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Thread: 4x1 GB @1200MHz not work at EX38-DQ6




  1. #11
    Join Date
    Feb 2009
    Posts
    7

    Default Re: 4x1 GB @1200MHz not work at EX38-DQ6

    Hello,
    These are my settings while i am using "2x1 GB KHX9600 kingston @1200MHz"
    And i also tyr these settings for 4X1 GB but it does not work..

    MB Intelligent Tweaker (MIT)
    Robust Graphics Booster: Turbo
    CPU Clock Ratio: 9x
    CPU Host Clock Control: Enabled
    CPU Host Frequency(Mhz): 400
    PCI Express Frequency (Mhz): 105
    C.I.A.2: Disabled
    Performance Enhance: Standard
    System Memory Multiplier: Auto
    Memory Frequency(Mhz): 1200
    DRAM Timing Selectable: manual

    Standard Timing Control
    CAS Latency Time:: 5
    DRAM RAS# to CAS#: 5
    DRAM RAS# Precharge: 5
    Precharge Delay(tRAS): 15

    Advanced Timing Control
    ACT to ACT Delay(tRRD): Auto
    Rank Write to READ Delay: Auto
    Write To Precharge Delay: Auto
    Refresh to ACT Delay: Auto
    Read To Precharge Delay: Auto
    tRD : Auto
    tRD Phase Adjustment : Auto
    Command to #CS Timing: 2

    Clock Driving and Skew Control
    CPU/PCIEX Clock Driving Control : 1000
    CPU Clock Skew Control : Normal
    (G)MCH Clock Skew Control : Normal

    System Voltage Control
    DDR2 OverVoltage Control : 0.50
    PCI-E OverVoltage Control : 0.20
    FSB OverVoltage Control : 0.20
    (G)MCH OverVoltage Control : 0.175
    CPU Voltage Control :1.425
    Normal CPU Vcore : 1.275

  2. #12
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
    Join Date
    Jan 2008
    Location
    PCB Island
    Posts
    25,940

    Default Re: 4x1 GB @1200MHz not work at EX38-DQ6

    I think I see a few issues, First off Auto Memory multi is using the 266 strap (3.00) and that may not work at all at 400 FSB. Set that manually to either 3.20 for 1280, or 3.33 for 1333. Your best bet would be 3.20 for 1280, but if you want 1200 exact you are going to need to adjust your FSB to maybe 450 and use 2.66

    And try using 399 or 401 not 400 exact

    So, I would try this >>>

    Robust Graphics Booster: Fast
    CPU Clock Ratio: 9x
    CPU Host Clock Control: Enabled
    CPU Host Frequency(Mhz): 400
    PCI Express Frequency (Mhz): 100
    C.I.A.2: Disabled
    Performance Enhance: Standard
    System Memory Multiplier: See above thoughts, I would for now try 3.20
    Memory Frequency(Mhz): 1280
    DRAM Timing Selectable: manual

    Standard Timing Control
    CAS Latency Time:: 5
    DRAM RAS# to CAS#: 5
    DRAM RAS# Precharge: 5
    Precharge Delay(tRAS): 15-18

    Set all below to highest value first, then later you can lower one at a time
    Advanced Timing Control
    ACT to ACT Delay(tRRD): 3
    Rank Write to READ Delay: 3-6
    Write To Precharge Delay: 4-8
    Refresh to ACT Delay: 54-68
    Read To Precharge Delay:4-8
    tRD : 7-12
    tRD Phase Adjustment : Auto << Always
    Command to #CS Timing: 2

    Clock Driving and Skew Control
    CPU/PCIEX Clock Driving Control : 1000 << I would use 800-900
    CPU Clock Skew Control : Normal
    (G)MCH Clock Skew Control : Normal

    System Voltage Control
    DDR2 OverVoltage Control : 0.50 (2.25-2.35 +0.45-0.55)
    PCI-E OverVoltage Control : 0.20 << +0.1 is likely fine
    FSB OverVoltage Control : 0.20 << +0.15 may be good
    (G)MCH OverVoltage Control : 0.175 << Use .2-.325
    CPU Voltage Control :1.425<< More may be needed, at least until you get going

  3. #13
    Join Date
    Sep 2008
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    990

    Default Re: 4x1 GB @1200MHz not work at EX38-DQ6

    Nothing against you Lsdmeasap, but I'll bet a $1000 that he won't get 4x1GB stable at 1280 with the setup he has on an X38 DQ6. Maybe with watercooling on the NB and pretty extreme MCH voltage, but hat's not an option here really...

    Just for reference, I can't get my 4x1GB Crucial with D9GKX stable on my own X38 DQ6 at DDR2 1200 even, although all sticks can do that when only two DIMMs are installed (of course).

    4 DIMMs is really heavy on the memory controller at DDR2 1000+


  4. #14
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: 4x1 GB @1200MHz not work at EX38-DQ6

    You are right, he should be trying for 1000-1066 as it would be much easier and he could possibly use better timings, advanced ones for sure could be better if the Main ones could not as well.

    He definitely was not going to get anywhere with the MCH Voltage he is using now, tRD auto may also be to low

  5. #15
    Join Date
    Feb 2009
    Posts
    7

    Default Re: 4x1 GB @1200MHz not work at EX38-DQ6

    Hi guys,
    First i want to say that : i don't know why but when i choose AUTO at "System Memory Multiplier:" it set the value to "1200MHz" automatic.
    Now i am at the same sight with Nickel020. I do not think i will make stable 4 dimm at 1200MHz. (althougt i am using a 40mm fan on NB)
    But i am not succeed in to run 3X1 GB at 1200MHz also :) Is it possible to run 3x1 GB at 1200MHz?
    More 1 question; I want to ask you where can i found information about the 5 issue below:
    1-CPU/PCIEX Clock Driving Control :
    2-CPU Clock Skew Control :
    3-(G)MCH Clock Skew Control :
    4-FSB OverVoltage Control :
    5-(G)MCH OverVoltage Control :
    I am not good at these 5 issue.
    Thank you a lot..

  6. #16
    Join Date
    Sep 2008
    Posts
    990

    Default Re: 4x1 GB @1200MHz not work at EX38-DQ6

    The Auto setting making your RAM run at 1200 is because of the X.M.P./EPP profile. The RAM tells the board that it can do 1200 and thus the board runs it that fast by default. Same thing like the SPD basically just for RAM speeds not sanctioned by JEDEC (ever wonder how your board knows whether you have 533, 667 or 800 RAM before? The SPD tells the board).


  7. #17

    Default Re: 4x1 GB @1200MHz not work at EX38-DQ6

    I think its wrong that gigabyte have tested this to work...
    Motherboard: Gigabyte GA-EP45-UD3R
    CPU: E8400 C0
    Memory: Team Xtreem Dark PC2 8500 DDR2 1066MHz CL5 (2*2GB)
    GPU: XFX GTX280
    Sound: Xonar HDAV Deluxe
    HDD's: WD VelociRaptor, WD Blue AAKS, WD Blue 2500BB
    PSU: Corsair HX620
    Case: Sharkoon Rebel12 Value
    CPU Cooler: Xigmatek Achilles S1284C
    Fans: Intake & Extract Top: Sharkoon 140MM 5v mod, Intake Bottom Opposite HDD's: Scythe 120mm Low RPM Drive Bay
    HDD's In 5.25 bay held in 2x Nexus DoubleTwins
    Disc Drives: Blu Ray/HDDVD LG GGCH20L, Pioneer DVR-216DBK
    Monitor: Samsung LE40M86B
    Receiver: Harman Kardon AVR255
    Speaker System: Q Accoustics 5.1i System

    Natalya Simonova: Do you destroy every vehicle you get into?
    James Bond: Standard operating procedure. Boys with toys.
    Goldeneye

  8. #18
    Join Date
    Sep 2008
    Posts
    990

    Default Re: 4x1 GB @1200MHz not work at EX38-DQ6

    No, it's wrong for people to not know that 4 DIMMs won't run as fast as 2.

    If they followed your logic then not 1200MHz RAM would be approved at all, since there is simply no RAM at all that can be guaranteed to run at 1200Mhz when 4 DIMMs are installed. Neither is there a board where you could guarantee that for even one kit.

    1200MHz is overclocking of the northbridge, and not every northbridge is created equal. If you get lucky your board can handle it, but too many boards will not be able to do so.


  9. #19

    Default Re: 4x1 GB @1200MHz not work at EX38-DQ6

    When gigabyte advertise on their website Up to 16GB DDR 1200, you think its wrong for people to think that 1200 x4 dimms is not going to work. Even after double checking on the QVL? I dont think thats right.
    Motherboard: Gigabyte GA-EP45-UD3R
    CPU: E8400 C0
    Memory: Team Xtreem Dark PC2 8500 DDR2 1066MHz CL5 (2*2GB)
    GPU: XFX GTX280
    Sound: Xonar HDAV Deluxe
    HDD's: WD VelociRaptor, WD Blue AAKS, WD Blue 2500BB
    PSU: Corsair HX620
    Case: Sharkoon Rebel12 Value
    CPU Cooler: Xigmatek Achilles S1284C
    Fans: Intake & Extract Top: Sharkoon 140MM 5v mod, Intake Bottom Opposite HDD's: Scythe 120mm Low RPM Drive Bay
    HDD's In 5.25 bay held in 2x Nexus DoubleTwins
    Disc Drives: Blu Ray/HDDVD LG GGCH20L, Pioneer DVR-216DBK
    Monitor: Samsung LE40M86B
    Receiver: Harman Kardon AVR255
    Speaker System: Q Accoustics 5.1i System

    Natalya Simonova: Do you destroy every vehicle you get into?
    James Bond: Standard operating procedure. Boys with toys.
    Goldeneye

  10. #20
    Join Date
    Sep 2008
    Posts
    990

    Default Re: 4x1 GB @1200MHz not work at EX38-DQ6

    Well I have not seen them advertising 16GB at DDR2 1200 and I do not believe they do that, because I don't think there are 4GB DIMMs capapable of DDR2 1200.

    They do advertise that the can do DDR2 1200MHz and more and that the board can run with 16GB but they never imply that it can do both at the same time.


    With what you're saying it's also wrong for car manufacturers to publish the maximum speeds their cars can reach because someone who has his trunk full of baggage and 5 people in his car cannot reach the advertised speed.
    The problem here is that people never assume that the car is as fast when it's fully loaded as when empty but they do imply that the mainboard can do everything under full load (i.e. 4 DIMMs) that it can do when it's not running at a "light load".


    Gigabyte says that the board can run RAM at that speed and it can, just not in every situation. Just like you wouldn't expect your car do reach the same speed uphill as downhill you shouldn't expect your motherboard to work as well in every scenario as it does in the best case scenario.

    Of course it wouldn't be bad idea for GB to write into the QVL list that the OC speeds may not be reached when using 4 DIMMs, but they never say that these speeds can be reached with 4 DIMMs, that is just some people's assumption.
    Last edited by Nickel020; 02-22-2009 at 09:55 PM.


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