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Thread: Very strange behaviour after changing PC case and PSU




  1. #91
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: Very strange behaviour after changing PC case and PSU

    Vdrop is what you get in windows from what you set in the BIOS.
    Vdroop is what you get between Idle and Load from what you set in the BIOS.

    Loadline enabled will try to keep this more stable and closer to what you set, for both. It's affects will vary depending on the voltage selection in the BIOS, meaning some will be better helped and others not so much.

    Yeah, it sounds as if you need more if you are still not stable

  2. #92
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    Default Re: Very strange behaviour after changing PC case and PSU

    Thank you.

    Another question, at what temperatures on the MCH do I need to start worrying?

    After 6hrs of Orthos small FFTs last night I touched the heatsink of the MCH and it is starting to feel more hot than just warm. The mems (ram) is about equally warm as the MCH. Comparing to the heatsink on the CPU the MCH felt warmer, its fanless so I understand that its normal but anyway... better ask and be safe rather than sorry.

    Any good tips about how to add a fan to the MCH? I would rather not remove the heatsink and do a complete mod. Would a 40mm sidemounted fan do the trick? One blowing air from one side of the MCH towards the rear of the chassi where I have a 120mm chassi-fan?
    Last edited by LaZ; 07-02-2008 at 01:03 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

  3. #93
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    Default Re: Very strange behaviour after changing PC case and PSU

    If you cannot hold your finger on it for more then 10 seconds, that is too hot.

    You should in my opinion redo the paste under there, but if you do not feel up to it then you can just buy a 40mm fan and screw it on there. Some screws fit right between the fins on the heatsink. I have also seen others hot glue it on there and or superglue.

    As for sideways, no.... You want it blowing straight down into the heatsink to best cool it, sideways would not put any air into the fins

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    Default Re: Very strange behaviour after changing PC case and PSU

    Thanx. As it is now I could hold my finger on it forever, would be boring but still LOL :p MCH is about equally warm as the RAMS.

    In 2 hours IŽve been stable for ~9 hours running Orthos Small FFTs @ 1.281 bios setting, Cpu-Z showing 1.264 idle and 1.248 under load. Should I up the Vcore a notch anyway to add further stability or keep it at 1.281?
    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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    Default Re: Very strange behaviour after changing PC case and PSU

    Well I mean when you are running orthos blend or memtest, or RIGHT after. Not when idle

    Well the vcore is up to you, and what you feel is stable. 12+ hours is pretty stable I think, but sometimes I do a 24 hour test to be sure.

    And Blend is what you eventually want stable for sure though

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    Default Re: Very strange behaviour after changing PC case and PSU

    Oh... I am touching the MCH now and then, but at the small FFTs test, not when the whole computer is at idle. But u mean the small FFTs dont put any strain at all on the MCH?

    On the MCH there is some kinda metal-cover/sticker, the one that says Ultra Durable 2, I am guessing it needs to be removed right? Its in the way for the air blowing downwards...
    Last edited by LaZ; 07-02-2008 at 07:09 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

  7. #97
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    Default Re: Very strange behaviour after changing PC case and PSU

    NO, not much. The Blend test, or Memtest is what is going to make it hot.

    Ahh yeah I never thought of that on there. Maybe blowing downwards or upwards, you just want the air to flow thru the fins somehow. But sideways I dont think would work, up or down would be best

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    Default Re: Very strange behaviour after changing PC case and PSU

    Hmm ok, I guess IŽll see if the metal-cover is removeable, if its not IŽll see if I can mount the fan blowing upwards sucking the hot air away. I think I could fit a 60mm fan ontop of the MCH.

    Small FFTs stable for +9hrs now atleast, I will consider that stable enough and move onto the blend and memtest.
    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

  9. #99
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    Default Re: Very strange behaviour after changing PC case and PSU

    I dont think it is easily, maybe if you cut it up. I was looking at mine. A 400 MM would be fine, blowing upwards, even if only 50-60% of it was actually covering the bottom side of the sink. I think that would get plenty of air thru there.

    But yeah, whatever you can think up will likely be good

  10. #100
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    Default Re: Very strange behaviour after changing PC case and PSU

    New problems, I think I am gonna cry soon :| Orthos Small FFTs stable ~9-10 hours. Memtest No.2 and No.5 one hour each, no errors at all. BUT Orthos Blend fail after 40 seconds with a total system lockup :(

    Robust Graphics Booster___________ [Auto]
    CPU Clock Ratio ____________ [9]
    CPU Host Clock Control_ [Enabled]
    CPU Host Frequency (MHz)__________ [400]
    PCI Express Frequency (Mhz)_______ [100]
    C.I.A. 2__________________________ [Disabled]
    System Memory Multiplier (SPD)____ [2.00b] (800MHz)
    DRAM Timing Selectable_______ SPD __ [Manual]
    Performance Enhance = [Standard]

    CAS Latency Time________________ 5
    Dram RAS# to CAS# Delay_________5
    Dram RAS# Precharge Delay_______5
    Precharge Delay (tRAS)__________ 18
    ACT to ACT Delay (tRRD)_________ AUTO
    Rank Write to READ Delay________ AUTO
    Write to Precharge Delay_________ AUTO
    Refresh to ACT Delay______________ 42
    Read to Precharge Delay__________ AUTO
    Static tRead Value_______________ AUTO
    Static tRead Phase Adjust________ AUTO

    System Voltage Control____ [Manual]
    DDR2 OverVoltage Control__ [+0.300V]
    PCI-E OverVoltage Control_ [+0.1V]
    FSB OverVoltage Control___ [+0.1V]
    (G)MCH OverVoltage Control [+0.1V]
    CPU Voltage Control_______ [1.281]



    What could be wrong this time? Should I try the 4-4-4-12 with the subtimings I found stable before I overclocked the FSB?
    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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