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Thread: Does Vcore affect RAM?




  1. #1
    Join Date
    Aug 2010
    Location
    CT
    Posts
    4

    Default Does Vcore affect RAM?

    I've been O/C'ing my new rig for 2 weeks and this is what I think I have learned, please correct me if I'm wrong.

    Prime95 errors come mainly from underclocked Vcore's and crashes and BSOD are from RAM settings. I believe that is what I read and I can overclock my CPU to over 4Mhz and underclock my RAM and be stable for 24 hours running Prime but start messing with my RAM and I see BSOD and crashes.

    Raise my BLCK over 174 with an SPD of 8 (or higher) and my rig won't boot. I've tried everything I can think of or been suggested and I just think my RAM won't do it, or my MB won't let it try.

    So I dropped my CPU multi down to 19 ( no luck with anything lower) to go with my 6 SPD to get the most memory freq for the buck and set BLCK at 191. QPI is at 36, do you ever use anything else? Uncore is at 17, I read your suppose to double SPD or double plus one 1 but I can get it stable at 17, anything lower would just lower performance. Haven't tried anything because I doubt I could and even if I could I doubt the performance increase would be worth the effort.

    Best timing I think will prove to be stable are 9-8-8-19. Thought I had 8-8-8-18 but crashed. I read i7 930 Bloomfield doesn't recognize 1333 RAM, sees it as 1066. Is it true?

    So I think my O/C is done once I am sure my timings are stable. Pretty satisfied with my result if a little disappointed I didn't buy better RAM. I stress with Prime 95 and MemTest86 at the same time and bench my RAM with MaxxMEM to see what timings are better.

    I can get a stable O/C of my CPU with a 1.26250 Vcore but will run it at 1.275 just because. My high temp with Prime running is around 80c, wouldn't feel comfortable with anything higher. So I guess I'm done if somebody could just confirm my conclusions. One last question, does Vcore affect RAM. Becuase if it does I guess I have to get better thermal paste than the stuff that came with my Zalman cooler and get another fan and try for 4.2.

    i7 930
    Gigabyte GA-X58A-UD3R
    Radeon HD 5970
    SAMSUNG Spinpoint F3 HD103SJ 1TB 7200 RPM 32MB Cache
    Windows 7 64 Bit
    Crucial 6GB (2x3) DDR3 PC3-10600 CT3KIT25664BA1339
    ZALMAN CNPS10X Performa 120mm Long life CPU Cooler
    Thermaltake Toughpower XT TPX-775M 775W ATX 12V v2.3 / EPS 12V v2.9

    Advanced CPU Features:
    CPU Clock Ratio ................................ [19x]
    Intel® Turbo Boost Tech .................. [Disabled]
    CPU Cores Enabled ............................ [All]
    CPU Multi Threading .......................... [Enabled]
    CPU Enhanced Halt (C1E) ................... [Disabled]
    C3/C6/C7 State Support .................... [Disabled]
    CPU Thermal Monitor ......................... [Enabled]
    CPU EIST Function ............................ [Disabled]
    Virtualization Technology ................... [Disabled]
    Bi-Directional PROCHOT ..................... [Enabled]

    Uncore & QPI Features:
    QPI Link Speed .............................. [Auto=36]
    Uncore Frequency .......................... [17x]
    Isonchronous Frequency ..................[Enabled]

    Standard Clock Control:
    Base Clock (BCLK) Control ................ [Enabled]
    BCLK Frequency (MHz) .....................[191]
    PCI Express Frequency (MHz) ........... [103]

    C.I.A.2 [Disabled] Not sure what this is

    Advanced Clock Control:
    CPU Clock Drive ..............................[700mV]
    PCI Express Clock Drive ................... [700mV]
    CPU Clock Skew ............................. [0ps]
    IOH Clock Skew ............................. [0ps]

    Advanced DRAM Features:
    Performance Enhance ...................... [Standard]
    Extreme Memory Profile (X.M.P) ......... [Disabled]
    System Memory Multiplier (SPD) ........ [6x]
    DRAM Timing Selectable (SPD) .......... [Quick]

    Channel A + B + C

    Channel A Timing Settings:
    ##Channel A Standard Timing Control##
    CAS Latency Time ......................[9]
    tRCD .......................................[8]
    tRP .........................................[8]
    tRAS .......................................[19]

    ##Channel A Advanced Timing Control##
    tRC ........................................ [Auto]
    tRRD .......................................[Auto]
    tWTR ...................................... [Auto]
    tWR ........................................[Auto]
    tWTP .......................................[Auto]
    tWL ........................................[Auto]
    tRFC .......................................[Auto]
    tRTP .......................................[Auto]
    tFAW .....................................[Auto]
    Command Rate (CMD) ................[1]

    ##Channel A Misc Timing Control##
    Round Trip Latency ...................[Auto]
    B2B CAS Delay ..........................[Auto]

    Advanced Voltage Control:

    CPU
    Load Line Calibration ................. [Level 1]
    CPU Vcore ...............................[1.275]
    QPI/VTT Voltage 1.150v ............[1.34]
    CPU PLL 1.800v .......................[1.88]

    MCH/ICH
    PCIE 1.500v ...........................[1.5]
    QPI PLL 1.100v .......................[1.2]
    IOH Core 1.100v .....................[1.2]
    ICH I/O 1.500v .......................[1.5]
    ICH Core 1.1v ........................[1.2]

    DRAM
    DRAM Voltage ..............[1.66]
    DRAM Termination 0.750v [.82]
    Ch-A Data VRef. 0.750v [.82]
    Ch-B Data VRef. 0.750v [.82]
    Ch-C Data VRef. 0.750v [.82]
    Ch-A Address VRef. 0.750v [.82]
    Ch-B Address VRef. 0.750v [.82]
    Ch-C Address VRef. 0.750v [.82]

  2. #2
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
    Join Date
    Jan 2008
    Location
    PCB Island
    Posts
    25,940

    Default Re: Does Vcore affect RAM?

    Vcore doesn't affect memory, but your thoughts on BSOD's and crashes are kind of wrong. You can BSOD or crash with any incorrect setting ot voltage (too high or low)

    Here are some key X58 BSOD's and their causes

    BSOD Error codes and what they mean:
    0X00000050 << Incorrect Memory Timing/Freq or Uncore Multi
    0X00000124 << Incorrect QPI/Vtt Voltage (To Much/Not Enough)
    0X00000101 << Not enough Vcore Voltage
    0X00000109 << Not enough or too Much memory voltage
    JEDEC spec for DDR3 is 1066, so that is what all CPU's will see all DDR3 memory as until the user adjusts things.

    Can you please tell me what BIOS you are using? What Bclk do you want to run? Let me know and I will advise back a full list of settings for you to try

    I do see you are starting with Fail Safe BIOS settings, this may be part of your issues, you should start with Optimized Defaults.

    You should also probably use less IOH (Like Auto or 1.14), and all those memory vref's should be on auto.

    Uncore should be 2x ram multiplier, or 1-2 above is normally ok/better. QPI freq, you can use any multi you want, depending on Bclk, you just need to keep it under 8.0Gt/s.

    I also advise you use Expert for your memory, and set each channel one at a time. That way if you have a failing channel you will see it, failed channels timings will show up as N/a or -

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