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Thread: Very strange behaviour after changing PC case and PSU




  1. #81
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    Default Re: Very strange behaviour after changing PC case and PSU

    LOL yeah I have too much time on my hands I guess, I only work half-time, 20hrs/week so you were more accurate than I thought :p :)

    Anyway I brought the mems down to 1:1. Set fsb to 400 Vcore@1.2375 and ran Orthos SmallFFTs - FAIL within 10 secs.

    Upped Vcore to 1.2437 - FAIL within 10 secs

    Upped Vcore to 1.2500 - FAIL within a few min

    Upped Vcore to 1.256 - FAIL after 12 min

    Upped Vcore to 1.262 - FAIL after 48 min

    Gonna up another notch now
    Last edited by LaZ; 06-30-2008 at 03:08 AM.
    Mobo - Gigabyte GA-EX38-DS4
    CPU - Intel Core 2 Duo E8400 @3.6GHz
    RAM - Mushkin Redline XP2 PC8000
    GFX - Gigabyte Geforce 8800GT Type B
    PSU - Hiper Type R MKII 680W

  2. #82
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    Lsdmeasap is offline GIGABYTE Guru
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  3. #83
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    Default Re: Very strange behaviour after changing PC case and PSU

    I think I found the sweetspot now. 400x9 3.6GHz @ 1.2687Volt, mems at 5-5-5-18 1:1 @ 800MHz. Been running Orthos small FFTs for 4hours now with no errors. Gonna run it again tomorrow for an even longer run.

    Realtemp showing Idle 30 and 100% load 52 degrees. Touching the mems, they are warm but not hot, same goes for the MCH a bit warm but not hot.

    CPU fan annoyingly load - Sounds like an airplane or something hehe, really need to get myself a better cooler. Will invest in a Thermalright HR-01 Plus as soon as I can afford.
    Last edited by LaZ; 06-30-2008 at 07:05 AM.
    Mobo - Gigabyte GA-EX38-DS4
    CPU - Intel Core 2 Duo E8400 @3.6GHz
    RAM - Mushkin Redline XP2 PC8000
    GFX - Gigabyte Geforce 8800GT Type B
    PSU - Hiper Type R MKII 680W

  4. #84
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    Default Re: Very strange behaviour after changing PC case and PSU

    Sounds good. Yeah those intel fans are pretty bad, get a Ultra120 or a Tuniq Tower

  5. #85
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    Default Re: Very strange behaviour after changing PC case and PSU

    Yeah the Thermalright Ultra 120 rocks... the "Thermalright HR-01 Plus" has also gotten some really sweet reviews, listed as No.1 at silentpcreview.com, I really want a as quiet computer as possible, IŽll add a Nexus 120 fan to the Thermalright HR-01 Plus, or maybe a papst fan what ever is the best one.
    Mobo - Gigabyte GA-EX38-DS4
    CPU - Intel Core 2 Duo E8400 @3.6GHz
    RAM - Mushkin Redline XP2 PC8000
    GFX - Gigabyte Geforce 8800GT Type B
    PSU - Hiper Type R MKII 680W

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  7. #87
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    Default Re: Very strange behaviour after changing PC case and PSU

    I have upped the Vcore to 1.2750 volt but I am still getting errors in Orthos Small FFTs within 0-4 hours. How far do you think I should go?

    I am @ 3.6GHz (400x9) mems at 1:1 5-5-5-18
    Mobo - Gigabyte GA-EX38-DS4
    CPU - Intel Core 2 Duo E8400 @3.6GHz
    RAM - Mushkin Redline XP2 PC8000
    GFX - Gigabyte Geforce 8800GT Type B
    PSU - Hiper Type R MKII 680W

  8. #88
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    Default Re: Very strange behaviour after changing PC case and PSU

    You may need up to 1.35, but highly unlikely. All chips are different so ya never know, dont be scared for sure though.

    I personally would put it at 1.34 and see, then work down as that will likely be not needed. You also need to look at Vdrop, and Vdroop and see what you are actually getting from what you set in the BIOS

  9. #89
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    Default Re: Very strange behaviour after changing PC case and PSU

    Not 100% sure what Vdrop and Vdoop is but it has something to do with the voltage on the core drops under load right?

    At 1.2750 voltage in BIOS CPU-Z shows 1.248V under load and 1.281 in BIOS, showing 1.248 - 1.264 under load in Cpu-Z.
    Last edited by LaZ; 07-01-2008 at 04:33 AM.
    Mobo - Gigabyte GA-EX38-DS4
    CPU - Intel Core 2 Duo E8400 @3.6GHz
    RAM - Mushkin Redline XP2 PC8000
    GFX - Gigabyte Geforce 8800GT Type B
    PSU - Hiper Type R MKII 680W

  10. #90
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    Default Re: Very strange behaviour after changing PC case and PSU

    At 1.281 volts sat in BIOS, Cpu-Z is showing a fluctuation between 1.248 ---> 1.264. Is that a sign for cpu needing more volts?
    Mobo - Gigabyte GA-EX38-DS4
    CPU - Intel Core 2 Duo E8400 @3.6GHz
    RAM - Mushkin Redline XP2 PC8000
    GFX - Gigabyte Geforce 8800GT Type B
    PSU - Hiper Type R MKII 680W

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