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Thread: P55-UD4P Random Reboots




  1. #11
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  2. #12
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    Default Re: P55-UD4P Random Reboots

    Seems to be sorted. Ran stable overnight. I'm sure it's something to do with having turbo enabled with C3/C6/C7 disabled. Under these conditions my processor was still increasing the multiplier to x22, and I'm guessing that it was causing my instability.

    I'm gonna try re-enable C3 and turbo, like Warren suggested, but if it doesn't stay stable I'll just disable them again. Will then try some overclocking. Will post my results.

    Thanks for all the help guys.

  3. #13
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  4. #14
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    Default Re: P55-UD4P Random Reboots

    Enabling both C3/C6/C7 and turbo seemed to work fine. Disabled them for overclocking though. Decided 3.8Ghz was a decent mark to aim for. I started by setting vcore to 1.3v and qpi to 1.35v, set bclk to 181MHz, loosened the memory timings to 9-9-9-24 and then tinkered with a bunch of the settings till I got it stable. Funnily enough, moving the bclk to 182MHz seemed to help. Once I got it stable, I started reducing the voltages. Currently stable with the following settings:


    Advanced Frequency Settings:

    CPU Clock Ratio 21x

    Advanced Core Features [Press Enter]:

    Intel(R) Turbo Boost Tech................[Disabled]
    CPU Cores Enabled........................[All]
    CPU Multi-Threading......................[Enabled]
    CPU Enhanced Halt (C1E)..................[Disabled]
    C3/C6/C7 State Support...................[Disabled]
    CPU Thermal Monitor......................[Enabled]
    CPU EIST Function........................[Disabled]
    Bi-Directional PROCHOT...................[Enabled]

    QPI Clock Ratio..........................[x36]
    QPI Link Speed........................[6.55GHz]
    Uncore Clock Ratio....................[18x]
    Uncore Frequency.........................3276MHz

    >>>>> Standard Clock Control <<<<<

    Base Clock (BCLK) Control................[Enabled]
    BCLK Frequency ..........................[182]
    Extreme Memory Profile (X.M.P.)..........[Disabled]
    System Memory Multiplier (SPD)...........[8.0]
    Memory Frequency (MHz)................1456
    PCI Express Frequency (MHz)..............[100]
    C.I.A.2..................................[Disabled]

    >>>>> Advanced Clock Control <<<<<

    CPU Clock Drive..........................[ 800mV]
    PCI Express Clock Drive..................[ 900mV]
    CPU Clock Skew...........................[ 0ps]

    Advanced Memory Settings:

    Extreme Memory Profile (X.M.P.)..........[Disabled]
    System Memory Multiplier (SPD)...........[8.0]
    Memory Frequency (MHz)................1456
    Performance Enhance (SPD)............. [Standard]
    DRAM Timing Selectable (SPD)............ [Quick]
    Profile DDR Voltage ..................1.5v
    Profile QPI Voltage ..................1.1v

    Channel Interleaving.....................[Auto]
    Rank Interleaving........................[Auto]

    >>>>> Channel A & B

    Channel A Timing Settings [Press Enter]:
    Cas Latency Time........................[9]
    tRCD....................................[9]
    tRP.....................................[9]
    tRAS...................................[24]

    >>>>> Advanced Timing Control

    tRC....................................[Auto]
    tRRD...................................[Auto]
    tWTR...................................[Auto]
    tWR....................................[Auto]
    tWTP...................................[Auto]
    tWL....................................[Auto]
    tRFC...................................[Auto]
    tRTP...................................[Auto]
    tFAW...................................[Auto]
    Command Rate (CMD).................. 1 [2]

    >>>>> Misc Timing Control

    B2B Cas Delay..........................[Auto]
    Round Trip Latency.....................[Auto]

    Channel A Turnaround Settings [Press Enter]:
    Different DIMMs........................[Auto]
    Different DIMMs........................[Auto]
    On The Same Rank.......................[Auto]

    >>>>> Channel A Writes Followed By Writes

    Different DIMMs........................[Auto]
    Different DIMMs........................[Auto]
    On The Same Rank.......................[Auto]


    Advanced Voltage Settings:

    ******Mother Board Voltage Control ******
    Voltage Types............Normal......Current
    --------------------------------------------

    >>> CPU
    Load Line Calibration...................[Enabled]
    CPU Vcore..................1.19375v..[1.22500v]
    QPI/VTT Voltage..........1.100v.....[1.350v]

    >>> MCH/ICH
    PCH Core....................1.050v.....[1.050v]
    CPU PLL......................1.800v.....[1.800v]

    >>> DRAM
    DRAM Voltage..............1.500v.....[1.660v]
    DRAM Termination.........0.750v.....[Auto]
    Ch-A Data VRef............0.750v.....[Auto]
    Ch-A Data VRef............0.750v.....[Auto]
    Ch-B Data VRef............0.750v.....[Auto]
    Ch-B Data VRef............0.750v.....[Auto]


    Miscellaneous Settings:[/SIZE]

    Isochronous Support....................[Enabled]
    Virtualisation technology..............[Enabled]
    USB Storage Detect ....................[Disabled]

    Everything seems to be completely stable. Memtest 4 passes no errors, prime95 2 hours no errors, 3DMark06 22746. All in all quite pleased with the outcome.

    Anyway, thanks again guys.

  5. #15
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    Default Re: P55-UD4P Random Reboots

    Looks good!

    To ensure 100% stability you should test longer with Prime95 and or other tools as well, but I am sure you know that.

    Good luck with further testing, and if you need help feel free to let us know.

    Command Rate 2? Would 1 not work?

  6. #16
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    Default Re: P55-UD4P Random Reboots

    Well, ran prime95 overnight, and all was fine. Got back from work about an hour ago, turned on my PC, and it rebooted itself after bout 5 mins... Struggling to get it stable again. Memory timings are already pretty loose, so don't think its that. Upped the CPU voltage to 1.25v, and reduced the bclk to 166MHz, but neither of those worked. Any other ideas?

  7. #17
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    Default Re: P55-UD4P Random Reboots

    Made the following changes to the voltages:

    >>> CPU
    Load Line Calibration...................[Enabled]
    CPU Vcore..................1.19375v..[1.25000v] from 1.22500v
    QPI/VTT Voltage..........1.100v.....[1.250v] from 1.350v

    >>> MCH/ICH
    PCH Core....................1.050v.....[1.120v] from 1.050v
    CPU PLL......................1.800v.....[1.800v]

    >>> DRAM
    DRAM Voltage..............1.500v.....[1.660v]
    DRAM Termination.........0.750v.....[Auto]
    Ch-A Data VRef............0.750v.....[Auto]
    Ch-A Data VRef............0.750v.....[Auto]
    Ch-B Data VRef............0.750v.....[Auto]
    Ch-B Data VRef............0.750v.....[Auto]

    And set the bclk back to 182MHz. Seems to have stopped the reboots for the mean time. Currently testing with prime95. Will leave it overnight, and report back.

  8. #18
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    Default Re: P55-UD4P Random Reboots

    keep cpu v the same,but if its blue screens again try with 1.30000 qpi/vtt
    Gigabyte z77x UP4-TH F11c Modded Bios
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    http://i38.tinypic.com/14myvfa.jpg x58 ud5 <=3.8ghz + 4.2ghz Overclock Template!!
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  9. #19
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    Default Re: P55-UD4P Random Reboots

    Random reboot is a non-technical term referring to an unintended (and often undesired) reboot for which the cause is not immediately evident to the user. Such reboots may occur due to a multitude of software and hardware problems, such as triple faults.

    As Windows XP/Vista has an option to skip its Blue Screen of Death(BSOD) (Blue Screens of Death in Windows XP/Vista offer no option of pressing any key and seeing if the computer continues functioning) and immediately restarts the computer in the event of a fatal error, users can be mistaken in thinking a Windows XP/Vista computer suffers from random rebooting.

  10. #20
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