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Thread: HELP on overclock GIGABYTE-X48 DS5 to 3.4ghz (8.5 x 400FSB)




  1. #21
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: HELP on overclock GIGABYTE-X48 DS5 to 3.4ghz (8.5 x 400FSB)

    What? HAHA

    Look again, this is what I see, which I cannot tell from this what you are using for Ram or MCH >>>

    DDR2 OverVoltage Control__ << This is your ram Voltage (Default is 1.8v) So +0.1V = 1.9V

    (G)MCH OverVoltage Control This is your Northbridge, 2x2GB ram needs some added usually +0.1V, 0.125V, 0.15V, or 0.2V. I would say start at .15 and then try lower later
    i set it 0.15
    From what you said just now, then ram voltage sounds good, MCH may need more though, have you passed memtest86+?

  2. #22
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    Default Re: HELP on overclock GIGABYTE-X48 DS5 to 3.4ghz (8.5 x 400FSB)

    ram voltage is 0.1v, so its 1.9v....
    eh?i set 0.15,MCH voltage need to increase more? what is the impact? more heat on NorthBridge? how i try to increase it later =)

  3. #23
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    Default Re: HELP on overclock GIGABYTE-X48 DS5 to 3.4ghz (8.5 x 400FSB)

    MCH will need at least 1.3V so +0.2 for 2x2GB. You may be able to later bring it down to 1.2-1.25 but but you will have to test that. Is your ram stable with .15?

    The impact is if you do not add it your ram will not be stable. If your NB is too hot you can redo the thermal paste under it or buy a aftermarket cooler such as the ThermalTake Extreme Spirit II for it

  4. #24
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    Default Re: HELP on overclock GIGABYTE-X48 DS5 to 3.4ghz (8.5 x 400FSB)

    yes.my ram is 100% stable with 1.9v (1.8v can goes to 1167)
    hope i increase the MCH will more stable when i run the test.
    think my CPU got no prob with 400fsb x8.5 1.25v right?the main reason to cause the hang when doing stress test is the ram perhaps? hmm

  5. #25
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    Default Re: HELP on overclock GIGABYTE-X48 DS5 to 3.4ghz (8.5 x 400FSB)

    I Meant memtest stable

    What test is hanging? 1.25V may be ok to use for your CPU, maybe not enough. It depends on what it hanging on you

  6. #26
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    Default Re: HELP on overclock GIGABYTE-X48 DS5 to 3.4ghz (8.5 x 400FSB)

    im not sure..i successfully went into windows, but when i run prime95 for stress test..within 1 min my screen hang, and then a bluescreen pop out, that is wat i got~
    i remember i set the vcore to 1.275 somemore....maybe is the ram problem?or the MCH v
    i never tried memtest yet..i always use prime95 >_<

  7. #27
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    Default Re: HELP on overclock GIGABYTE-X48 DS5 to 3.4ghz (8.5 x 400FSB)

    You MUST run memtest86+ way before using Prime95 or Orthos to test. If you are not sure your ram is stable with memtest86+ then you will never know why Prime95 is failing

    One minute fail is pretty fast, sounds like you do need more CPU Vcore probably. But still you also NEED to run memtest86+ on your ram to be sure the timings you are using are not also failing

  8. #28
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    Default Re: HELP on overclock GIGABYTE-X48 DS5 to 3.4ghz (8.5 x 400FSB)

    ya...no road. still fail.donno wher goes wrong...hmm..think is the ram setting

  9. #29
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    Default Re: HELP on overclock GIGABYTE-X48 DS5 to 3.4ghz (8.5 x 400FSB)

    What settings are you trying now that is failing? Please post the full table of settings again that fail for you

    And with those, how high have you tried CPU Core voltage up to?

  10. #30
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    Default Re: HELP on overclock GIGABYTE-X48 DS5 to 3.4ghz (8.5 x 400FSB)

    Hi LSD, its me again. Has been bz working. now only got time to OC my pc..hhee
    anyway..im still stucked i cant OC to 3.4ghz. This is my setting

    Robust Graphics Booster___________ [Auto]
    CPU Clock Ratio ____________ [8]
    Fine Clock Ratio ____________[0.5]
    CPU Host Clock Control_ [Enabled]
    CPU Host Frequency (MHz)__________ [400]
    PCI Express Frequency (Mhz)_______ [100]
    C.I.A. 2__________________________ [Disabled]
    System Memory Multiplier (SPD)____ [2.66D ] = 1066Mhz ram speed
    DRAM Timing Selectable_______ SPD __ [Manual]

    Performance Enhance = [Standard]

    CAS Latency Time________________5
    Dram RAS# to CAS# Delay_________5
    Dram RAS# Precharge Delay_______5
    Precharge Delay (tRAS)__________ 15

    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
    Static tRead Value_______________AUTO
    Static tRead Phase Adjust________ AUTO

    CPU/PCIEX Clock Driving Control [800mV]
    CPU Clock Skew Control [normal]
    GMCH Clock Skew Control [Normal]

    System Voltage Control____ [Manual]
    DDR2 OverVoltage Control__ [+0.1V] = 1.9V For Stability (I Using G.Skill 1100 2x2gb RAM, 1.8V will be enough?)
    PCI-E OverVoltage Control_ [+0.1V] << For stability
    FSB OverVoltage Control___ [+0.1V] << For stability
    (G)MCH OverVoltage Control [+0.1V]
    CPU Voltage Control_______ [1.25]

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