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Thread: OC E8500+EP45 Voltage Question




  1. #1
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    Default OC E8500+EP45 Voltage Question

    I have overclocked my E8500 to 3.6Ghz, but I have a couple of questions regarding voltage and how to find out what voltage to use-

    I ran orthos (blend) on my CPU for 8 hours with no errors at these settings-

    Vcore- 1.3v
    CPU Termination-1.3v
    MCH Core-1.2v

    Does that mean I slowly need to "tweak" these numbers down now?

    Thx for the help :)
    "The Anthrax Spore"
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  2. #2
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    Default Re: OC E8500+EP45 Voltage Question

    They don't look high to me as they are, but I have only briefly played with an ep45-ds3, and run an x48-dq6.
    I'm curious why you didn't use your full 9.5 multiplier for 3.8GHz?
    For anyone to really help you should get an EP45 bios template from http://forums.tweaktown.com/f69/giga...ettings-33613/

    Open your bios and copy all settings into the template and post it here. Add a short explanation of what you want to achieve?





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  3. #3
    Acebmxer's Avatar
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    Default Re: OC E8500+EP45 Voltage Question

    Quote Originally Posted by sharpbiohazard View Post
    I have overclocked my E8500 to 3.6Ghz, but I have a couple of questions regarding voltage and how to find out what voltage to use-

    I ran orthos (blend) on my CPU for 8 hours with no errors at these settings-

    Vcore- 1.3v
    CPU Termination-1.3v
    MCH Core-1.2v

    Does that mean I slowly need to "tweak" these numbers down now?

    Thx for the help :)
    Those numbers are fine. But that Cpu should be able to FLY depending on if you have a good cooler on it. If thats as far as you wanna push it then yea start to lower then untill you lose stablity. But if you wanna keep going 1.45 is max for Vcore 1.4 for cpu term 1.6-1.63 cpu Pll 1.4 mch

    Edit - I notice you are using a very old bios in your sig. You might wanna try updating to the newest one you might find it to require to use less voltage for the same over clock or might be able to go higher on the same voltages :)
    Last edited by Acebmxer; 09-10-2009 at 11:35 AM.
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  4. #4
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    Default Re: OC E8500+EP45 Voltage Question

    Quote Originally Posted by Salty View Post
    I'm curious why you didn't use your full 9.5 multiplier for 3.8GHz?
    Well, I just got my ram figured out at a 400FSB so I figured I'm stuck at 3.6. Im a total noob to overclocking. I just went through all of this for my RAM http://forums.tweaktown.com/f69/inco...45-ud3r-34224/

    My BIOS settings are on the 3rd page- LSD's suggestions.

    What settings do I ratchet down first out of those 3 voltage settings? Do I just set it until my CPU doesnt boot?

    I have a Xigmatek HDT SD964 cooler with OCZ freeze.
    "The Anthrax Spore"
    GA-EP45-UD3R Rev#1.1-F11
    C2Q Q9550 (E0) 2.83Ghz 333x8.5
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    Gigabyte 5870 1GB DDR5
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    Antec 900
    ASUS VH236H 1920X1080

    "Gangrene"

    ASUS P5Q Pro Turbo
    C2D E8500 (E0) 3.16Ghz 333x9.5
    Zalman CNPS7000C-AlCu
    2x2GB Corsair XMS2 PC2-8500 [TWIN2X4096-8500C5C G] DDR2 800 555-18 1.8v
    XFX 9600GSO 768MB DDR2
    FSP 460w
    Antec 300
    Acer P224w 1680x1050

  5. #5
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    Default Re: OC E8500+EP45 Voltage Question

    In your bios, set:
    CPU Clock Ratio ..........................:[ 9]
    Fine CPU Clock Ratio.....................:[.5]
    CPU Frequency ...........................: [400]

    The fsb stays 400 and does not change ram settings, but you get (9.5 x 400) 3.8GHz, easily. This is not a big overclock for an E8500.

    On my x48-dq6 for 3.8GHz settings:

    System Voltage Control____ [Manual]
    DDR2 OverVoltage Control__ [+0.3] = 2.1V (I have 1066MHz ram)
    PCI-E OverVoltage Control_ [+0.1V] for stability
    FSB OverVoltage Control___ [+0.1V] for stability
    (G)MCH OverVoltage Control [+0.2V] for 4Gig of ram, ignore if u use 2Gig
    Loadline calibration ____[Auto]
    CPU Voltage Control_______ [1.300]

    You have EP45, maybe different, but yr voltages look fine to x48 owner.

    If you are looking for minimum power consumption you can try scaling back. Then test with Prime95 or similar. Even if it boots, it is not necessarily stable, so u test it out for hour/s and use the lowest volts your setup is actually stable at. (i.e. passes Prime with no errors)

    Download "Hardware Monitor" and "RealTemp". Check cpu and system temps while running Prime, Orthos, OCCT, LinX or whatever. The cooler things run the better, so a well ventilated case with plenty of fans is a good thing.

    Standard Intel heatsink is marginal, and can be easily installed with one pin not fully seated which can cause higher temps.

    Are you wanting to scale back because of temps? At those voltages I would not expect high temps.
    Last edited by Salty; 09-10-2009 at 03:31 PM.





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    Cooling = EK HF Full Nickel
    - XSPC RX360 - Laing DDC 18W - XSPC Bay Reservoir
    Motherboard = GA-X58A-UD3R Revision 2
    , BIOS Version = Award FC
    Ram = 3x2gig Corsair TR3X6G1600C8D G
    Video = 2 X Palit GTX460 Sonic Platinum 1GB OC sli
    Monitor = 22" LG Flatron W2242T 1680 x 1050 Case = Coolermaster CM690
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  6. #6
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    Default Re: OC E8500+EP45 Voltage Question

    In your other thread you stated that you're using 2x2GB Ballistix Tracer ram.
    You should add this info to your forum signature.

    Higher Cpu Termination (VTT) can help with stability, but it is usually set at least 0.05 - 0.10 volts lower than Cpu Vcore.
    Some ignore this recommendation when performing extreme overclocks.

    As long as your cpu temperatures aren't too high, I wouldn't bother with trying to lower Cpu Vcore until you've reached your final overclock settings.

    Intel BurnTest (IBT) is good for brief initial stress testing and seeing how well your temperatures are doing. IBT will raise your cpu temps higher than other stress testing programs. You only need to run IBT for 5 - 10 loops. I've passed IBT testing several times, only to have one of the OCCT or Prime95 tests fail.

    When stress testing, I perform 3 separate overnight (or longer) tests to ensure that my system is stable. With Prime95, this means running:
    Small FFTs
    Blend
    Large FFTs
    OCCT offers the same tests, but calls them small, medium, or large data sets.

    You should run gaming benchmarks to see how gaming performance changes with different FSB and memory settings.
    This type of real world testing is more meaningful than running synthetic benchmarks.

    You can save up to 8 different bios profiles. This is very useful if you want to restore the saved bios settings at a later time. From the main bios screen, F11 is used to save your current bios settings and F12 is used to load one of the saved profiles. You still need to keep a hard-copy of your profiles, including settings that aren't fully stable. You can overwrite a previous saved profile with a newer profile at any time.

    Your system should easily be able to run at 3.80 - 4.00GHz. Your memory should be fine up to 1066MHz and possibly a bit higher. Often the best overall performance will be with memory speeds in the 900 - 1000MHz range using tighter memory timings.
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  7. #7
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    Default Re: OC E8500+EP45 Voltage Question

    Thanks a lot guys- you really cleared up a lot of my confusion. :)

    My temps are typically 35C-I and the highest I've seen under load is 55C. So yeah.

    I just got done running Orthos overnight on small FFT- The CPU stress test
    Power was-
    Vcore-1.25
    Termination-1.24
    MCH Core-1.2

    No errors or hangs, so I guess thats a good sign. Now onto the 3.8 Ghz!

    Oh, and I'm afraid to oc my ram- I keep reading on newegg about all of these people where they say their ram crapped out after about 3-5 months- multiple errors on memtest, BSODs etc. :S
    Last edited by sharpbiohazard; 09-10-2009 at 11:55 PM.
    "The Anthrax Spore"
    GA-EP45-UD3R Rev#1.1-F11
    C2Q Q9550 (E0) 2.83Ghz 333x8.5
    Xigmatek HDT-SD964
    2x2GB Kingston HyperX T1 [KHX8500D2T1K2/4G]
    DDR2 1066 555-15 2.2v
    Gigabyte 5870 1GB DDR5
    X-Fi Xtremegamer
    Antec 750w Truepower
    Antec 900
    ASUS VH236H 1920X1080

    "Gangrene"

    ASUS P5Q Pro Turbo
    C2D E8500 (E0) 3.16Ghz 333x9.5
    Zalman CNPS7000C-AlCu
    2x2GB Corsair XMS2 PC2-8500 [TWIN2X4096-8500C5C G] DDR2 800 555-18 1.8v
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  8. #8
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    Default Re: OC E8500+EP45 Voltage Question

    Fear is the enemy eh? That's ok. I've not had any dead ram from overclocking yet, touch wood.





    CPU
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    Cooling = EK HF Full Nickel
    - XSPC RX360 - Laing DDC 18W - XSPC Bay Reservoir
    Motherboard = GA-X58A-UD3R Revision 2
    , BIOS Version = Award FC
    Ram = 3x2gig Corsair TR3X6G1600C8D G
    Video = 2 X Palit GTX460 Sonic Platinum 1GB OC sli
    Monitor = 22" LG Flatron W2242T 1680 x 1050 Case = Coolermaster CM690
    PSU = Corsair HX850
    OS = Windows 7 Professional x64


  9. #9
    Lsdmeasap's Avatar
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    Default Re: OC E8500+EP45 Voltage Question

    Not tracers, but you can see I pushed pretty hard on the new 2.0V rated Ballistix in the review link in my signature. No issues with them so far since either

    Your tracers do come programmed with a 1000Mhz SPD Profile anyway, so you can for sure do that without harm so you have nothing to worry about really

  10. #10
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    Default Re: OC E8500+EP45 Voltage Question

    Oh, and I'm afraid to oc my ram- I keep reading on newegg about all of these people where they say their ram crapped out after about 3-5 months- multiple errors on memtest, BSODs etc. :S
    Go back and re-read the Newegg reviews in another month, after you've gained some more experience.

    I'm a big fan of Newegg reviews, but ....
    When it comes to mobo or memory reviews, about 1/3 of the reviewers have no business seeing the inside of a computer case, let alone tweaking the bios. It really cracks me up when I read about a reviewer's sniveling about the fact that his mobo doesn't properly auto-detect the memory settings and his memory doesn't run at its rated speed.

    With my memory, I've had several hundred-thousand Memtest86+ errors when my memory tweaks weren't stable. I like to think that I kinda know what I'm doing.

    Don't worry.... be happy, you've got a nice hardware setup.
    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
    .


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