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Thread: superPI crash on 32M calc




  1. #1

    Default superPI crash on 32M calc

    as the title states, my system can't seem to get through a pi 32m fully and its really bothering me.
    Specs in sig.
    I can blend test it for as long as i like without trouble but for some reason superpi will just stop responding about 10 - 15 minutes into a 32M calculation.

    My ram is force cooled and has no addressing errors, ive shown my bios config on the forums in a few areas and initially put it down to having Vista 64bit, but I dont think thats the issue now.

    Is there something I should raise which can help, I know my systems stable, but without superPI working properly It leaves me thinking I can get better stability out of it.

    My bios:
    Code:
    CPU Clock ratio = 20
    Advanced CPU Features:
    CPU Clock ratio = 20
    Turbo = Disabled
    Cores Enabled = All
    Multi-Threading = Enabled
    Advanced halt [C1E] = Disabled 
    C3/C6/C7: Disabled 
    Thermal monitor = Disabled
    CPU EIST Function = Disabled
    Virtualisation = Enabled
    BI-Directional PROCHOT = Enabled
    QPI Link Speed = Auto
    UnCore/QPI Features:
    QPI Link Speed = Auto
    UnCore Frequency = 20
    Isochronous Support = Enabled
    Base Clock Frequency (BCLK) Control = Enabled
    Frequency = 133
    
    Peformance enhance = Standard 
    System Memory Multiplier = 10
    
    DRAM Timing Selectable (SPD)
    CAS = 7
    TRCD = 7
    TRP = 7
    TRAS = 20
    Command rate CMD = 1
    
    Dram voltage at 1.58 
    All other volts set to [Normal]
    Last edited by qwertylesh; 09-07-2009 at 02:45 PM.
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  2. #2
    Lsdmeasap's Avatar
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    Default Re: superPI crash on 32M calc

    Please give us your settings so we can see what you are using, link in my signature for template

  3. #3
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    Default Re: superPI crash on 32M calc

    I was having the same problems when i went from 3gb to 6 ,gb prime95 would error with the 6gb sticks ... i eventually got it to complete by upping QPI\VTT to 1.24v and Dramm to 1.64v -1.66v.
    Gigabyte EX58-UD4P rev 1.0
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  4. #4
    Lsdmeasap's Avatar
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    Default Re: superPI crash on 32M calc

    Please do not use Normal, use Auto or set your own amount.

    You may need 1.3-1.4+ QPI/Vtt, and 1.64-1.66 Vdimm as stated above, depending on your uncore clocks and ram timings which look like you may need them set in those ranges. I also advise you set IOH to 1.18-1.24

    Just so you know, CPU multi of x20 can be unstable for some CPU's, so you may need to use 19 or 21

  5. #5

    Default Re: superPI crash on 32M calc

    1.58 is definitely the right ram voltage for this ram kit at PC3-10666, I'm absolutely certain it doesn't need more or less then that (either direction = bsod's).

    Any particular reason Normal is no good? I figured this would lock it to the most default/stock voltages, being better for longevity? :\

    I will find out the stock VTT value and raise it by .01 a few times and see if it will PI successfully after that.

    Will do the same for the IOH when Im home tonight, and see if it helps. :)

    thanks guys.


    edit: why would the stock 20x be unstable, that can't be right, I dont want to OC or UC this I just want it the most stable all at stock.
    Gaming: GIGABYTE X58-UD5 - i7 920 C0 - Noctua NH-U12P - 6GB OCZ Platinum PC3-10666 CL7 - Sapphire HD5870 - Antec P182 - TruePower Trio 650w - 3 Acer X243HB in Eyefinity - 2 x 500GB ST3500320AS 7200.11, SD1A - MS Digital Media KB - Windows 7 Ultimate x64

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  6. #6
    Lsdmeasap's Avatar
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    Default Re: superPI crash on 32M calc

    Yes, normal may not be enough please use auto or set manually

    Sorry about the Ram voltage, you are likely right, but they are rated to 1.65 I just assumed it was 1600Mhz I think.

    Stock Vtt may be fine at 1333Mhz though, but since you have raised your uncore you may need more Vdimm and QPI/Vtt to compensate for the higher uncore

    x20 CPU multi has been known to cause issues with certain CPU's. Not only x20, just even numbers in itself, same applies with odd values for uncore, some CPU's don't like it and some CPU's don't care about either one of those so it just all depends on what your CPU Likes. Just thought I would mention it is all, no biggie right now I dont think.

  7. #7

    Default Re: superPI crash on 32M calc

    My cpu can pass 90 linpack without any residual norm descripency, this is with 6gb (so it takes a long time) i believe the instability lies with the voltage on the memory controller and/or uncore.
    Gaming: GIGABYTE X58-UD5 - i7 920 C0 - Noctua NH-U12P - 6GB OCZ Platinum PC3-10666 CL7 - Sapphire HD5870 - Antec P182 - TruePower Trio 650w - 3 Acer X243HB in Eyefinity - 2 x 500GB ST3500320AS 7200.11, SD1A - MS Digital Media KB - Windows 7 Ultimate x64

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  8. #8
    Lsdmeasap's Avatar
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    Default Re: superPI crash on 32M calc

    90 passes on linpack is killing your CPU, please stop, 10-20 is plenty

    But yes, you are correct, like I said you may need to adjust things on the QPI/Vtt and Uncore side of things

  9. #9

    Default Re: superPI crash on 32M calc

    OK, heres what ive tried so far:
    All volatages (apart from dram volt) on auto, still crashes.
    Ive tried Uncore at x21, and upped the ICH and two IOH by an aditional (point) value each. Also upped the QPI PLL voltage by one (point) value.

    Will try upping VTT by a (point) value now.

    Could it be the DRAM termination voltage at 0.750 doing it?

    edit: ok, now trying 1.3QPI/VTT and 1.18 IOH.

    edit2: still no love.
    Im wandering if its an addressing problem, SuperPi reports my available and available Real memory are both -1
    and the kind of crash it is, is an Access Denied from trying to write to memory it shouldn't.

    Would insufficient voltages really cause this?

    edit3: set the ICH I/O and Core back to Auto, set the QPI PLL back to auto, upped the QPI/Vtt to 1.315v and bumped the IOH core to 1.200, testing now.

    About the raising the uncore, I raised to to 20/21x for stability, as i read to run 1333mhz DDR if the Auto setting doesnt increase the uncore sufficiently you need to do it yourself, hopefully I can find a safe and stable voltage setting which will make my system all the more stable then it already is.
    Last edited by qwertylesh; 09-07-2009 at 11:32 PM.
    Gaming: GIGABYTE X58-UD5 - i7 920 C0 - Noctua NH-U12P - 6GB OCZ Platinum PC3-10666 CL7 - Sapphire HD5870 - Antec P182 - TruePower Trio 650w - 3 Acer X243HB in Eyefinity - 2 x 500GB ST3500320AS 7200.11, SD1A - MS Digital Media KB - Windows 7 Ultimate x64

    Server: - HP Proliant MicroServer N36L - 4GB Team 1333 CL9 - 1x 160 2.5 5400RPM - 2x 500GB ST3500320AS 7200.11, SD1A - 1x 250GB ST3500320AS 7200.12 - 1x 1.5TB ST3500320AS 7200.12

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  10. #10

    Default Re: superPI crash on 32M calc

    OK, it still crashes. :\

    What I will do, ive ran out of time tonight to keep testing it.
    but for now i'll set all volts apart from dram back to auto.
    Tomorrow night I will try changing the command rate to 2T
    and loosening the ram timings.
    If it still wont run I can try higher QPI/VTT and ICH voltages.
    Gaming: GIGABYTE X58-UD5 - i7 920 C0 - Noctua NH-U12P - 6GB OCZ Platinum PC3-10666 CL7 - Sapphire HD5870 - Antec P182 - TruePower Trio 650w - 3 Acer X243HB in Eyefinity - 2 x 500GB ST3500320AS 7200.11, SD1A - MS Digital Media KB - Windows 7 Ultimate x64

    Server: - HP Proliant MicroServer N36L - 4GB Team 1333 CL9 - 1x 160 2.5 5400RPM - 2x 500GB ST3500320AS 7200.11, SD1A - 1x 250GB ST3500320AS 7200.12 - 1x 1.5TB ST3500320AS 7200.12

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    : GIGABYTE 945GCMX-S2 - E6320 - 2GB Corsair DHX 800 C5 - GIGABYTE 7600GT - Antec Fusion - Windows 7 Ultimate x64


    HTPC3:
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