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Thread: Crash after 4 to 8 GB RAM install




  1. #1
    darthranger is offline Junior Member
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    Default Crash after 4 to 8 GB RAM install

    Hi Folks

    Stupid me... after all these years you'd think I'd know better.

    If it's good... don't 'F' with it.

    No... Had to go and get another two sticks of RAM to fill the last two slots

    = FSX crashed 10 minutes in.

    GA790XT-UD4P (Rev. 1) + original Bios
    G.Skill Ripjaws F3 12800CL9D-DDR3 1600 4 x 2 GB
    Phenom II 955 @3.4
    Win 7 Home Prem. 64 bit

    I didn't anticipate any issues with a 64 Bit OS, but The word on the web seems to be that AMD's don't like 8GB even if you drop down to 1333.

    Any thoughts and/or on how to fill all four slots would be appreciated.

    Rick / Canada

  2. #2
    Acebmxer's Avatar
    Acebmxer is offline Gigabyte Elite
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    Default Re: Crash after 4 to 8 GB RAM install

    With any motherboard intel or amd. There will have to be adjustments made to the bios when added ram. Enter bios write down your full list of bios settings and voltages. and one of the people that are familiar with amd bios can help you get 8gb ram working.
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  3. #3
    Chike is offline Senior Member
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    Default Re: Crash after 4 to 8 GB RAM install

    Quote Originally Posted by darthranger View Post
    GA790XT-UD4P (Rev. 1) + original Bios
    "original" is ambiguous, it depend on the time of manufacture.


    Quote Originally Posted by darthranger
    Phenom II 955 @3.4
    According to the CPU Support List, There are 3 different BIOS vers.(minimum) required depending on the Phenom II X4 955 stepping and TDP.

  4. #4
    darthranger is offline Junior Member
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    Default Re: Crash after 4 to 8 GB RAM install

    Thanks in advance...

    CPU
    AMD Phenom II X4 955

    MOTHERBOARD: MA790XT – UD4P Rev.1 Bios F4

    MEMORY
    G.Skill Ripjaws DDR3-1600 PC3-12800 2048MBx2

    BIOS SETTINGS
    CPU Clock Ratio [x17] 3400Mhz
    CPU Host Clock Control [Manual] 2000Mhz
    CPU Host Frequency [200]
    PCI Clock (Mhz) [Auto]
    HT Link Width [Auto]
    System Memory Clock [Auto]
    Memory Clock X 6.66 1333 Mhz
    DCTS mode [Unganged]

    DDR3 Timing Items (Manual] Spd Auto
    CAS Latency Time [9T] 9T 9T
    DRAM RAS# to CAS# Delay [9T] 9T 9T
    Dram RAS# Precharge Delay [9T] 9T 9T
    ROW Precharge Time [9T] 9T 9T
    Minimum RAS Active Time [24T] 24T 24T
    1T/2T Command Timing [2T]
    TwTr Command Delay [5T] 5T 5T
    Trfco For DIMM 1 [110ns]
    Trfco For DIMM 2 [90ns]
    Trfco For DIMM 3 [110ns]
    Trfco For DIMM 4 [90ns]
    WriteRecovery Time [10T]
    Precharge Time [5T]
    Row Cycle Time [33T]

    System Voltage Control [Auto]
    DDR3 Voltage Control [Auto]
    Northbridge Voltage Control [Auto]
    Southbridge Voltage Control [Auto]
    CPU NBVID Control [Auto]
    CPU Voltage Control [Auto]
    Nprmal CPU VCore 1.3500v

  5. #5
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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  6. #6
    Chike is offline Senior Member
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    Default Re: Crash after 4 to 8 GB RAM install

    I am a bit confused, in the picture on GB site slots 1 & 2 are blue and slots 3 & 4 are white.
    In the manual it says channel 0 is slots 1 & 3, and channel 1 is slots 2 & 4, however the layout for 2 DIMMs dual channel mode is 1 & 2, or 3 & 4. It Also says it is best to have a matched pairs in the same colored slots. A bit of a mess.
    Your settings suggest you have one pair in slots 1 & 3 and the other in slots 2 & 4, is this correct?
    If it is, to make sure the layout is correct please take one pair out and check the Memory tab in CPU-Z to see if they run in dual or single channel mode. If not you should change the layout, verify they do and then add the other pair.

    Next, try to increase CPU NB VID Control gradualy until the memory is stable. Then you may try 1600 again.
    OCZ standard suggestion is 1.35v so you should not need more than that.

  7. #7
    darthranger is offline Junior Member
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    Default Re: Crash after 4 to 8 GB RAM install

    Thanks for the info.

    Got two in Slots 1 + 2 (Blue) as per the manual...

    Didn't notice the confusion with Channel 0 + Channel 1 until you just mentioned it.

    I was thinking Bios and voltage increase... so thanks for confirmation.

    Think I might forego the RAM increase and go for an SSD upgrade to increase FSX performance.

    All forums seem to agree that there isn't any benefit to increase over 4 Gb unless you're doing photo work.

    Thanks !

  8. #8
    Chike is offline Senior Member
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    Default Re: Crash after 4 to 8 GB RAM install

    2 In the blue slots are the original configuration and then you added 2 in the white slots?
    Trfco was the same for 1 & 3, and 2 & 4, that's why I asked.
    Does CPU-Z show the tun in Dual-Channel mode?

  9. #9
    darthranger is offline Junior Member
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    Default Re: Crash after 4 to 8 GB RAM install

    The settings posted are with two in the blue slots (nothing in the white slots) + CPUZ shows dual channel, unganged.

  10. #10
    Chike is offline Senior Member
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    Default Re: Crash after 4 to 8 GB RAM install

    Oh ok that's fine then, so mean the blue slots are 1 & 3 and the white 2 & 4 according to the BIOS.
    You may try the NB VID since you already got the ram unless you are going to trade it for SSD.
    If you wish to try DDR-1600 you also need to set 1.65v DDR3 Voltage.

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