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Thread: x48-ds5 probs...




  1. #1
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    Default x48-ds5 probs...

    hi all

    i am new to overclocking and of course have hit my first problem.......

    i have read many forums trying to overcome the problem but have still not succeded so here goes....

    i am trying to overclock my gigabyte x48-ds5 / E8500 core2duo and here are my specs...

    gigabyte x48-ds5 rev.1 F7 bios
    Core2duo E8500 3.16 g
    Vandetta 2 cpu cooler
    EZCool 1050w psu
    2x 1g Buffalo 800 ddr2 (dual channel) 5-5-5-15 pc6400
    2x gigabyte ati hd4870 crossfire

    now, i started in the bios by setting the fsb to 400mhz and bringing down multiplyer to 8 to get 3.4gig, i set the spd to stay at 800mhz which of course in return gave me a 1:1 ratio, i rebooted and got to desktop only to hang 2 mins later so i did a bit of reading and read somewhere to set the cpu skew at 50ps which i tried and still it hangs at desktop, i have checked temps constantly and core temps never go above 50.c
    am i right in saying i need to start playing with voltages ?? this is what worries me and is why i am now asking for help before i end up blowing my cpu sky high, i understand that overclocking is risky but best to ask the experianced and learn from their mistakes eh ...

    can anyone suggest some more bios settings for a newb ? :)

  2. #2
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: x48-ds5 probs...

    You should set manually the DDR2 voltage to the spec on your ram, which is likely 2.1 (+0.3V)

    I can say 8 X 400 FSB is not 3.4, but 3.2

    Other then that please fill this out so I can know what you are trying already. If you need to add something that is not listed please do so >>>>

    This is Just a template I use to ask people there settings, pay no attention to the numbers in it, replace with yours
    Robust Graphics Booster___________ [Auto]
    CPU Clock Ratio ____________ [8]
    CPU Host Clock Control_ [Enabled]
    CPU Host Frequency (MHz)__________ [400]
    PCI Express Frequency (Mhz)_______ [100]
    C.I.A. 2__________________________ [Disabled]
    System Memory Multiplier (SPD)____ [2.00]
    DRAM Timing Selectable_______ SPD __ [Manual]

    Performance Enhance = [Standard]

    CAS Latency Time________________ ?
    Dram RAS# to CAS# Delay_________ ?
    Dram RAS# Precharge Delay_______?
    Precharge Delay (tRAS)__________ ?
    ACT to ACT Delay (tRRD)_________ ?
    Rank Write to READ Delay________ ?
    Write to Precharge Delay_________ ?
    Refresh to ACT Delay______________ ?
    Read to Precharge Delay__________ ?
    Static tRead Value_______________ 1-31
    Static tRead Phase Adjust________ 1-31

    System Voltage Control____ [Manual]
    DDR2 OverVoltage Control__ [+0.300V]
    PCI-E OverVoltage Control_ [+0.1V]
    FSB OverVoltage Control___ [+0.1V]
    (G)MCH OverVoltage Control [+0.1V]
    CPU Voltage Control_______ [1.25]

  3. #3
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    Default Re: x48-ds5 probs...

    ok i think ive sorted it....

    i upped the voltages by 0.1v and the ram voltage to 2.1v i think my ram should only be 1.8v so a little concern there, should i also adjust the skew settings ? ive read somewhere to change them both between 50 - 150 ps ?? does this look ok to you guys ??.....
    Attached Images Attached Images x48-ds5 probs...-1-jpg 

  4. #4
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    Default Re: x48-ds5 probs...

    hi Lsdmeasap , thankyou for your very quick response

    i will fill out the form now and post.............

  5. #5
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: x48-ds5 probs...

    If this is your Model # on your ram FSX800D2C-K2G Then it is 2.1 as shown here>>>
    Newegg.com - BUFFALO Firestix 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory - Desktop Memory

    But best for you to check the model # to be sure where you bought it or on the ram sticker!!!! Or possibly In Everest or PCWizard

    As for the skew, which are you referring to exactly as some boards have a few

  6. #6
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    Default Re: x48-ds5 probs...

    ok, heres what you asked for.....


    Robust Graphics Booster___________ [Auto]
    CPU Clock Ratio ____________ [8.5]
    CPU Host Clock Control_ [Enabled]
    CPU Host Frequency (MHz)__________ [400]
    PCI Express Frequency (Mhz)_______ [100]
    C.I.A. 2__________________________ [Disabled]
    System Memory Multiplier (SPD)____ [2.00]
    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

    System Voltage Control____ [Manual]
    DDR2 OverVoltage Control__ [+0.300V]
    PCI-E OverVoltage Control_ [+0.1V]
    FSB OverVoltage Control___ [+0.1V]
    (G)MCH OverVoltage Control [+0.1V]
    CPU Voltage Control_______ [1.35]

    skew settings:

    cpu/pciex clock driving control [800mv]
    cpu clock skew control [normal]
    (g)mch clock skew control [normal]

    my ram models are as follows: Buffalo M2U800-1GBJ (x2 1024 sticks installed)


    again thankyou for your time

  7. #7
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: x48-ds5 probs...

    I cannot find that Model AT ALL online or at The manufacturers website >>>
    Buffalo Technology - Select Your Region

    Can you find it there, or link me to where you bought it? SO we can be sure about this voltage question

    Ahh I forgot you said 8500 When I looked before, so you was right 8.5 X 400 is 3.4 Silly me!

    I see you are using 1.35 CPU Voltage for 3.4, that is likely way more then enough. I am using 1.32 on my E3110 (8400) for 4+ GHZ. So you can likely bring that down for sure after you get your memory stable

    Robust Graphics Booster___________ [Auto]
    CPU Clock Ratio ____________ [8.5]
    CPU Host Clock Control_ [Enabled]
    CPU Host Frequency (MHz)__________ [400]
    PCI Express Frequency (Mhz)_______ [100]
    C.I.A. 2__________________________ [Disabled]
    System Memory Multiplier (SPD)____ [2.00]
    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)__________ 15/18

    The below settings I will suggest are Ranges, set to highest first. The later move lower ONE AT A TIME testing with memtest86+ after each move.

    ACT to ACT Delay (tRRD)_________ 3-4
    Rank Write to READ Delay________ 9-11
    Write to Precharge Delay_________ 3-5
    Refresh to ACT Delay______________ 38-42
    Read to Precharge Delay__________ 3-5
    Static tRead Value_______________ 7-10
    Static tRead Phase Adjust________ auto << Leave on AUTO or Zero or 1-31

    System Voltage Control____ [Manual]
    DDR2 OverVoltage Control__ [+0.300V]
    PCI-E OverVoltage Control_ [+0.1V]
    FSB OverVoltage Control___ [+0.1V]
    (G)MCH OverVoltage Control [+0.1V - +0.125V]
    CPU Voltage Control_______ [1.35]

    CPU Clock Drive..........................: 800mv
    PCI Express Clock Drive..................: 900mv
    CPU Clock Skew (ps)......................: 150ps
    MCH Clock Skew (ps)......................: 250ps

    Here is a FAQ I found about Skew >>>
    How to: Clock Skew Can Save Your Overclock And Memory - Overclock.net - Overclocking.net

    And here you see a little discussion as well
    Overclocking 45nm CPUs with the Gigabyte EP45-DS3R - [H]ard|Forum

    By the way, have you tested that ram at all with memtest86+? If not you shoudl for sure, in a different board if you can to be sure it did not come to you DOA, it happens

  8. #8
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    Default Re: x48-ds5 probs...

    i have not done mem. tests as of yet, TBH i think its obviously not the best of performers and no i cant find it either ? only this Mix Computerversand GmbH which has answerd the voltage question at least, i have been thinking about buying some new ram and wonderd if you have any good suggestions for my particular setup ??

    i will change some more settings as per your post and will let you know how i get on.

    cheers bud..

  9. #9
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    Default Re: x48-ds5 probs...

    ok , all set, i have however changed CPU Voltage Control from 1.35 to 1.3 and DDR2 OverVoltage Control from 2.1 back to 1.8 and have booted successfully at least.

    ill run a mem test..............

  10. #10
    Lsdmeasap's Avatar
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    Default Re: x48-ds5 probs...

    Well unless you find the exact model you will never know if it should be 2.1 or 1.8 as I see MANY different models by that company both using 1.8 and 2.1

    I would suggest Mushkins or G.Skills. If you cannot find those in your area let me know and I will make some other suggestions

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