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Thread: Stable E8400 - 3.83GHz (updated)




  1. #1
    Join Date
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    Default Stable E8400 - 3.83GHz (updated)

    Hello TweakTown members

    It's been a while since I last posted, but after all the excellent feedback I received from my stable E8400 settings, I felt obliged to discuss some stability observations that have required me to adjust a value that I once thought stable. If you're just looking for the setting, click the link in my signature. I updated the value in that thread. It's the CPU Termination voltage. I had it at 1.200V. It now needs to be 1.220V.

    After passing prime for 20 hours, I thought everything was stable. Recently I have bought a high definition video camera and have been using Cyberlink Powerdirector 7 Ultra to edit hi-def video. As you might assume, this is some serious CPU-intensive work. In addition, Cyberlink makes use of Nvidia CUDA technology to offload some processing to your video card. So we're stressing the PCIe bus, the CPU, the memory, basically the whole lot.

    So everything was running famously until I decided to create a movie that was over an hour in length. Encoding for this in hi-def would take about 12 hours. To my astonishment, I got crashes about 3 hours in every time. Temperatures were not particularly high, either.

    I ran Orthos Prime and crashed at 22 hours! What a b'stard! Here I was thinking I was stable at 20 hours. Long story short, bumping up CPU termination voltage one notch gave me the headroom I needed. I'm Orthos Prime stable at 34 hours, and I encoded my hi-def movie to completion. It took 11 hours and 12 minutes in the end.

    For those of you that are still looking for my 4.0 GHz config, be patient, my friends. Bank-vault stability takes time and testing.

    Hope this helps some of you.
    Gigabyte EP45-UD3R (F7 BIOS)
    Intel Pentium E8400 E0
    Arctic Cooling Freezer 7 Pro
    G.Skill DDR2 1066 (2x2GB) 5-5-5-15 @ 2.0V~2.1V
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    CORSAIR 650TX 650W PSU
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    Stable E8400 OC - stock voltages
    Stable E8400 OC - 3.83

  2. #2

    Default Re: Stable E8400 - 3.83GHz (updated)

    I had a similar Prime Large FFT failure at 24hrs 15mins, I would have stopped it at 24hrs too if I had been around too!

    Pop along to my thread, been some great input for us E8400 owners.

    I have 470x8.5 stable, currently testing 480x8.5...
    * CPU: Intel i7-3770K @ Stock * Cooling: Corsair H80i / Noctua NF-F12 x2 * MoBo: Gigabyte GA-Z77X-UD5H (Rev. 1.1 - BIOS F16 Mod16) * RAM: Crucial 1600MHz DDR3 32GB (4x8GB) *
    * GPU: Intel HD 4000 (768MB) * Mon 1: Dell U2410 (A07) * Mon 2: Panasonic TX-P55VT50B * Cam: Logitech C910 HD * BD: Pioneer BDR-208DBK * HD 1: Crucial SSD M4-CT256M4SSD2 256GB *
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  3. #3
    Join Date
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    Default Re: Stable E8400 - 3.83GHz (updated)

    Good info. What one presumes as stable can sometimes not be depending on the usage of the system, and this is an excellent example of that.

    Stress testing can sometimes be uncertain. I have noted for example that things like Prime95 workers, where one core is significantly (3 or more) FFT's behind the other(s) is usually a voltage(s) issue. Prime may complete stable, but another warning sign is relatively low temps when running IBT. Eg at 1.41825Vcore, it's prime 12hr stable, but one core lags, and IBT max temps are 64c with speed at 16GFlops. One bump on Vcore sees FFTs in sync +/-1 and IBT temps of 71c and 24GFlops speed (C2D E7400 @ 3.9GHz).

    Glad you got it dialed in, and that it didn't corrupt any precious video files.

    Seems like you've got it all covered, however may I make a suggerstion for 4GHz?

    Adjust your FSB for 4GHz as you normally would and try thwese voltages when you start to tinker:

    Code:
    Load Line Calibration..................: [Disabled]
    CPU Vcore...............1.25000V.......: 1.28750V <- Possibly up to 1.325V, almost certainly lower though if an E0 stepping.
    CPU Termination.........1.200V.........: 1.220V <-1.260V
    CPU PLL.................1.500V.........: 1.500V <-1.570V
    CPU Reference...........0.760V.........: [Auto]  <-Try one notch higher (0.785V) after setting CPU Term to 1.200V, then set back to 1.260V.
    
    MCH/ICH
    MCH Core................1.100V.........: 1.220V
    MCH Reference...........0.760V.........: [Auto] <-Try one notch lower (0.745V) after setting 1.200V CPU Term, then restore CPU Term to 1.260V
    MCH/DRAM Reference......0.900V.........: [Auto]
    ICH I/O.................1.500V.........: 1.500V
    ICH Core................1.100V.........: 1.100V <-Possibly 1.200V, I get USB issues at 1.100V, may be my system/USB devices though.
    
    DRAM
    DRAM Voltage............1.800V.........: 2.020V 
    DRAM Termination........0.900V.........: [Auto]
    Channel A Reference.....0.900V.........: [Auto]
    Channel B Reference.....0.900V.........: [Auto]
    Try setting Vcore, MCH ref and CPU term to the suggestions first. If unstable, combine with the higher CPU Ref.

    Good luck!
    Last edited by Psycho101; 06-01-2009 at 12:59 AM.
    Coolermaster CM 690 II advance Case
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  4. #4
    Join Date
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    Default Re: Stable E8400 - 3.83GHz (updated)

    Hey

    Just want to say that your settings are awesome. But the links under your sig don't seem to work, they just redirect you back to the home forums. What's up with that?

    I really need those 3.83 Stable settings! :D

    Thanks

  5. #5
    Chike is offline Senior Member
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    Default Re: Stable E8400 - 3.83GHz (updated)

    Changes in the forums invalidated the links.
    Stable E8400 OC - stock voltages
    Stable E8400 OC - 3.83

  6. #6
    Join Date
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    Default Re: Stable E8400 - 3.83GHz (updated)

    Yeah, sorry about that. Thanks to the above poster, I've now fixed my signature. :)
    Last edited by Outer Marker; 03-22-2011 at 10:42 AM.
    Gigabyte EP45-UD3R (F7 BIOS)
    Intel Pentium E8400 E0
    Arctic Cooling Freezer 7 Pro
    G.Skill DDR2 1066 (2x2GB) 5-5-5-15 @ 2.0V~2.1V
    EVGA GeForce 9800 GT 512MB
    (3x) Seagate Barracuda 250GB SATA II Drives
    CORSAIR 650TX 650W PSU
    Cooler Master Centurion 5 Case
    XP Professional 32-bit SP3

    Stable E8400 OC - stock voltages
    Stable E8400 OC - 3.83

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