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Thread: gigabyte H67N-USB3-B3 undervoltage problem




  1. #1
    Join Date
    Apr 2011
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    US
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    Default gigabyte H67N-USB3-B3 undervoltage problem

    I tried to undervoltage using the H67N-USB3-B3. For example, with auto, vid is 1.25V, I set it to 1.1V. under full load, cpu voltage reads 1.1V. However, with no load, when speedstep kicks in, cpu voltage is 1.15V, normally it should be 0.75V. Does under/over voltage override speepstep?

  2. #2
    Join Date
    Aug 2009
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    Default Re: gigabyte H67N-USB3-B3 undervoltage problem

    The problem is cpu only underclocks when voltage is set to auto or normal,if its a fixed amount then cpu won't downclock on idle however there's another way by using dvid,first set cpu voltage to normal in cpu voltage list and make a note of what voltage cpu uses then find out your max cpu stable voltage and subtract max stable from normal voltage for example setting normal gives you 1.25v and your 100% stable with 1.15v then look for dvid in bios and enter -0.10000v,keep cpu voltage on normal setting,now when under load it will only use 1.15v instead of 1.25v and will still throttle down at idle

    Sorry if it sounds abit complicated but post back if you need more help
    Gigabyte z77x UP4-TH F11c Modded Bios
    Intel i7 3770k 24/7@4.8ghz 1.38v Turbo llc +0.165v dvid multithreading enabled
    Samsung Green(MV-3V4G3D/US) 8GB @2133mhz 9-10-10-21-1t 1.55v
    Thermalright Silver Arrow Cpu Cooler
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    Powercolor 7970 3gb V3 @1150mhz core/1700mhz mem,1.150v Accelero aftermarket air cooler 55c max
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  3. #3
    Join Date
    Apr 2011
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    US
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    Default Re: gigabyte H67N-USB3-B3 undervoltage problem

    Thanks a lot. This is very helpful. I'll try it out. One thing is that when I set the vcore manually/fixed, I did see that the cpu still downclocked. And the voltage from cpu-z was not actually fixed. It jumped around the fixed voltage, sometimes quite a bit.

  4. #4
    Join Date
    Aug 2009
    Location
    Birmingham,Great Britain
    Posts
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    Default Re: gigabyte H67N-USB3-B3 undervoltage problem

    It could be vdroop,where voltage drops slightly under load,either add slightly more voltage to compensate or enable loadline calibration,if its stable though I wouldn't worry as its normal for voltages to fluctuate slightly depending on load
    Gigabyte z77x UP4-TH F11c Modded Bios
    Intel i7 3770k 24/7@4.8ghz 1.38v Turbo llc +0.165v dvid multithreading enabled
    Samsung Green(MV-3V4G3D/US) 8GB @2133mhz 9-10-10-21-1t 1.55v
    Thermalright Silver Arrow Cpu Cooler
    1xSamsung 840 pro 256 Gb SSD windows 8.1 pro 64bit
    1xSamsung f4 HD204UI 2tb hard drive Storage
    Powercolor 7970 3gb V3 @1150mhz core/1700mhz mem,1.150v Accelero aftermarket air cooler 55c max
    Razer Lycosa Keyboard
    Logitech X-530 5.1 Speakers
    Lite-On iHAS124-19 24x Sata DVDRW
    K-World Hybrid DVB-T 210SE Digital T.V Card
    L.G E2260V L.E.D 1920x1080 Monitor
    Xfx Pro 750w silver rated Psu 80+
    Fractal Arc Midi Case

    http://i38.tinypic.com/14myvfa.jpg x58 ud5 <=3.8ghz + 4.2ghz Overclock Template!!
    http://www.youtube.com/user/warren304#p/u Visit Me On Youtube

    Lots Of Gaming Videos With X58 Ud5 System And Gpu On My Youtube Channel!!
    Just Uploaded New Battlefield 4 Video!!!!!!!!!!!!!!!!!!!!!!

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