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Thread: G.Skill F3-12800CL7-4GBRH and P55M-UD4: Intermittent Memory problems




  1. #1
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    Default G.Skill F3-12800CL7-4GBRH and P55M-UD4: Intermittent Memory problems

    I have some issues with my memory from the very start and I'll try sum up the problems as concise as possible. Firstly, here are my specs:

    CPU: i7-860 (running stock)
    Motherboard: GA-P55M-UD4
    Motherboard BIOS: F5
    Memory: F3-12800CL7-4GBRH x 2 (8GB in total)
    GPU: 7900GT
    OS: Windows 7 64bit

    My problems started with random shutdowns. At that stage I tested everything and narrowed it down to the motherboard, which I sent off and got replaced. before it was sent off, I tested all 4 sticks and found thousands of errors. I also test the memory one stick at a time and didn't manage to find any errors with memtest. So i assumed it wasn't memory related.

    With the new motherboard, the random shutdowns stopped, which I was pretty happy with. However, I left my computer run overnight and woke up to a BSOD (Memory Management). I ran memtest with all 4 sticks again and found thousands again! Not wanting to pull my comp apart again, I used the settings i found here and ran memtest again. Initially, it was fine. After a couple of hours it can up with a low amount of errors like ~4.

    Windows7 is running fine in this state but I can't overlook those errors that memtest has detected. Do I need to do some further tweaking? I prefer not to take the sticks out but I will if I must. I hope I've given enough info. I have some screenshots of my settings if required.

    Thanks in advance.

  2. #2
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    Default Re: G.Skill F3-12800CL7-4GBRH and P55M-UD4: Intermittent Memory problems

    its usually ram timings,voltage and qpi voltage that cause ram bsod's tell me what voltages and ram/speed/timings your using
    Gigabyte z77x UP4-TH F11c Modded Bios
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  3. #3
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    Default Re: G.Skill F3-12800CL7-4GBRH and P55M-UD4: Intermittent Memory problems

    At first I was running them at 1333Mhz with everything set to AUTO (i think it was 9-9-9-24?)

    Now I'm running them at 1600Mhz @ 1.64V at 7-7-7-24, which is what the ram is rated at (well ram is rated at 1.65V but I can only select 1.64V on my board)

  4. #4
    Lsdmeasap's Avatar
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    Default Re: G.Skill F3-12800CL7-4GBRH and P55M-UD4: Intermittent Memory problems

    Auto was the issue likely, especially when you were using 8GB.

    You should use 1.66 instead of 1.64, because 1.64 is likely 1.62-1.63 actual. You may need a bit more PCH voltage, and you may need to try Standard Performance Enhance, also try Turbo/Extreme as some have reported Standard to cause issues.

    Please grab a template from my signature if you think you need help and give us your full settings.

  5. #5
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    Default Re: G.Skill F3-12800CL7-4GBRH and P55M-UD4: Intermittent Memory problems

    Thanks for helping out..
    I've just changed it to 1.66V

    Here are the rest of my settings:


    Advanced Frequency Settings:

    CPU Clock Ratio 21x

    Advanced Core Features [Press Enter]:

    Intel(R) Turbo Boost Tech................[Disabled]
    CPU Cores Enabled........................[All]
    CPU Multi-Threading......................[Enabled]
    CPU Enhanced Halt (C1E)..................[Auto]
    C3/C6/C7 State Support...................[Auto]
    CPU Thermal Monitor......................[Auto]
    CPU EIST Function........................[Disabled]
    Bi-Directional PROCHOT...................[Auto]

    QPI Clock Ratio..........................[Auto]
    QPI Link Speed........................[4.86Ghz]
    Uncore Clock Ratio....................[18x]
    Uncore Frequency.........................2400MHz

    >>>>> Standard Clock Control <<<<<

    Base Clock (BCLK) Control................[Enabled]
    BCLK Frequency ..........................[133]
    Extreme Memory Profile (X.M.P.)..........[Disabled]
    System Memory Multiplier (SPD)...........[12.0]
    Memory Frequency (MHz)................1600
    PCI Express Frequency (MHz)..............[100]
    C.I.A.2..................................[Disabled]

    >>>>> Advanced Clock Control <<<<<

    CPU Clock Drive..........................[ 800mV]
    PCI Express Clock Drive..................[ 900mV]
    CPU Clock Skew...........................[ 0ps]

    Advanced Memory Settings:

    Extreme Memory Profile (X.M.P.)..........[Disabled]
    System Memory Multiplier (SPD)...........[12.0]
    Memory Frequency (MHz)................1600
    Performance Enhance (SPD)............. [Standard]
    DRAM Timing Selectable (SPD)............ [Expert]
    Profile DDR Voltage ..................
    Profile QPI Voltage ..................

    Channel Interleaving.....................[Auto]
    Rank Interleaving........................[Auto]

    >>>>> Channel A & B

    Channel A Timing Settings [Press Enter]:
    Cas Latency Time........................[7]
    tRCD....................................[7]
    tRP.....................................[7]
    tRAS...................................[24]

    >>>>> Advanced Timing Control

    tRC....................................[Auto]
    tRRD...................................[Auto]
    tWTR...................................[Auto]
    tWR....................................[Auto]
    tWTP...................................[Auto]
    tWL....................................[Auto]
    tRFC...................................[Auto]
    tRTP...................................[Auto]
    tFAW...................................[Auto]
    Command Rate (CMD).................. 1 [2]

    >>>>> Misc Timing Control

    B2B Cas Delay..........................[Auto]
    Round Trip Latency.....................[Auto]

    Channel A Turnaround Settings [Press Enter]:
    Different DIMMs........................[Auto]
    Different DIMMs........................[Auto]
    On The Same Rank.......................[Auto]

    >>>>> Channel A Writes Followed By Writes

    Different DIMMs........................[Auto]
    Different DIMMs........................[Auto]
    On The Same Rank.......................[Auto]


    Advanced Voltage Settings:

    ******Mother Board Voltage Control ******
    Voltage Types............Normal......Current
    --------------------------------------------

    >>> CPU
    Load Line Calibration...................[Auto]
    CPU Vcore..................1.19375v..[Auto]
    QPI/VTT Voltage..........1.100v.....[Auto]

    >>> MCH/ICH
    PCH Core....................1.050v.....[Auto]
    CPU PLL......................1.800v.....[Auto]

    >>> DRAM
    DRAM Voltage..............1.500v.....[1.660v]
    DRAM Termination.........0.750v.....[Auto]
    Ch-A Data VRef............0.750v.....[Auto]
    Ch-A Data VRef............0.750v.....[Auto]
    Ch-B Data VRef............0.750v.....[Auto]
    Ch-B Data VRef............0.750v.....[Auto]


    Miscellaneous Settings:[/SIZE]

    Isochronous Support....................[Enabled]
    Virtualisation technology..............[Disabled]
    USB Storage Function? .................[Enabled]</pre>
    Are you also suggesting that i change Performace Enhance (SPD) to Turbo? What does that do exactly?

    Thanks again

  6. #6
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    Default Re: G.Skill F3-12800CL7-4GBRH and P55M-UD4: Intermittent Memory problems

    Yes, normally in older boards Performance Enhance Default of Turbo caused issues, so the normal suggestion was to start with this on standard. Now with P55 I have seen a few reports already that standard caused issues and turbo did not, so do try turbo out and extreme if you like. All this does is increase memory performance via hidden timings.

    Try these changes, Auto QPI/Vtt is likely your issue

    CPU Vcore..................1.19375v..[Auto]
    QPI/VTT Voltage..........1.100v.....[Auto] << Try 1.2-1.35

    >>> MCH/ICH
    PCH Core....................1.050v.....[Auto] << may need 1.1-1.15 but do try QPI/Vtt first
    CPU PLL......................1.800v.....[Auto]

    >>> DRAM
    DRAM Voltage..............1.500v.....[1.660v]

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    Default Re: G.Skill F3-12800CL7-4GBRH and P55M-UD4: Intermittent Memory problems

    Sweet. Thanks mate.

    I've upped he DRAM to 1.66v and put it on Turbo.
    Running memtest now, we'll see how it goes.

    If it still has errors I'll try QPI/VTT and let you know how it goes.


  8. #8
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    Default Re: G.Skill F3-12800CL7-4GBRH and P55M-UD4: Intermittent Memory problems

    Good luck, you will likely for sure need to set your own QPI/Vtt

  9. #9
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    Default Re: G.Skill F3-12800CL7-4GBRH and P55M-UD4: Intermittent Memory problems

    Yea still came up with an error.
    Just applied QPI/VTT at 1.21 and running memtest..

    Really appreciate the help. Didn't get any help over at the G.Skill forum

  10. #10
    flyfisher is offline Member
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    Default Re: G.Skill F3-12800CL7-4GBRH and P55M-UD4: Intermittent Memory problems

    That memory has an XMP profile, I would load that and try it. It sets the subtimings differently on Auto than if you set them on Auto without using the profile. It can make a big difference.

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