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Thread: 990XA-UD3 Huge (0.08V) Voltage Boost during load.




  1. #1
    Join Date
    Jul 2010
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    Default 990XA-UD3 Huge (0.08V) Voltage Boost during load.

    Hello

    I'm having issues with rather new 990XA-UD3. Motherboard by itself increases voltage when I utilize cores.
    It is set @ bios : 1.45V and during load testing only two cores voltage bumps to 1.472 V it is not huge increase.

    I have done some research about this:
    I used Linpack to test vboos on 990XA-UD3.
    Forcing setting affinity to use one core gives me 1.456 cores.
    Forcing to use two cores gives me 1.472V on cores.
    Forcing to use three cores gives me 1.488V on cores.
    Using 4 cores gives me 1.504 V on cores.
    Using 5 cores gives me 1.520 V on cores.
    Using 6 cores gives me 1.536 V on cores.

    So board during load increases voltage by 0.016V if it detects more current is drawn from the Power Section per core.

    It is strange and I get from idle to full load differience of 0,08V that is HUGE voltage increase and IMO it should not happen. And now i would like to get some answers why that happens, and how this could be fixed.

    Such thing never happened on my last board which was 790XT-USB3.

    I do not suffer from vdrop, but such vboost negatively affects on PC's health during load - and be sincere - PC's are designed to be fully loaded ;) Such vboost increases power consumption and temperatures, and makes difficult to overclock.

    Any help?

  2. #2
    Join Date
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    Default Re: 990XA-UD3 Huge (0.08V) Voltage Boost during load.

    Using loadline calibration? Tried setting a lower level?
    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!!!!!!!!!!!!!!!!!!!!!!

  3. #3
    Join Date
    Jul 2010
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    Default Re: 990XA-UD3 Huge (0.08V) Voltage Boost during load.

    This motherboard does not have any settings for LLC - or I did not know where to find it. (hiting ctrl+f1 gives only few more option's)

    That first option is more propable because I use PC's as enthusiast since 1994.

  4. #4
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    Default Re: 990XA-UD3 Huge (0.08V) Voltage Boost during load.

    could be because its amd,but still would have thought llc would be available,what about voltage offset? if you set to -0.016v or -0.08v then it will take off that amount of voltage at 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!!!!!!!!!!!!!!!!!!!!!!

  5. #5
    Join Date
    Jul 2010
    Location
    Warsaw
    Posts
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    Default Re: 990XA-UD3 Huge (0.08V) Voltage Boost during load.

    Well yes, but voltage will be also reduced one one core.

    So ensuring stability on one or two used cores would be impossible. (basic activity)

  6. #6
    Join Date
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    Default Re: 990XA-UD3 Huge (0.08V) Voltage Boost during load.

    i thought it reduced it across all cores? it does on my mb,doesnt matter how many cores are being used to perform a task it will reduce total cpu load voltage or should do,i dont know if enabling cpu spread spectrum would have anything to do with it?
    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!!!!!!!!!!!!!!!!!!!!!!

  7. #7
    Join Date
    Jul 2010
    Location
    Warsaw
    Posts
    5

    Default Re: 990XA-UD3 Huge (0.08V) Voltage Boost during load.

    Spread spectrum was not tested - I do not think that it should work.

    Well exactly reducing voltage in BIOS works as usual - voltage is reduced on all cores. But using for one core instable - to low voltage sets higher voltage for few more cores.

    SS/enabling/disabling changes nothing. (it should not work anyway)
    Last edited by MRxTheta; 12-08-2011 at 06:53 AM. Reason: add

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