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Thread: Seeing different values for Vcore within BIOS




  1. #1
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    Default Seeing different values for Vcore within BIOS

    Hi all,

    I just built a new system with the specs at the bottom. From the start, I noticed that when I pressed the power button, the system would start for 1-2sec before shutting back down for another 1-2 sec, followed by finally starting up. Sometimes it will do this cycle a few times before finally starting all the way up. (note, different issue)

    I've ignored this, and now that I'm starting to overclock a bit, I'm noticing a few confusing readings from within the BIOS. Within the PC Health section, there are voltage measurements for Vcore and Vmem, but these are different than those within the Tweaker section. Further, these voltages are up to 0.1V lower than what I'm specifying in the voltage settings. Within the PC Health section, the PSU rails all seem very stable, but the Vcore first digit seems to flicker every now and then... very unsettling.

    Thoughts? should I RMA?



    X58A-UD3R (rev. 2.0)
    Intel i7 950
    12GB (3x 4GB G-Skill 1600 DDR3) Ram
    MSI 580GTX

  2. #2
    Chike is offline Senior Member
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    Default Re: Seeing different values for Vcore within BIOS

    Do you get an error warning when you enter BIOS M.I.T?
    0.1v difference is way too much for memory voltage and idle vcore.

  3. #3
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    Default Re: Seeing different values for Vcore within BIOS

    I do whenever the system does that on-off thing, warning me about overclocking settings... but it was doing that before I even started overclocking.

  4. #4
    Chike is offline Senior Member
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    Default Re: Seeing different values for Vcore within BIOS

    In that case actual values may differ from what you see in BIOS, it's in the warning too.
    Stabilize your system at stock clock before you begin overclocking.
    With 12GB memory I believe you need more QPI/Vtt however I do not know how much, wait for someone that does.
    Please fill you forum signature with full system specs including a link to ram specs or at least model/part number.

  5. #5
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    Default Re: Seeing different values for Vcore within BIOS

    Just reset the BIOS to fail-safe and changed from there, no overclock. I realized that I was not using the XMP memory profile before, and once I switched to that, everything seems to be working much better. I also upped the QPI/Vtt voltage one level. I will be running a few tests to see how stable it is.

    Here's a link to the memory: Newegg.com - G.SKILL Ripjaws Series 12GB (3 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL9T-12GBRL

  6. #6
    Acebmxer's Avatar
    Acebmxer is offline Gigabyte Elite
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    Default Re: Seeing different values for Vcore within BIOS

    Quote Originally Posted by mjs454 View Post
    Just reset the BIOS to fail-safe and changed from there,
    Go back to bios and select Load Optimized defaults. It is suggested you start from those settings and not Fail-Safe settings.
    Press F10 save and reboot renter bios and make these changes.

    Key rules uncore needs to be memory multi x 2 (+1 or +2)
    Qpi/vtt needs to be no less then 0.5v less then vdimm. (if 1.65v is needed for ram qpi/vtt can not be less then 1.15v)

    For 12gb ram I would suggest starting at 1.3-1.4v at stock settings. Set vcore to normal LLC to level 1 and dvid to +0.00000

    Memory Multi set to 12x uncore 24x, (25x,26x) <---- you can try these but may require alot of qpi/vtt to get stable try 10x memory and 20x-22x uncore for 1333mhz ram speed.
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  7. #7
    Chike is offline Senior Member
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    Default Re: Seeing different values for Vcore within BIOS

    If you Disable XMP you will run DDR-1333 or DDR-1066, You can check with CPU-Z Memory tab, DRAM Frequency would be half (e.g. 666 for DDR-1333).
    What QPI/Vtt was used with the XMP?

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    Default Re: Seeing different values for Vcore within BIOS

    thanks a lot Acebmxer, that was what I really needed. I've got it stable (I think... full load 1 hr, no issues so far) at 4GHz and slightly oc'ed GPU as well. I've attached screenshots... let me know if all looks well.
    Thanks everyone for gettin me pointed in the right direction!

    Seeing different values for Vcore within BIOS-capture3-jpg

  9. #9
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    Default Re: Seeing different values for Vcore within BIOS

    tried command rate 1T? for ram?
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  10. #10
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    Default Re: Seeing different values for Vcore within BIOS

    no... should I? I was big into overclocking with the original P4's, but so much has changed since then... I don't know much about all the memory timings. I'll give it a try later tonight after I test this further. I know these modules can do more than what they're at now though (stock settings as far as I can tell).

    Any other advice would help too. There were a lot of voltage settings I saw that I just left at auto...

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