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Thread: Memory multiplier problems on EP31 DS3L




  1. #1
    Join Date
    Mar 2009
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    10

    Question Memory multiplier problems on EP31 DS3L

    I'm gradually tweaking this motherboard so that my cheap system works to the best of its capabilities, but I've run in to a funny with the memory multipliers.

    System:
    Gigabyte EP31-DS3L
    Pentium dual core E5200 (2.5GHz)
    4Gb (2*2Gb) OCz Gold PC2-8500
    OCZ Technology | Products | Memory | OCZ DDR2 PC2-8500 Gold Edition 4GB Dual Channel
    Gainward HD4850 Golden Sample

    I've got the processor stable at 3.33GHz, at 12.5*267MHz, 10.5*318MHz, or 10*334MHz, stable meaning Prime95 stable for 24 hours+.
    Currently I have it on the 318MHz fsb with the 3.33 memory multiplier giving 1060MHz memory, timings are 5-6-5-18 - 3-3-3-48-3-4-Auto, which is pretty tight and fast, stable in memtest86 for 6 hours+.

    For 334MHz fsb I need to drop the memory multiplier down to 2.5 making the ram 835MHz.

    If I try to use the 3 memory multiplier on a 334fsb the system fails to boot, no matter how slack I put the memory timings, or leave them on auto. The memory will only be at 1002MHz at this point, so slower than on the 318fsb.

    Any ideas why I can't use the 3 multiplier with an fsb of 334 or above? I'd like this because my next target is 10*350MHz, and this would put the memory at 1050MHz.

    Voltages:
    CPU @ 1.2125 (1.175 default)
    vMEM @ +0.2
    vPCI-E @ +0.1
    vFSB @ +0.1
    gMCH @ +0.2

    I'm wondering if I'm running in to some bootstrap limit, maybe because the 3 memory multiplier is designed for a fsb of 266 it doesn't scale, but the same should be the same for the 2.5 multi too?


    Taz

  2. #2
    profJim's Avatar
    profJim is online now Chief Munchkin + moderator
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    Default Re: Memory multiplier problems on EP31 DS3L

    Your memory is rated at 2.1 volts (2.15 volts EVP), so +0.3 volts might help.

    Grab a copy of a bios template from another thread, fill in your MIT bios settings, and post your current settings here.

    My backup machine uses an e2140 in a P35-DS3L, with 2.2v Ballistix DDR2-800 memory. It is stable at 8x350 MHz with a 3.0 memory multiplier.

    It might be that the EP31 may not overclock as well as the P35 series.
    Q9650 @ 4.10GHz [9x456MHz]
    P35-DS4 [rev: 2.0] ~ Bios: F14
    4x2GB OCZ Reaper PC2-8500 1094MHz @5-5-5-15
    MSI N460GTX Hawk Talon Attack (1GB) video card <---- SLI ---->
    Seasonic SS-660XP2 80 Plus Platinum psu (660w)
    WD Caviar Black WD6401AALS 640GB (data)
    Samsung 840 Pro 256GB SSD (boot)
    SLI @ 16/4 works when running HyperSLI
    Cooler Master 120XL Seidon push/pull AIO cpu water cooling
    Cooler Master HAF XB computer case (RC-902XB-KKN1)
    Asus VH242H 24" monitor [1920x1080]
    MSI N460GTX Hawk (1GB) video card
    Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium
    HT|Omega Claro plus+ sound card
    CyberPower CP1500PFCLCD UPS
    E6300 (R0) @ 3.504GHz [8x438MHz] ~~ P35-DS3L [rev: 1.0] ~ Bios: F9 ~~ 4x2GB Kingston HyperX T1 PC2-8500, 876MHz @4-4-4-10
    Seasonic X650 80+ gold psu (650w) ~~ Xigmatek Balder HDT 1283 cpu cooler ~~ Cooler Master CM 690 case (RC-690-KKN1-GP)
    Samsung 830 128GB SSD MZ-7PC128B/WW (boot) ~~ WD Caviar Black WD6401AALS 640GB (data) ~~ ZM-MFC2 fan controller
    HT|Omega Striker 7.1 sound card ~~ Asus VH242H monitor [1920x1080] ~~ Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium ~~ CyberPower CP1500PFCLCD U.P.S
    .


  3. #3
    Join Date
    Mar 2009
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    Default Re: Memory multiplier problems on EP31 DS3L

    I've tried +0.3v on the RAM now, still no post. I'll make a note of the full bios settings and post them here, it is odd though as all I'm doing is decreasing the memory multiplier, and therefore memory speed.

    Taz

  4. #4
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    Bucharest, Romania
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    Default Re: Memory multiplier problems on EP31 DS3L

    The P*1 series boards never clock as well as their big brothers. I've encountered mobos that have trouble with certain memory ratios, yours seems to do the same.

    Try vFSB +0.2 and MCH +0.3. Leave the FSB at 318 and drop the RAM ratio, see if it still has trouble. If it doesn't, you're lucky. If it crashes a few MHz above that, you've hit the board's limit.

  5. #5
    Join Date
    Mar 2009
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    Default Re: Memory multiplier problems on EP31 DS3L

    Hi,

    Here are my full MIT settings, this is at my current fully stable OC settings:

    ======================================
    Robust Graphics Booster___________ [Auto]
    CPU Clock Ratio ____________ [10]
    Fine Clock Ratio ____________[0.5]
    CPU Host Clock Control_ [Enabled]
    CPU Host Frequency (MHz)__________ [318]
    PCI Express Frequency (Mhz)_______ [100]
    C.I.A. 2__________________________ [Disabled]
    System Memory Multiplier (SPD)____ [3.33]
    DRAM Timing Selectable_______ SPD __ [Manual]

    Performance Enhance = [Standard]

    CAS Latency Time________________ 5
    Dram RAS# to CAS# Delay_________ 6
    Dram RAS# Precharge Delay_______6
    Precharge Delay (tRAS)__________ 18

    ACT to ACT Delay (tRRD)_________ 3
    Rank Write to READ Delay________ 3
    Write to Precharge Delay_________ 6
    Refresh to ACT Delay______________ 48
    Read to Precharge Delay__________ 3
    Static tRead Value_______________4
    Static tRead Phase Adjust________ [Auto]

    System Voltage Control____ [Manual]
    DDR2 OverVoltage Control__ [+0.2V]
    PCI-E OverVoltage Control_ [+0.1V]
    FSB OverVoltage Control___ [+0.1V]
    (G)MCH OverVoltage Control [+0.2V]
    CPU Voltage Control_______ [1.2125]
    ======================================

    This is fully stable, it is only when I try dropping the memory multiplier down from 3.33 to 3 that it completely fails to boot, even if I slacken off all of the memory settings.

    I'll try playing with the vFSB and gMCH to see if that helps, and also maybe play with the FSB to see if that helps, after all I know that 334MHz is also fully stable.

    Taz

  6. #6
    Join Date
    Mar 2009
    Posts
    10

    Default Re: Memory multiplier problems on EP31 DS3L

    I've tried setting vFSB +0.2 and MCH +0.3, it still won't let me use the 3 memory multiplier here.

    Don't forget, the motherboard is fine with a fsb of 334MHz, haven't tried higher yet but will be doing over the next few weeks. The memory multiplier of 3 just gives nicer memory speeds while not pushing the northbridge too far, I am all to well aware that this is an older generation chip and won't give me sky high clocks, but I don't need them. The 12.5 multiplier would take me to 4GHz (not that I think I'll get that far) at a fsb of only 320MHz, and that is below the fully supported fsb of 333MHz.

    Another wierd point, the 3x memory multiplier would normally run on the 266 fsb to give 800 memory, so I would expect it to work in the 266-333 range. The 3.33x memory multiplier I am currently running would normally only run on a 200 fsb to give 667 ram, and yet works fine up at my 318 fsb.

    I may give up on the 3x and try ramping up the fsb, 9.5*351 or 9*371 would leave me at 3.34GHz, and the 2.5 multiplier would get me 877 or 927 respectively, providing it actually works...

    Like I said though the 3x memory multiplier just gives nicer RAM speeds without pushing the fsb too far, so would be more convenient.

    Taz

  7. #7
    Join Date
    May 2009
    Posts
    2

    Default Re: Memory multiplier problems on EP31 DS3L

    Try bringing the FSB down to 240x12.5, memory multiplier 3.00x, timings set as auto and no voltage boost. I understand your FSB is running at 334 but to understand if your system can run at 3.00x memory multiplier we will see.

    ======================================
    Robust Graphics Booster___________ [Auto]
    CPU Clock Ratio ____________ [12]
    Fine Clock Ratio ____________[0.5]
    CPU Host Clock Control_ [Enabled]
    CPU Host Frequency (MHz)__________ [240] --> bring down to 240 for now
    PCI Express Frequency (Mhz)_______ [100]
    C.I.A. 2__________________________ [Disabled]
    System Memory Multiplier (SPD)____ [3.00]
    DRAM Timing Selectable_______ SPD __ [Manual] --> set as Auto

    Performance Enhance = [Standard]

    CAS Latency Time________________ 5
    Dram RAS# to CAS# Delay_________ 6
    Dram RAS# Precharge Delay_______6
    Precharge Delay (tRAS)__________ 18

    ACT to ACT Delay (tRRD)_________ 3
    Rank Write to READ Delay________ 3
    Write to Precharge Delay_________ 6
    Refresh to ACT Delay______________ 48
    Read to Precharge Delay__________ 3
    Static tRead Value_______________4
    Static tRead Phase Adjust________ [Auto]

    System Voltage Control____ [Manual]
    DDR2 OverVoltage Control__ [+0.2V] --> no overvoltage 0.00v
    PCI-E OverVoltage Control_ [+0.1V] --> no overvoltage 0.00v
    FSB OverVoltage Control___ [+0.1V] --> no overvoltage 0.00v
    (G)MCH OverVoltage Control [+0.2V] --> no overvoltage 0.00v
    CPU Voltage Control_______ [1.2125] --> this is fine

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