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Thread: GA-EP45-UD3P rev 1.0 Fails to POST with CPU Host Clock Control enabled.




  1. #1
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    Default GA-EP45-UD3P rev 1.0 Fails to POST with CPU Host Clock Control enabled.

    Hi all,

    I've been out of the PC world for about 5 years and am now building a new PC from scratch. As the motherboard I chose Gigabyte GA-EP45-UD3P and got the rev 1.0 board.

    My problem is as follows. I am unable to get the system to POST when the CPU Host Clock Control is set to ENABLED in M.I.T. in BIOS. Everything works fine when it is set to DISABLED.

    The BIOS version is updated to F8 (the board came with F4). I load the Fail Safe defaults the board works ok. The only change is enabling the CPU Host Clock Control and the board fails to POST then shuts down loads the "previous know good BIOS settings" and boots to Vista ok.

    This behavior puzzles me. I have tried searching the forums a bit but found no fixes so any advice or pointers are greatly appreciated.
    --
    Gigabyte GA-EP45-UD3P rev 1.0 BIOS F8
    E7400
    Kingston 4GB(2*2GB) PC2-6400 CL5
    MSI R4780-MD1G
    Enermax Modu82+ 625W

  2. #2

    Default Re: GA-EP45-UD3P rev 1.0 Fails to POST with CPU Host Clock Control enabled.

    Um I had the F8 bios on here(v1.1 board) but was no good so I use the usb stick,fomatted fat and went back to F7 it works great.

    make sure you have all the usb stuff enabled to usb flash if you do.

    Don't flash in windows.

    use Q Flash

    And if your board is v1 get the version 1 bios.

    below:


    GIGABYTE - Support&Download - Motherboard - BIOS - GA-EP45-UD3P (rev. 1.0)
    Asus P8Z68-V PRO/GEN3 bios 3202
    2500k@4.7GHZ.
    CM Hyper 212 EVO blademasters push-pull
    8GB's Samsung 30nm tech ram 1.35v
    EVGA GTX 460 superclocked plus (part# 1G-P3-1372-TR)
    Seasonic X660
    Canada

  3. #3
    profJim's Avatar
    profJim is online now Chief Munchkin + moderator
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    Default Re: GA-EP45-UD3P rev 1.0 Fails to POST with CPU Host Clock Control enabled.

    Read the Bios Flashing Guide.

    Immediately after your flash has completed, you must reboot and immediately enter the bios, where you will LOAD OPTIMIZED DEFAULTS. Fail-safe defaults are quirky at best.

    Next you need to manually set DRAM voltage to its rated specs, usually 2.0 - 2.1 volts.

    Do NOT enable cpu host clock control at this time.

    Your goal at this time is to verify that you have a stable system with stock settings. You should set:

    Motherboard Voltage Control
    Voltage Type.………... Manual
    CPU
    CPU Vcore….……….......x.xxxxx........: <== manually set this to the x.xxxxx value displayed in your bios
    CPU Termination…..... 1.200V*.......: <== manually set this to the value displayed in your bios
    CPU PLL…………………....1.500V*.......: <== manually set this to the value displayed in your bios
    MCH/ICH
    MCH Core…………….....1.100V...........: << 1.20V <== with 2x2GB or more memory

    DRAM
    DRAM Voltage ……....1.800V............: <== manually set this to the rated value of your memory [usually 2.00 - 2.10 volts]

    Advanced Settings

    CPU Enhanced Halt (C1E)................: [Disabled] <== when overclocking
    C2/C2E State Support.....................: [Disabled] <== when overclocking
    x C4/C4E State Support..................: [Disabled] <== when overclocking
    CPU EIST Function...........................: [Disabled] <== when overclocking

    ==========
    Save bios settings and exit.

    Now you need to run an extended Memtest86+ test [from your cdrom or floppy drive] to verify that your setup is stable. An overnight test is best. If the extended test is error free, you're ready to lock & load.

    When you're ready to tweak or overclock, there are additional bios settings that will need to be changed. If you have any problems, download the the generic bios template, and note the bios settings that you're currently using. Be sure to include a link to your memory's specs in your post.

    Good Luck.

    **edit** Tyreman is referring to rev: 1.1 mobo, but I'm pretty sure that the F8 bios was problematic on the 1.0 mobos too. I'm using F6 without problems and there is an F9b beta bios available if your adventurous.
    Last edited by profJim; 04-04-2009 at 06:53 PM. Reason: additional info
    Q9650 @ 4.10GHz [9x456MHz]
    P35-DS4 [rev: 2.0] ~ Bios: F14
    4x2GB OCZ Reaper PC2-8500 1094MHz @5-5-5-15
    MSI N460GTX Hawk Talon Attack (1GB) video card <---- SLI ---->
    Seasonic SS-660XP2 80 Plus Platinum psu (660w)
    WD Caviar Black WD6401AALS 640GB (data)
    Samsung 840 Pro 256GB SSD (boot)
    SLI @ 16/4 works when running HyperSLI
    Cooler Master 120XL Seidon push/pull AIO cpu water cooling
    Cooler Master HAF XB computer case (RC-902XB-KKN1)
    Asus VH242H 24" monitor [1920x1080]
    MSI N460GTX Hawk (1GB) video card
    Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium
    HT|Omega Claro plus+ sound card
    CyberPower CP1500PFCLCD UPS
    E6300 (R0) @ 3.504GHz [8x438MHz] ~~ P35-DS3L [rev: 1.0] ~ Bios: F9 ~~ 4x2GB Kingston HyperX T1 PC2-8500, 876MHz @4-4-4-10
    Seasonic X650 80+ gold psu (650w) ~~ Xigmatek Balder HDT 1283 cpu cooler ~~ Cooler Master CM 690 case (RC-690-KKN1-GP)
    Samsung 830 128GB SSD MZ-7PC128B/WW (boot) ~~ WD Caviar Black WD6401AALS 640GB (data) ~~ ZM-MFC2 fan controller
    HT|Omega Striker 7.1 sound card ~~ Asus VH242H monitor [1920x1080] ~~ Logitech Z-5500 Digital 5.1 Speakers
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    .


  4. #4
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    Default Re: GA-EP45-UD3P rev 1.0 Fails to POST with CPU Host Clock Control enabled.

    Hi again,

    Thanks for your help,

    Re-flashed the BIOS back to F7 (rev 1.0 BIOS) as per instructions on the Bios Flashing Guide. I used @BIOS the first time around but will not use it in the future.

    After flashing loaded the OPTIMIZED DEFAULTS then made the other changes as suggested by profJim. I have not run MemTest86+ yet, will do that later before actually trying to OC the system (I understand that I need a stable working system before starting with OC). Unfortunately the situation did not change and the system still does not POST with CPU HOST CLOCK ENABLED.

    Allow me to clarify the original problem. The part that puzzles me is the fact that merely enabling the CPU HOST CLOCK CONTROL makes the system crash. I do not try to over clock the system. The CPU HOST FREQUENCY is set to 266 MHz. The default value when the CPU HOST CLOCK CONTROL is disabled and still the system will not POST.

    It looks like the CPU HOST CLOCK CONTROL setting does something else than merely allow you to adjust the CPU HOST CLOCK. The way I see it enabling the CPU HOST CLOCK CONTROL and setting the CPU HOST FREQUENCY to 266 MHz is just manually making the same settings the system would use as default.

    Enable the CPU HOST CLOCK CONTROL and the system will not POST. Disable it and the system runs perfectly.

    memory specs Kingston: KVR800D2N5K2/4G


    Current BIOS settings
    MB Intelligent Tweaker(M.I.T.)
    Robust Graphics Booster ...............: Auto
    CPU Clock Ratio ..........................: 10x
    Fine CPU Clock Ratio.....................:.+0.5
    CPU Frequency ...........................: 2.80GHz (266x10.5)


    Clock Chip Control
    Standard Clock Control
    CPU Host Clock Control..................: [Disabled]
    CPU Host Frequency (Mhz) ............: 266Mhz
    PCI Express Frequency (Mhz) .........: Auto

    C.I.A.2 .................................:[Disabled]


    Advanced Clock Control [Press Enter]
    CPU Clock Drive...........................: <<< 800
    PCI Express Clock Drive.................: <<< 900
    CPU Clock Skew (ps)....................: <<< 0ps
    MCH Clock Skew (ps)...................: <<< 0ps


    DRAM Performance Control
    Performance Enhance...................: [STANDARD]
    (G)MCH Frequency Latch...............: [266]
    System Memory Multiplier ..............: 3.00A
    Memory Frequency (Mhz) ..............: 800
    DRAM Timing Selectable ................: [Auto]

    Standard Timing Control
    CAS Latency Time........................ 5 Auto
    tRCD ......................................... 5 Auto
    tRP'........................................... 5 Auto
    tRAS.......................................... 18 Auto

    Set all Suggested below to highest Values first. Then later you can lower, one at a time, testing as you go

    Advanced Timing Control
    tRRD........................................... 3 Auto
    tWTR.......................................... 3 Auto
    tWR............................................ 6 Auto
    tRFC........................................... 52 Auto
    tRTP........................................... 3 Auto
    Command Rate (CMD) ....................: 0 Auto

    Channel A : All Auto
    Channel B : All Auto

    Motherboard Voltage Control
    Load-Line Calibration...................: Disabled
    CPU
    CPU Vcore….……….........................: 1.26250V
    CPU Termination…..... 1.200V*.......: 1.2V
    CPU PLL…………………....1.500V*.......: 1.5V
    CPU Reference………....0.755V*.......: Auto

    MCH/ICH
    MCH Core…………….....1.100V...........: 1.2V
    MCH Reference….…….0.800V...........: Auto
    MCH/DRAM Ref.…......0.900V...........: Auto
    ICH I/O……………….....1.500V............: Auto
    ICH Core…………...……1.100V............: Auto

    DRAM
    DRAM Voltage ……....1.800V............: 1.8V
    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) ...........: [Disabled]
    CPU EIST Function.........................: [Disabled]

    Integrated Peripherals
    Legacy USB Storage Detect ..............[Enabled] *Note* Must be enabled to flash from USB
    --
    Gigabyte GA-EP45-UD3P rev 1.0 BIOS F8
    E7400
    Kingston 4GB(2*2GB) PC2-6400 CL5
    MSI R4780-MD1G
    Enermax Modu82+ 625W

  5. #5
    kick's Avatar
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    Default Re: GA-EP45-UD3P rev 1.0 Fails to POST with CPU Host Clock Control enabled.

    Sounds odd..

    1.save the (cpu host clock disabled) settings directly using the F11 key.
    post up and load the settings using F12.
    2.change to cpu host clock enabled,save the whole bios settings again,to a different slot.
    Then you will be able to check if anything else has changed just by loading each bios setting to compare with just a keystroke.

    If there is no change actually enter the cpu host freqsetting manually and see if it boots up ok.

    My bios now "remembers" my memory timings 4-4-4-12 instead of what it auto booted as when i first turned the machine on (5-5-5-15)and optimimum defaults doesnt make it "forget"
    Optimum defaults also disables my cpu fan speed regulation :).. this may/may not have occured after I did my one bios update so far.
    Then again my cpu cooler has a seperate fan speed regulation knob and that setting may confuse the bios.
    Current Systems:

    Asrock p67 Extreme6.............. Gigabyte EP-45 UD3 ...................... Gigabyte 73 PVM S2
    Intel i5 2500k 4.8ghz................ Intel Q8400 3.8ghz......................... Intel D820 2.8ghz
    Zalman 10x cooler.................... Coolermaster V8............................ HP cooler
    8GB Gskill ripjaw ddr3.............. 4GB Gskill PI ddr2.......................... 4GB samsung ddr2
    60GB ssd/500GB HDD .............. WD 1TB hdd.................................... Seagate 160GB hdd
    GTX 460 1GB x2 SLI ................. Msi 9600GT 512MB(died) ........... Onboard gx
    Win7 64 ,750w psu(ocz)............ Win7 64 ,520w psu,seasonic...... Win XP pro ,400w psu

    HEC 6A34 case . ....................... Jeantec R2 case............................ Packard Bell case

    hoping to upgrade to http://www.thinkgeek.com/stuff/41/habicase.shtml
    http://www.flixya.com/video/140325/Animal-launching

  6. #6
    profJim's Avatar
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    Default Re: GA-EP45-UD3P rev 1.0 Fails to POST with CPU Host Clock Control enabled.

    I fully understand the CPU HOST CLOCK CONTROL issue, but your primary initial problem was using FAIL SAFE defaults.

    I've never seen a problem with enabling CPU HOST CLOCK CONTROL. After enabling, did you change any other bios settings, especially CPU HOST FREQUENCY or the memory multiplier?

    I have seen setups where the memory speed is automatically set to an absurdly high level if you have have the wrong combination of AUTO and MANUAL cpu/memory settings.

    A quick check of your memory shows that is specified to run ONLY at 1.8 volts. It looks like it's value memory, which is fine for stock setups. This memory might have very limited overclocking limits.

    **edit**
    PCI Express Frequency (Mhz) .........: Auto <== manually set this to 100
    Last edited by profJim; 04-05-2009 at 06:25 PM. Reason: additional info
    Q9650 @ 4.10GHz [9x456MHz]
    P35-DS4 [rev: 2.0] ~ Bios: F14
    4x2GB OCZ Reaper PC2-8500 1094MHz @5-5-5-15
    MSI N460GTX Hawk Talon Attack (1GB) video card <---- SLI ---->
    Seasonic SS-660XP2 80 Plus Platinum psu (660w)
    WD Caviar Black WD6401AALS 640GB (data)
    Samsung 840 Pro 256GB SSD (boot)
    SLI @ 16/4 works when running HyperSLI
    Cooler Master 120XL Seidon push/pull AIO cpu water cooling
    Cooler Master HAF XB computer case (RC-902XB-KKN1)
    Asus VH242H 24" monitor [1920x1080]
    MSI N460GTX Hawk (1GB) video card
    Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium
    HT|Omega Claro plus+ sound card
    CyberPower CP1500PFCLCD UPS
    E6300 (R0) @ 3.504GHz [8x438MHz] ~~ P35-DS3L [rev: 1.0] ~ Bios: F9 ~~ 4x2GB Kingston HyperX T1 PC2-8500, 876MHz @4-4-4-10
    Seasonic X650 80+ gold psu (650w) ~~ Xigmatek Balder HDT 1283 cpu cooler ~~ Cooler Master CM 690 case (RC-690-KKN1-GP)
    Samsung 830 128GB SSD MZ-7PC128B/WW (boot) ~~ WD Caviar Black WD6401AALS 640GB (data) ~~ ZM-MFC2 fan controller
    HT|Omega Striker 7.1 sound card ~~ Asus VH242H monitor [1920x1080] ~~ Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium ~~ CyberPower CP1500PFCLCD U.P.S
    .


  7. #7
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    Default Re: GA-EP45-UD3P rev 1.0 Fails to POST with CPU Host Clock Control enabled.

    You could also try to reset your cmos and the save defaults,then try again so failures will mess with your bios,imo
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  8. #8

    Default Re: GA-EP45-UD3P rev 1.0 Fails to POST with CPU Host Clock Control enabled.

    System Memory Multiplier ..............: 3.00A

    try to set it to 2.00D

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