanced Halt (C1E) function, a CPU power-saving function in system
    halt state. When enabled, the CPU core frequency and voltage will be reduced during system halt state
    to decrease power consumption. (Default: Enabled)

    C2/C2E State Support (Note)
    Allows you to determine whether to let the CPU enter C2/C2E mode in system halt state. When enabled,
    the CPU core frequency and voltage will be reduced during system halt state to descrease power consumption.
    (Default: Disabled)

    CPU Thermal Monitor 2 (TM2) (Note)
    Enables or disables Intel CPU Thermal Monitor (TM2) function, a CPU overheating protection function.
    When enabled, the CPU core frequency and voltage will be reduced when the CPU is overheated.
    (Default: Enabled)

    CPU EIST Function (Note)
    Enables or disables Enhanced Intel SpeedStep Technology (EIST). Depending on CPU loading, Intel
    EIST technology can dynamically and effectively lower the CPU voltage and core frequency to decrease
    average power consumption and heat production. (Default: Enabled)

    (Note) This item is present only if you install a CPU that supports this feature. For more information about
    Intel CPUs' unique features, please visit Intel's website.


    My advice:
    Never disable CPU Thermal Monitor (TM2), it's there to automatically prevent your cpu from being damaged if the cpu is overheated.
    Q9650 @ 4.10GHz [9x456MHz]
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  3. #3
    blacktruth is offline Junior Member
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    Default Re: Gigabyte G41M-Combo Vcore BIOS setting does not work

    Hello profJim, glad to be here. I was happy to see a reply that mentions some BIOS settings I could try. The only problem is, it's the first thing I tried. Those "four consecutive settings under Advanced BIOS setup" because I know they mess with frequencies and voltages. I disabled all of them (even the thermal protection as I have more than adequate cooling). Sadly, the problem persists. To be honest, I am really starting to worry that it is not fixable. Unless there's something I am missing here. :-(

  4. #4
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    Default Re: Gigabyte G41M-Combo Vcore BIOS setting does not work

    Did you load Optimized Bios Defaults before you made any bios changes?
    If the answer is no, load the Optimized Defaults and then make your bios changes.

    After you completed your bios changes, did you use the Save Bios Settings and Exit Bios option?
    There are two ways to do this in the bios; by PF key 10 or by selecting the Save & Exit Setup option in the left column of the main bios screen.
    Whichever one you used, try using the other option.

    After saving the settings, does your system immediately start to post after your system shuts down momentarily after changing the bios?

    Why do you want to set the CPU Vcore much higher than the default value for your cpu?


    We need detailed information about ALL OF THE HARDWARE in your system.

    We can best help you after you create a detailed hardware list in the System Specs
    portion of your forum profile at the bottom of the profile page or in your forum signature.
    Be sure to include brand names and model numbers.
    When you are done editing or creating your hardware list, save the settings.

    If you do not provide a detailed list, you are wasting your time and ours.
    Q9650 @ 4.10GHz [9x456MHz]
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    Seasonic SS-660XP2 80 Plus Platinum psu (660w)
    WD Caviar Black WD6401AALS 640GB (data)
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    SLI @ 16/4 works when running HyperSLI
    Cooler Master 120XL Seidon push/pull AIO cpu water cooling
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    Asus VH242H 24" monitor [1920x1080]
    MSI N460GTX Hawk (1GB) video card
    Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium
    HT|Omega Claro plus+ sound card
    CyberPower CP1500PFCLCD UPS
    E6300 (R0) @ 3.504GHz [8x438MHz] ~~ P35-DS3L [rev: 1.0] ~ Bios: F9 ~~ 4x2GB Kingston HyperX T1 PC2-8500, 876MHz @4-4-4-10
    Seasonic X650 80+ gold psu (650w) ~~ Xigmatek Balder HDT 1283 cpu cooler ~~ Cooler Master CM 690 case (RC-690-KKN1-GP)
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    HT|Omega Striker 7.1 sound card ~~ Asus VH242H monitor [1920x1080] ~~ Logitech Z-5500 Digital 5.1 Speakers
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  5. #5
    profJim's Avatar
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    Default Re: Gigabyte G41M-Combo Vcore BIOS setting does not work

    On rare occasions, a bios can act flaky and does not work correctly.

    When this happens, a common fix is to:
    1. turn off your system
    2. unplug the power supply's A.C. cord from the wall outlet
    3. press and hold the front panel power switch for 10 - 15 seconds
    4. carefully jumper the two CLR_CMOS pins for 15 seconds*
    5. if used, remove the jumper block from the CLR_CMOS pins
    6. turn on your system and immediately enter the bios
    7. load optimized bios defaults
    8. save settings and exit
    9. immediately go into the bios again and load one of your saved bios profiles

    * sometimes you might need to jumper the CLR_CMOS pins for several minutes or possibly longer

    One time my overclocked system rebooted suddenly and during POST my cpu speed showed the default speed. When I went into the bios I couldn't overclock my cpu by even 1 MHz. I performed the bios CMOS clearing procedure and I was then able to reload my stable, overclocked bios profile and everything was fine.
    Q9650 @ 4.10GHz [9x456MHz]
    P35-DS4 [rev: 2.0] ~ Bios: F14
    4x2GB OCZ Reaper PC2-8500 1094MHz @5-5-5-15
    MSI N460GTX Hawk Talon Attack (1GB) video card <---- SLI ---->
    Seasonic SS-660XP2 80 Plus Platinum psu (660w)
    WD Caviar Black WD6401AALS 640GB (data)
    Samsung 840 Pro 256GB SSD (boot)
    SLI @ 16/4 works when running HyperSLI
    Cooler Master 120XL Seidon push/pull AIO cpu water cooling
    Cooler Master HAF XB computer case (RC-902XB-KKN1)
    Asus VH242H 24" monitor [1920x1080]
    MSI N460GTX Hawk (1GB) video card
    Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium
    HT|Omega Claro plus+ sound card
    CyberPower CP1500PFCLCD UPS
    E6300 (R0) @ 3.504GHz [8x438MHz] ~~ P35-DS3L [rev: 1.0] ~ Bios: F9 ~~ 4x2GB Kingston HyperX T1 PC2-8500, 876MHz @4-4-4-10
    Seasonic X650 80+ gold psu (650w) ~~ Xigmatek Balder HDT 1283 cpu cooler ~~ Cooler Master CM 690 case (RC-690-KKN1-GP)
    Samsung 830 128GB SSD MZ-7PC128B/WW (boot) ~~ WD Caviar Black WD6401AALS 640GB (data) ~~ ZM-MFC2 fan controller
    HT|Omega Striker 7.1 sound card ~~ Asus VH242H monitor [1920x1080] ~~ Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium ~~ CyberPower CP1500PFCLCD U.P.S
    .


  6. #6
    blacktruth is offline Junior Member
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    Default Re: Gigabyte G41M-Combo Vcore BIOS setting does not work

    Hello again.

    Thanks for the replies. The CMOS clearing procedure was informative. So here's what I did:

    1) Shut down computer, remove power cable.
    2) Press power button for 15 seconds. (The system tried to "boot" with the remaining charge in the caps, but...)
    3) Shorted the CMOS clear jumpers for 10 minutes, with a jumper. Removed jumper.
    4) Powered on the computer, immediately entered setup.
    5) Loaded Optimized Defaults from the BIOS main page, then Save settings & Exit. System restarts without powering down. (system would only power down on restart if I touched clock/multiplier settings)
    6) Enter BIOS again and change the settings I want. CPU Vcore from 1.150 to 1.250 and set all four options mentioned earlier on Advanced BIOS Features (EIST etc.) to Disabled. Save settings & Exit. System restarts without powering down.
    7) Everything is set. In this state, if I enter BIOS to check Vcore in System Health section, I get a reading of 1.236 (there's an offset from actual value, sensor reports a lower value than actual). If I boot Windows or Linux I get a reading of 1.120. Vcore is obviously set at the default 1.150, not 1.250. The big question is why this is happening.

    The reason I picked 1.250 volts is I wanted a significantly higher voltage so as to verify correct voltage change without having the waters muddied by sensor reading offsets etc, but also stay well within the specs of my processor. I plan to run the processor at about 1.200 V, if I manage to correctly change Vcore that is.

    I have attached three pictures showing system information from my computer after I boot Windows (AIDA64). The last picture shows sensor readings after boot, with the default voltage instead of what I set in BIOS. EasyTune reports the same voltage value as AIDA64.

    Any further help would be much appreciated.







    Last edited by blacktruth; 09-02-2016 at 02:11 AM.

  7. #7
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    Default Re: Gigabyte G41M-Combo Vcore BIOS setting does not work

    Excellent job filling in your full PC Specs and your posted screenshots.

    If you aren't familiar with vdroop and vdrop, do a web search using: vdroop vs vdrop
    Basically vdrop is the slightly lower CPU Vcore voltage that you see in the bios PC Health section and vdroop is the even lower voltage that you see in monitoring programs, especially when your system is heavily loaded. Take a look at my screenshot and compare the ET6 CPU Vcore setting with my HWiNFO values for current, minimum and maximum CPU Vcore, especially in the lower left corner where I also included the voltages while running the very demanding LinX stress test.
    As I recall, it was common to see vdroop = 0.06 or 0.07 volts lower than the CPU Vcore setting in the bios with Gigabyte P35 and P45 motherboards as well as their G-series motherboards. Load line calibration is an option to minimize vdroop on some higher end motherboard models.

    If you are really into why vdroop is your friend, check out Anandtech's Overclocking Intel's New 45nm QX9650: The Rules Have Changed and read both pages in the Intel Processor Power Delivery Guidelines section. This article caused quite a web battle between those who "must have" LLC and those who avoid using LLC. FWIW, I don't like to use LLC, but to each his own. I couldn't find the LLC option in your motherboard user manual.

    I double checked the available bios versions for all three of the G41M-Combo models and the FA and FB bios versions are only for your rev: 2.0 motherboard.

    The only thing that I can think of is to boot with a minimal hardware setup where you use:
    • PS/2 keyboard and PS/2 mouse
    • only one memory module, and possibly try using a single DDR2 module
    • boot drive only, no other hard drives
    • video card
    • cpu and if possible, try a different cpu, even something like my old E2140 super wimpy cpu that went from 1.60GHz to 3.20GHz and was stable.
    • possibly try using a different power supply

    Trying a different psu is a long shot, but I've seen many strange system problems caused by a faulty or failing power supply.

    You might need to closely inspect the cpu socket for one or more bent, broken or burnt pins that might be causing the problem.
    Spotting defective socket pins is extremely difficult if you haven't done it before. If there is any question, take a close up macro photo without using a flash and post a link to one or more high resolution photos. Do a web search using bent cpu pin and look for examples of high quality photos.

    If your cpu vcore is behaving "better" with your minimal hardware setup, then you should reconnect one item at a time and then verify that each newly added item hasn't caused the strange vcore problem.





    If my screenshot is too difficult to read, copy and paste it into IrfanView or a similar image editing program and apply the Negative option to change the image back to its regular colors.
    Last edited by profJim; 09-02-2016 at 10:08 AM. Reason: typo
    Q9650 @ 4.10GHz [9x456MHz]
    P35-DS4 [rev: 2.0] ~ Bios: F14
    4x2GB OCZ Reaper PC2-8500 1094MHz @5-5-5-15
    MSI N460GTX Hawk Talon Attack (1GB) video card <---- SLI ---->
    Seasonic SS-660XP2 80 Plus Platinum psu (660w)
    WD Caviar Black WD6401AALS 640GB (data)
    Samsung 840 Pro 256GB SSD (boot)
    SLI @ 16/4 works when running HyperSLI
    Cooler Master 120XL Seidon push/pull AIO cpu water cooling
    Cooler Master HAF XB computer case (RC-902XB-KKN1)
    Asus VH242H 24" monitor [1920x1080]
    MSI N460GTX Hawk (1GB) video card
    Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium
    HT|Omega Claro plus+ sound card
    CyberPower CP1500PFCLCD UPS
    E6300 (R0) @ 3.504GHz [8x438MHz] ~~ P35-DS3L [rev: 1.0] ~ Bios: F9 ~~ 4x2GB Kingston HyperX T1 PC2-8500, 876MHz @4-4-4-10
    Seasonic X650 80+ gold psu (650w) ~~ Xigmatek Balder HDT 1283 cpu cooler ~~ Cooler Master CM 690 case (RC-690-KKN1-GP)
    Samsung 830 128GB SSD MZ-7PC128B/WW (boot) ~~ WD Caviar Black WD6401AALS 640GB (data) ~~ ZM-MFC2 fan controller
    HT|Omega Striker 7.1 sound card ~~ Asus VH242H monitor [1920x1080] ~~ Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium ~~ CyberPower CP1500PFCLCD U.P.S
    .


  8. #8
    blacktruth is offline Junior Member
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    Default Re: Gigabyte G41M-Combo Vcore BIOS setting does not work

    Hello!

    Thanks for the suggestions. Quite some info there.

    So what I tried is this:

    I removed the motherboard and made a new simple test rig:

    - Different PSU (450W)
    - Single ATA 20GB Seagate drive with Win 7 SP1 64bit. No other hard disk or optical drives.
    - USB keyboard and mouse (I do not have PS/2 versions handy)
    - The same 2x4GB DDR3L memory
    - I used the on board G41 graphics, did not install an external GPU so as to get that factor out of the way.

    About the processor:

    E5200@2.5GHz (Wolfdale - 45nm) is my main CPU. In addition to this, I tried two more CPUs:
    E2200@2.2GHz (Allendale - 65nm)
    E2160@1.8GHz (Allendale - 65nm)

    I did not touch the BIOS settings, the exact same settings were used except for the clock/multiplier.
    (The four settings mentioned earlier were disabled.)

    The results in short is that the E2200 and E2160 successfully change Vcore.
    The results with a Vcore setting of 1.250V are summed up in the following table.
    First column is what PC Health section in BIOS reports.
    Second and third columns is what AIDA64/ET6 reports at idle/load.
    The Vdroop difference becomes apparent from the two last columns.

    1.250 BIOS IDLE LOAD
    E2160 1.236 1.296 1.280
    E2200 1.236 1.232 1.216
    E5200 1.236 1.120 1.104

    Apparently it has something to do with the CPU, motherboard, or combination of board/CPU.

    Having the 65nm CPUs behave better is quite ironic, as the PCB reads "45nm CPU Optimized". :-/

    After these results I tried two more things:

    - The E5200 has the "C2/C2E State Support" BIOS setting available, the Allendale CPUs don't.
    I tried changing from Disabled to Enabled with no luck. Both settings do not help.

    - Memory. I removed the 2x4GB DDR3L memory and installed 2x2GB DDR2 memory.
    It did not help either, the results are the exact same.

    Sadly I do not have another 775 board handy with a Vcore adjustment to see how the E5200 behaves there.

    I am quite baffled by this. Is there anything else I could try? Any suggestions welcome.
    Last edited by blacktruth; 09-02-2016 at 04:47 PM.

  9. #9
    profJim's Avatar
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    Default Re: Gigabyte G41M-Combo Vcore BIOS setting does not work

    The cpu compatibility chart for your motherboard includes both E5200 steppings, M0 and R0 so that is not an issue.

    Carefully inspect the underside of your E5200 cpu to see if there is any dirt or debris that might be causing bad contact with any of the motherboard's cpu socket pins. Is there any excess cpu thermal grease on the E5200's pcb?

    The E5200 has 2MB of L2 cache and I think that all of the E21xx processors only have 1MB of L2 cache. It's possible that there is a problem with some of the motherboard's cpu socket pins but that this defect doesn't affect either of your E2xxx processors. Cpu failures are rare, but it's possible that your E5200 is defective. Without another cpu or motherboard to test with, its hard to know where the problem is.

    Is there a local PC recycle shop near you where you might be able to buy a used cpu or motherboard to test with?
    Do any of your friends have a cpu and/or motherboard that they aren't using?

    If I think of anything else that might help I'll let you know.
    Q9650 @ 4.10GHz [9x456MHz]
    P35-DS4 [rev: 2.0] ~ Bios: F14
    4x2GB OCZ Reaper PC2-8500 1094MHz @5-5-5-15
    MSI N460GTX Hawk Talon Attack (1GB) video card <---- SLI ---->
    Seasonic SS-660XP2 80 Plus Platinum psu (660w)
    WD Caviar Black WD6401AALS 640GB (data)
    Samsung 840 Pro 256GB SSD (boot)
    SLI @ 16/4 works when running HyperSLI
    Cooler Master 120XL Seidon push/pull AIO cpu water cooling
    Cooler Master HAF XB computer case (RC-902XB-KKN1)
    Asus VH242H 24" monitor [1920x1080]
    MSI N460GTX Hawk (1GB) video card
    Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium
    HT|Omega Claro plus+ sound card
    CyberPower CP1500PFCLCD UPS
    E6300 (R0) @ 3.504GHz [8x438MHz] ~~ P35-DS3L [rev: 1.0] ~ Bios: F9 ~~ 4x2GB Kingston HyperX T1 PC2-8500, 876MHz @4-4-4-10
    Seasonic X650 80+ gold psu (650w) ~~ Xigmatek Balder HDT 1283 cpu cooler ~~ Cooler Master CM 690 case (RC-690-KKN1-GP)
    Samsung 830 128GB SSD MZ-7PC128B/WW (boot) ~~ WD Caviar Black WD6401AALS 640GB (data) ~~ ZM-MFC2 fan controller
    HT|Omega Striker 7.1 sound card ~~ Asus VH242H monitor [1920x1080] ~~ Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium ~~ CyberPower CP1500PFCLCD U.P.S
    .


  10. #10
    blacktruth is offline Junior Member
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    Default Re: Gigabyte G41M-Combo Vcore BIOS setting does not work

    Hello again profJim. Again, thanks for taking the time to look around my problem.

    I guess one of the last things to blame would be a socket pin or dirt on the cpu, but I don't think that is the cause.

    I found the following reddit post that you might find interesting:

    https://www.reddit.com/r/overclockin..._mb_questions/

    User "gainsdyslexiafromyou" apparently sets his voltage to 1.4 but when windows boots up it is 1.14 (I am guessing default).

    This is exactly what drives me crazy, that apparently the voltage is properly set in the bios, if you check PC Health Status after setting voltage you can verify it is correctly set. But by the time Windows boots up, Vcore is back at default. When does the Vcore change and why?

    I also wanted to ask you, what do you think is the best route to officially contact Gigabyte about this issue? Perhaps they can verify it is a known problem with certain CPUs on this board so I can stop searching, or even better, provide a solution (long shot).

    Thanks again.

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