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Thread: CPU Voltage spike during OCCT test




  1. #1
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    Default CPU Voltage spike during OCCT test

    I noticed it went up to 3.6 volts momentarily... Is that serious?
    Thanks
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  2. #2
    kick's Avatar
    kick is offline Senior Member
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    Default Re: CPU Voltage spike during OCCT test

    Well id sure call that a voltage spike. if the reading is accurate and it was like 1.8 v+ more than momentarily.
    Voltage spikes ,at least in relation to occt are supposed to be lessened by tweaking mch v.
    They usually only show in the 3v and 4 volt graphs tho.
    Was llc enabled btw>?.
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  3. #3
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    Default Re: CPU Voltage spike during OCCT test

    Here are my settings:
    MB Intelligent Tweaker(M.I.T.)
    Robust Graphics Booster ...............: fast
    CPU Clock Ratio ..........................:8x
    Fine CPU Clock Ratio.....................:.0.5
    CPU Frequency ...........................:3.61GHz (425x8.5)


    Clock Chip Control
    Standard Clock Control
    CPU Host Clock Control..................: [enabled]
    CPU Host Frequency (Mhz) ............: 425
    PCI Express Frequency (Mhz) .........:100
    C.I.A.2 .................................:[Disabled]


    Advanced Clock Control [Press Enter]
    CPU Clock Drive...........................: <<< 800
    PCI Express Clock Drive.................: <<< 900
    CPU Clock Skew (ps)....................: <<<
    MCH Clock Skew (ps)...................: <<<


    DRAM Performance Control
    Performance Enhance...................: [standard]
    Extreme Memory Profile (X.M.P.).....: [disabled]
    (G)MCH Frequency Latch...............: [Auto]
    System Memory Multiplier ..............:2.40b
    Memory Frequency (Mhz) ..............: 1066 1020
    DRAM Timing Selectable ................: [manual]

    Standard Timing Control
    CAS Latency Time........................5 [5]
    tRCD .........................................7 [5]
    tRP'...........................................7 [5]
    tRAS..........................................20 [12]



    Advanced Timing Control
    tRRD...........................................4 [auto]
    tWTR..........................................4 [auto]
    tWR............................................8 [5]
    tRFC...........................................68 [57]
    tRTP...........................................4 [auto]
    Command Rate (CMD) ....................:0 [2]

    Driving Strength Profiles
    Driving Strength ............................1066

    Channel A
    Static tRead Value.........................:8 [auto]
    tRD Phase0 Adjustment...................:0 [Auto]
    tRD Phase1 Adjustment...................:0 [Auto]
    tRD Phase2 Adjustment .................:0 [Auto]
    tRD Phase3 Adjustment..................:0 [Auto]
    Trd2rd(Different Rank)....................:8 [Auto]
    Twr2wr(Different Rank)...................:8 [Auto]
    Twr2rd(Different Rank)...................:7 [Auto]
    Trd2wr(Same/Diff Rank)..................:9 [Auto]
    Dimm1 Clock Skew Control...............:[Auto]
    Dimm2 Clock Skew Control...............:[Auto]
    DDR Write Training......................:[Auto]

    Channel B
    Static tRead Value.........................:8 [auto]
    tRD Phase0 Adjustment...................:1 [Auto]
    tRD Phase1 Adjustment...................:0 [Auto]
    tRD Phase2 Adjustment .................:0 [Auto]
    tRD Phase3 Adjustment..................:0 [Auto]
    Trd2rd(Different Rank)....................:8 [Auto]
    Twr2wr(Different Rank)...................:8 [Auto]
    Twr2rd(Different Rank)...................:7 [Auto]
    Trd2wr(Same/Diff Rank)..................:9 [Auto]
    Dimm1 Clock Skew Control...............:[Auto]
    Dimm2 Clock Skew Control...............:[Auto]
    DDR Write Training......................:[Auto]

    Motherboard Voltage Control
    Load-Line Calibration..................: [Disabled]
    CPU Vcore..............................:1.25000 [1.25]
    CPU Termination........................:1.220V [1.220v]

    CPU PLL................................:1.500V [1.5v]

    CPU Reference..........................:0.760V [Auto]

    MCH Core...............................:1.100V [1.24v]
    MCH Reference..........................:0.7600V [.812v]
    MCH/DRAM Ref...........................:0.900V [.910v]
    ICH I/O................................:1.500V [1.5v]
    ICH Core...............................:1.100V [1.1v]

    DRAM
    DRAM Voltage ..........................:1.800V [2.080V]
    DRAM Termination.......................:0.900V [Auto]
    Channel A Reference....................:0.900V [Auto]
    Channel B Reference....................:0.900V [Auto]

    Advanced Settings
    Limit CPUID Max. to 3.....................: [Disabled]
    No-Execute Memory Protect............: [Enabled]
    CPU Enhanced Halt (C1E)................: [Disabled]
    C2/C2E State Support....................: [Disabled]
    x C4/C4E State Support..................: [Disabled]
    CPU Thermal Monitor 2(TM2) ...........: [Enabled]
    CPU EIST Function.........................: [Disabled]
    Virtualization Technology................: [Enabled]

    Integrated Peripherals
    Legacy USB Storage Detect ..............[Enabled]
    .................................................. .........................
    Last edited by climber; 05-26-2009 at 04:26 AM.
    Q9550 e0
    EP45 Ud3r rev. 1.1 f5 bios
    Gskill 2GBX4 F2-8500CL5D-4GBPK DDR2 1066 (PC2 8500) 2.0-2.1 volts
    GigabyteGV-N660OC-2GD GeForce GTX 660 2GB
    Windows 7
    Asus arctic square CPU cooler
    Rosewill 600watt PSU

  4. #4
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    Default Re: CPU Voltage spike during OCCT test

    There's no way that voltage spike is real. Erronious reading IMO. Repeat another test with OCCT using the same settings and see if it appears again.
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  5. #5

    Default Re: CPU Voltage spike during OCCT test

    I see this in OCCT sometimes as well, but only since I went to the latest versions. No way is it real. Spike to 3+ V and the CPU is still alive? I highly doubt it.
    i7 3770K, 47X100= 4.7GHz at 1.33V, ASROCK Z77 Extreme4, 2 X 4GB Patriot Viper Black Maba DDR3 1600, GTX 590, 2 X Corsair Force 3 120GB SSDs in RAID 0, Barracuda SATA 7200.10 500GB, Barracuda SATA 7200.11 1000GB Back Ups, OCZ ZX 1250W, Z-5500s, LG Blu Ray Player/DVD Burner, Koolance CTR-CD12 Fan/Pump Controller, Windows 7 X64 Professional, HAF X. Vision Quest 24" WS LCD, Optoma H66 Projector
    Cooling: Thermochill PA120.2 GT AP15 in push, DDC 3.25/XSPC Res top, Apogee Xt Extreme, XSPC Razor, Coolgate CG-240 Swiftech Helix in push/pull, MCP35X.

  6. #6
    Join Date
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    Default Re: CPU Voltage spike during OCCT test

    I ran it again, and it was fine... Scared the crap out of me though.
    Q9550 e0
    EP45 Ud3r rev. 1.1 f5 bios
    Gskill 2GBX4 F2-8500CL5D-4GBPK DDR2 1066 (PC2 8500) 2.0-2.1 volts
    GigabyteGV-N660OC-2GD GeForce GTX 660 2GB
    Windows 7
    Asus arctic square CPU cooler
    Rosewill 600watt PSU

  7. #7
    profJim's Avatar
    profJim is online now Chief Munchkin + moderator
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    Default Re: CPU Voltage spike during OCCT test

    I've noticed occasional random voltage spikes or dips with OCCT v3.01.
    Not a problem for me.
    I did notice that its built-in monitoring function accurately tracks my EP45-UD3P 12 volt readings correctly. Now if the other monitoring programs could only do the same.
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