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Help Overclocking my Q9550...

Discussion in 'Overclocking & Cooling' started by sparkison, Feb 15, 2009.

  1. sparkison New Member

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    Hey all, new to the forum and am trying to get some advice :D

    I have recently upgraded to the q9550 since the price drop and am having a hell of a time trying to overclock it!

    I have my c2d oc'd no problem but, this quad is giving me hell.

    I have had an especially hard time finding someone with the DFI P35 and the Q9550 to give me some advice so maybe if someone here has successfully overclocked the q9xxx on this board and has some setting to try that would be great!! :rockout:

    My problem is that I cannot get more than two cores stable at the same time, trying to get all four has proven to be very difficult. I have gotten to 3400mhz at 3hrs prime stable but, no more than that; after about hour three cores 2 and 3 crash.

    I have adequate colling on the NB and the pwm area, and a watercooling setup dedicated to the CPU so cooling isn't an issue, I have even cranked the volts up to 1.4 and have not seen over 58c under full load in prime if that is any help.

    Any and all advice is much appreciated :respect:

    EDIT: Here's my settings for reference :D

    Here are the settings that I can get 3hrs prime stable, after that cores 2 and 3 fail:

    Code:
    CPU Feature Page
    Thermal Management Control................Disabled
    PPM(EIST) Mode............................Disabled
    Limit CPUID MaxVal........................Disabled
    CIE Function..............................Disabled
    Execute Disable Bit.......................Disabled
    Virtualization Technology.................Disabled
    Core Multi-Processing.....................Enabled
    
    Main BIOS Page
    Exist Setup Shutdown......................Mode 2
    Shutdown after AC loss....................Enabled
    AC Shutdown free..........................Enabled
    Clock VCO Divider.........................Auto
    CPU N/2 Ratio.............................Enabled
    CPU Clock Ratio........................... 8.5x
    CPU Clock.................................400 MHz
    Boot Up Clock.............................Auto
    DRAM Speed................................333/667 (806MHZ)
    PCIE Clock................................100MHz
    
    CPU Spread Spectrum.......................Disabled
    PCIE Spread Spectrum......................Disabled
    
    Voltage Setting Page
    CPU VID Control...........................1.24375V
    CPU VID Special Add.......................Auto
    DRAM Voltage Control......................2.170V
    SB 1.05 Voltage...........................1.070V
    SB Core/CPU PLL Voltage...................1.55V
    NB Core Voltage...........................1.57V
    CPU VTT Voltage...........................1.33V
    VCore Droop Control.......................Enabled
    Clockgen Voltage Control..................3.45V
    GTL+ Buffer Strength......................Strong
    Host Slew Rate............................Weak
    CPU GTL 0/2 REF Volt......................80
    CPU GTL 1/3 REF Volt......................90
    North Bridge GTL REF Volt ................80
    
    DRAM Timing Page
    Enhance Data Transmitting.................Auto
    Enhance Addressing........................Auto
    T2 Dispatch...............................Auto
    Clock Setting Fine Delay..................Listed Below
    
    CAS Latency Time (tCL)....................5
    RAS# to CAS# Delay (tRCD).................5
    RAS# Precharge (tRP)......................5
    Precharge Delay (tRAS)....................15
    All Precharge to Act......................Auto
    REF to ACT Delay (tRFC)...................Auto
    Performance Level.........................Auto
    Read Delay Phase Adjust...................Listed Below
    Write to PRE Delay (tWR)..................Auto
    Rank Write to Read (tWTR).................Auto
    ACT to ACT Delay (tRRD)...................Auto
    Read to Write Delay (tRDWR)...............Auto
    Ranks Write to Write (tWRWR)..............Auto
    Ranks Write to Read (tWRRD)...............Auto
    Read CAS# Precharge (tRTP)................Auto
    ALL PRE to Refresh........................Auto
    
    Read Delay Phase Adjust Page
    Channel 1 Phase 0 Pull-In.................Auto
    Channel 1 Phase 1 Pull-In.................Auto
    Channel 1 Phase 2 Pull-In.................Auto
    Channel 1 Phase 3 Pull-In.................Auto
    Channel 1 Phase 4 Pull-In.................Auto
    
    Channel 2 Phase 0 Pull-In.................Auto
    Channel 2 Phase 1 Pull-In.................Auto
    Channel 2 Phase 2 Pull-In.................Auto
    Channel 2 Phase 3 Pull-In.................Auto
    Channel 2 Phase 4 Pull-In.................Auto
    
    Clock Setting Fine Delay Page
    DLL and RCOMP Settings .................By Menu
    Ch1 DRAM Default Skew.....................Model 0
    Ch2 DRAM Default Skew.....................Model 0
    RCOMP Setting.............................Model 0
    
    Fine Delay Step Degree....................70ps
    
    
    Ch1 Clock Crossing Setting................Auto
    
    Ch2 Clock Crossing Setting................Auto
    
    Ch1Ch2 CommonClock Setting................Auto
    
    Ch1 RDCAS GNT-Chip Delay..................Auto
    Ch1 WRCAS GNT-Chip Delay..................Auto
    Ch1 Command to CS Delay...................Auto
    
    Ch2 RDCAS GNT-Chip Delay..................Auto
    Ch2 WRCAS GNT-Chip Delay..................Auto
    
    Ch2 Command to CS Delay...................Auto
     
    Last edited: Feb 15, 2009
  2. waldis New Member

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    hello!

    do you still need some kind of info? :)

    i've got almost the same system, but not possible to oc more than 419 * 8.5,
    but my voltages are lower

    if you got better results from your config by these days please let me know.
     
  3. Homeless

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    I think your vcore is too low and your nb is too high
     
  4. IINexusII

    IINexusII

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    cpu voltage at 1.35 ish and northbridge at 1.4
     
  5. waldis New Member

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    my VCore at this moment in BIOS: 1.16+++v
    NB -- 1.33v
    VTT -- 1.2v

    here is some of my current settings:
    Code:
    Clock VCO Divider.........................Auto
    CPU N/2 Ratio.............................Enabled
    CPU Clock Ratio........................... 8.5x
    CPU Clock.................................419 MHz
    Boot Up Clock.............................Auto
    CIE Function..............................Enabled
    DRAM Speed................................333/667
    CPU VID Control...........................1.16++++V
    CPU VID Special Add.......................Auto
    NB Core Voltage...........................1.33V
    CPU VTT Voltage...........................1.20V
    VCore Droop Control.......................Disabled
    
    prime95 -- 1.5 hours stable, I know it is too short, but have no results for 24H run

    BIOS -- 09/19/2008

    and can't OC over 419 MHz, even with higher voltages, so running for about 1 year in 24/7 mode with these settings
     
  6. sneekypeet

    sneekypeet Unpaid Babysitter Staff Member

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  7. waldis New Member

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    >> seems your GTL's are out of spec for a DFI.
    if you are talking about my situation, I could only say your version of values are not suitable,
    OCCT reboots the computer in the first minute of working

    GTL parameters should be choosed according to other voltages,
    in my case all GTL values are much lower, about 60,
    and only with them I can get the stable system without need to overvoltage everything
     
  8. sneekypeet

    sneekypeet Unpaid Babysitter Staff Member

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    Was directed at the OP sorry for the confusion.
     
  9. waldis New Member

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    :)

    I'm testing stability now with CPU VID 1.15v, VTT 1.17v, NB 1.3v, CPU Clock 419 (multi 8.5, 3.56 ghz)

    (mobo: dfi lp lt p35-t2r, cpu: q9550 E0)
     
  10. scope54

    scope54

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    your lucky i cant get mine to post past 400, not stable past 390 :(
     
  11. waldis New Member

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    >> i cant get mine to post past 400, not stable past 390
    on the same mobo?

    please post here all of your bios settings completely, like in the first post, maybe I'll can help,
    for the first times i also had big problems with this mobo, all i can say it doesn't like e0 quads too much
     
  12. EnglishLion

    EnglishLion New Member

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    It must a motherboard issue if you're all having similar problems on the same board. I have a Q9550 on an X38 board and can reach 435*8.5 without any problems at all.

    So I would check for an motherboard BIOS updates and look at motherboard related settings. skews and timings and the like.
     
  13. overclocking101

    overclocking101

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    I would buy a new board personally, DFI boards are not for new ocers or the faint at heart that said, what is your PLL set to? Also your VTT looks a bit high, but I am not running a 45nm quad I'm running a Q6600
     
  14. erocker

    erocker Super Moderator Staff Member

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    Not true. They use different terminology in their bios but it's really no different than your Asus board. I've owned both, once you understand what each setting does it's the same.
     

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