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Thread: 16GB problem on GA-P55A-UD7 using all 4 dimms!




  1. #1
    TeslaSpark's Avatar
    TeslaSpark is offline Junior Member
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    Exclamation 16GB problem on GA-P55A-UD7 using all 4 dimms!

    Hi everyone,
    I'm a new TweakTown member as you can see. I'm also a Gigabyte long's timers, PC builder and OC addict.
    I Never had problem with GA board at all. My GA-P55A-UD7 is one of the best board I ever tryed out.

    Now, probem is :

    Last week I bought more RAM, my main rigs passed from 8GB to 16GB. 1 kits to 2 kits of the same series:
    (G.SKILL Ripjaws X F3-17000CL11D-8GBXL 8GB 2X4GB DDR3-2133 CL11-11-11-30 1.5-1.6V Memory Kit)
    The 2 G.Skill kits is exactly the same. Part numbers/modele/timming etc etc etc ...
    I tested boots kits, stand alone on my board, on Dimms 2-4 ... EVERYTHING run OK with RAM @ 2133mhz, X.M.P timing ON, but with fixed timming at 11-11-11-31-41-1T @ 1.62v. (no AUTO)
    MEMTEST86+ tested and passed = ALL THE CHIPS WORKING PERFECTLY!
    P.S. My i7-875K run @ 4.09ghz (178 * 23) @ 1.35v, everything fine.

    This main rigs and config run for more then a year without ANY BSOD.
    So, we can say stability is almos perfect (as perfection does'nt exist down there)

    NOW, When I plugin a 3rd or 4th chips on dimm 1-3, my board dont POST anymore !!
    I got random reboot loop, and/or total freez on POST code : 26, 2b, 50, 75, 87 ... never the same code.
    I can not enter the BIOS at all. Cannot do anything, exect removing some chips.

    When I removed RAM, back to 8GB (2 chips on DIMM 2-4), the Rocksolid stability is right back !

    What I tested so far :
    1- I tried "Load-Optimised" settings, and a LOTS of BIOS/RAM settings.
    2- I mix up all chips from kits, and try every possible sequence.
    3- Unplug all HDD/SSD/DVD and USB, exect main SSD.
    4- Increasing voltage, on QPI / PCH, and others voltages.
    5- I was running on the Beta BIOS (F8b), I roll-back on BIOS version F7.
    6- I tested with a basic video-cards, removed my SLI 470 GTX.

    ANY of all thoses tests changed anything. No POST at ALL when 4 dimms filled up!


    Is there a Gigabyte Pro somewhere, who allready see something like this !??
    Is there a know problem with GA board, with 4 dimms filled / 16GB RAM !??


    THANKS YOU very much.
    Have a good day.

  2. #2
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    Default Re: 16GB problem on GA-P55A-UD7 using all 4 dimms!

    for 16gb running at 2133mhz your gonna need huge amounts of qpi/vtt,how much did you test with? and tried at 1600mhz or 1333mhz speeds?
    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
    TeslaSpark's Avatar
    TeslaSpark is offline Junior Member
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    Default Re: 16GB problem on GA-P55A-UD7 using all 4 dimms!

    @Wazza300 :
    Thanks for the reply !
    Yep, I tested with default setting (1333mhz and 1600mhz) but no change at all.
    Also tested with all AUTO setting, and then RAM was 1333mhz, with stock 133mhz BCK, and default CPU @ 2.9Ghz.

    Here is the highest value tested on my voltage setting :

    16GB problem on GA-P55A-UD7 using all 4 dimms!-capture-png

    Load-line = Level 2
    CPU COre = Normal
    DVID = +0.1250
    QPI/Vtt = 1.260
    PCH = 1.080
    CPU/PLL = 1.820
    DRAM v = 1.620
    DRAM Term. = 0.815
    Ch.A Data = 0.815
    Ch.B Data = 0.815
    Ch.A Add. = 0.815
    Ch.B Add. = 0.815

    How far did you think I can push the QPI/vTT (without any problem) ??

    Thanks.

  4. #4
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    Default Re: 16GB problem on GA-P55A-UD7 using all 4 dimms!

    I'm not sure on p55,could try with 1.35v,and see if 16gb boots
    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
    TeslaSpark's Avatar
    TeslaSpark is offline Junior Member
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    Lightbulb Re: 16GB problem on GA-P55A-UD7 using all 4 dimms!

    Wow, this's fast reply!

    OK, 1.35v on QPI/vTT sounds hight for me, but will try this lather today when back to home.
    Thanks Waza300.


    ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
    EDIT : After some verification, I found this post speaking about QPI/vTT voltage (#1). A very usefull link to Intel Data sheet for i7-875K about vTT absolut Min/Max (#2). The first release of this Data sheet was giving an absolut MAX vTT @ 1.21v, but a new ajusted release of the Data sheet giving MAX vTT @ 1.40v like see on Xeon equivalent CPU (XEON rated from the start to MAX vTT @ 1.40v)

    #1- i5/i7 Lynnfield QPI/VTT voltage - Page 3 - AnandTech Forums
    #2- http://download.intel.com/design/pro...hts/322164.pdf

    (see at P. 65 - Table 7-4. Processor Absolute Minimum and Maximum Ratings)
    16GB problem on GA-P55A-UD7 using all 4 dimms!-capture1-png

    So like it's writed on Intel Data sheet v2, MAX vTT is upto 1.40v !
    I will try this lather.
    C ya.
    Last edited by TeslaSpark; 09-28-2012 at 11:52 PM. Reason: Added infos.

  6. #6
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    Default Re: 16GB problem on GA-P55A-UD7 using all 4 dimms!

    you can also overvolt the dram slightly,even if its rated at 1.6v i think your fine to try with 1.64-1.66v just to see if it helps running 16gb,if not id stick to what your using now
    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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