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Thread: RAM timings on P55 UD6




  1. #1
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    Default RAM timings on P55 UD6

    Hi everybody!
    quite exited about the knowledge present on this forum.
    My question is the following:
    just bought a new system based on the P55-UD6, Intel i5 750 and Corsair ram modules p/n CMG4GX3M2A1600C7.
    I started with 2x2 GB RAM modules that I succeed to push up to 2200 MHz, having a nice 4Ghz system. Recently I bought 2 additional RAM modules (same kind) having a total of 4x2=8 GB installed. Here starts my issue. Initially the system would not boot, then loosening the timings made the system bootable. Actually I have the memory frequency set at 1760 MHz, higher frequencies will result in system failure (reboot and settings to safety value in BIOS). What are the BIOS settings I have to work with in order to increase the RAM frequency? I suppose I have to give more information, but I don't know exactly what, just ask me and I will provide them

  2. #2
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: RAM timings on P55 UD6

    8GB is just not going to run like that, maybe 1600 or so or a bit higher with looser timings, but no where near 2000Mhz.

    You would need a high QPI/Vtt and to increase your PCH a little, you may also need more Vdimm as well depending on how far you push things.

    If you do get BSOD's this should help you determin what you need to change
    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


    If you try things and have no luck, give me your full settings you are trying and I will advise back. Template to do so is in my signature

  3. #3
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    Default Re: RAM timings on P55 UD6

    Quote Originally Posted by Lsdmeasap View Post
    8GB is just not going to run like that, maybe 1600 or so or a bit higher with looser timings, but no where near 2000Mhz.

    You would need a high QPI/Vtt and to increase your PCH a little, you may also need more Vdimm as well depending on how far you push things.

    If you do get BSOD's this should help you determin what you need to change
    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


    If you try things and have no luck, give me your full settings you are trying and I will advise back. Template to do so is in my signature
    Hi!
    thank you very much for the useful information. Because I belong to the old school overclocker (Celeron 300 Mhz, do you remember?) I would like you to check my BIOS settings. Thank you in advance for the support you can give me.
    My system is so composed:

    Corsair Dominator-GT memory - 8 GB ( 4 x 2 GB ) - DIMM 240-pin - DDR3
    Intel X25-M G2 Mainstream Solid State Drive - 34nm Product Line - 160 GB
    WD VelociRaptor WD3000HLFS - HD - 300 GB - SATA-300
    Asus Radeon EAH5850/2DIS/1GD5 1GB
    Gigabyte GA-P55-UD6 - MB - ATX - iP55
    Intel Core i5 i5-750 / 2.66 GHz processor

    Here follows the template with my values:

    Advanced Frequency Settings:
    CPU Clock Ratio 18x
    Advanced Core Features [Press Enter]:
    Intel(R) Turbo Boost Tech................[Disabled]
    CPU Cores Enabled........................[All]
    CPU Multi-Threading......................NOT PRESENT
    CPU Enhanced Halt (C1E)..................[ Disabled]
    C3/C6/C7 State Support...................[Auto]
    CPU Thermal Monitor......................[Auto]
    CPU EIST Function........................[ Disabled]
    Bi-Directional PROCHOT...................[Auto]
    QPI Clock Ratio..........................[Auto]
    QPI Link Speed........................[x] 6.16 GHz
    Uncore Clock Ratio....................[16x]
    Uncore Frequency.........................3520MHz
    >>>>> Standard Clock Control <<<<<
    Base Clock (BCLK) Control................[Enabled]
    BCLK Frequency ..........................[220]
    Extreme Memory Profile (X.M.P.)..........[Disabled]
    System Memory Multiplier (SPD)...........[8]
    Memory Frequency (MHz)................1760
    PCI Express Frequency (MHz)..............[101]
    C.I.A.2..................................[Disabled]
    >>>>> Advanced Clock Control <<<<<
    CPU Clock Drive..........................[ 800mV]
    PCI Express Clock Drive..................[ 900mV]
    CPU Clock Skew...........................[ 0ps]
    Advanced Memory Settings:
    Extreme Memory Profile (X.M.P.)..........[Disabled]
    System Memory Multiplier (SPD)...........[8.0]
    Memory Frequency (MHz)................1760
    Performance Enhance (SPD)............. [Extreme]
    DRAM Timing Selectable (SPD)............ [Expert]
    Profile DDR Voltage .................. 1.5 (not editable)
    Profile QPI Voltage .................. 1.1 (not editable)
    Channel Interleaving.................. 6 [Auto]
    Rank Interleaving........................ 4 [Auto]
    >>>>> Channel A & B
    Channel A Timing Settings [Press Enter]:
    Cas Latency Time...................... 9 [Auto]
    tRCD.................................... 9 [ Auto]
    tRP..................................... 9 [ Auto]
    tRAS................................... 24 [ Auto]
    >>>>> Advanced Timing Control
    tRC................................... 34 [Auto]
    tRRD.................................. 5 [Auto]
    tWTR.................................. 5 [Auto]
    tWR.................................... 10 [Auto]
    tWTP.................................. 21 [Auto]
    tWL................................... 7 [Auto]
    tRFC.................................. 74 [Auto]
    tRTP.................................. 5 [Auto]
    tFAW................................... 25 [Auto]
    Command Rate (CMD).................. 2 [Auto]

    >>>>> Misc Timing Control
    B2B Cas Delay...................... --- [Auto]
    Round Trip Latency................. 60 (62 on channel B) [Auto]
    Channel A Turnaround Settings [Press Enter]:
    Different DIMMs....................... 6 [Auto]
    Different DIMMs....................... 5 [Auto]
    On The Same Rank...................... 1 [Auto]
    >>>>> Channel A Writes Followed By Writes
    Different DIMMs....................... 6 [Auto]
    Different DIMMs....................... 6 [Auto]
    On The Same Rank...................... 1 [Auto]
    Advanced Voltage Settings:
    ******Mother Board Voltage Control ******
    Voltage Types............Normal......Current
    --------------------------------------------
    >>> CPU
    Load Line Calibration...................[Standard]
    CPU Vcore..................1.19375v..[1.375]
    QPI/VTT Voltage..........1.100v.....[1.400v]

    >>> MCH/ICH
    PCH Core....................1.050v.....[Auto]
    CPU PLL......................1.800v.....[Auto]

    >>> DRAM
    DRAM Voltage..............1.500v.....[1.660v]
    DRAM Termination.........0.750v.....[Auto]
    Ch-A Data VRef............0.750v.....[Auto]
    Ch-A Data VRef............0.750v.....[Auto]
    Ch-B Data VRef............0.750v.....[Auto]
    Ch-B Data VRef............0.750v.....[Auto]

    Miscellaneous Settings:[/SIZE]
    Isochronous Support....................[Enabled]
    Virtualisation technology..............[Disabled]
    USB Storage Detect ....................[Disabled] Located In Integrated Peripherals Page NOT PRESENT

  4. #4
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: RAM timings on P55 UD6

    Yes, I remember overclocking back in the old school days! Much has changed eh :)

    For now I will advise you on the settings you gave, if you want to try higher freq let me know what you want to try and I will advise back

    Your high Bclk may be causing the issues, some CPU's just cannot run that speed 24/7. Just FYI for you to think about

    Advanced Frequency Settings:
    CPU Clock Ratio 18x
    Advanced Core Features [Press Enter]:
    Intel(R) Turbo Boost Tech................[Disabled]
    CPU Cores Enabled........................[All]
    CPU Multi-Threading......................NOT PRESENT
    CPU Enhanced Halt (C1E)..................[ Disabled]
    C3/C6/C7 State Support...................[Auto]
    CPU Thermal Monitor......................[Auto]
    CPU EIST Function........................[ Disabled]
    Bi-Directional PROCHOT...................[Auto]
    QPI Clock Ratio..........................[Auto] << Set lowest multi
    QPI Link Speed........................[x] 6.16 GHz
    Uncore Clock Ratio....................[16x]
    Uncore Frequency.........................3520MHz

    >>>>> Standard Clock Control <<<<<
    Base Clock (BCLK) Control................[Enabled]
    BCLK Frequency ..........................[220]
    Extreme Memory Profile (X.M.P.)..........[Disabled]
    System Memory Multiplier (SPD)...........[8]
    Memory Frequency (MHz)................1760
    PCI Express Frequency (MHz)..............[101]
    C.I.A.2..................................[Disabled]

    >>>>> Advanced Clock Control <<<<<
    CPU Clock Drive..........................[ 800mV]
    PCI Express Clock Drive..................[ 900mV]
    CPU Clock Skew...........................[ 0ps]

    Advanced Memory Settings:
    Extreme Memory Profile (X.M.P.)..........[Disabled]
    System Memory Multiplier (SPD)...........[8.0]
    Memory Frequency (MHz)................1760
    Performance Enhance (SPD)............. [Extreme] << Set Standard or Turbo for now, some have issues with Standard so you may want to try Turbo First. Extreme would be used/tried last after you get stable

    DRAM Timing Selectable (SPD)............ [Expert]
    Profile DDR Voltage .................. 1.5 (not editable)
    Profile QPI Voltage .................. 1.1 (not editable)
    Channel Interleaving.................. 6 [Auto]
    Rank Interleaving........................ 4 [Auto]

    >>>>> Channel A & B
    Channel A Timing Settings [Press Enter]:
    Cas Latency Time...................... 9 [Auto] << 8 should be ok
    tRCD.................................... 9 [ Auto] << 8 should be ok
    tRP..................................... 9 [ Auto] << 8 should be ok
    tRAS................................... 24 [ Auto] << Try 24 for now

    >>>>> Advanced Timing Control
    tRC................................... 34 [Auto]
    tRRD.................................. 5 [Auto]
    tWTR.................................. 5 [Auto]
    tWR.................................... 10 [Auto]
    tWTP.................................. 21 [Auto]
    tWL................................... 7 [Auto]
    tRFC.................................. 74 [Auto] << Set 88 for now
    tRTP.................................. 5 [Auto]
    tFAW................................... 25 [Auto]
    Command Rate (CMD).................. 2 [Auto] <<< Set 1T

    >>>>> Misc Timing Control
    B2B Cas Delay...................... --- [Auto]
    Round Trip Latency................. 60 (62 on channel B) [Auto]
    Channel A Turnaround Settings [Press Enter]:
    Different DIMMs....................... 6 [Auto]
    Different DIMMs....................... 5 [Auto]
    On The Same Rank...................... 1 [Auto]
    >>>>> Channel A Writes Followed By Writes
    Different DIMMs....................... 6 [Auto]
    Different DIMMs....................... 6 [Auto]
    On The Same Rank...................... 1 [Auto]
    Advanced Voltage Settings:
    ******Mother Board Voltage Control ******
    Voltage Types............Normal......Current
    --------------------------------------------
    >>> CPU
    Load Line Calibration...................[Standard]
    CPU Vcore..................1.19375v..[1.375] << May need more for 220 Bclk
    QPI/VTT Voltage..........1.100v.....[1.400v] << May need 1.35-1.5

    >>> MCH/ICH
    PCH Core....................1.050v.....[Auto] << May need 1.1-1.2
    CPU PLL......................1.800v.....[Auto]

    >>> DRAM
    DRAM Voltage..............1.500v.....[1.660v]
    DRAM Termination.........0.750v.....[Auto]
    Ch-A Data VRef............0.750v.....[Auto]
    Ch-A Data VRef............0.750v.....[Auto]
    Ch-B Data VRef............0.750v.....[Auto]
    Ch-B Data VRef............0.750v.....[Auto]

    Miscellaneous Settings:[/SIZE]
    Isochronous Support....................[Enabled]
    Virtualisation technology..............[Disabled] << Do you use this? If not disable it
    USB Storage Detect ....................[Disabled] Located In Integrated Peripherals Page NOT PRESENT << This is there, somewhere or it's name may be different. You should find USB legacy or storage detect. It only needs disabled for troubleshooting though really so you are fine if you cannot find it.

  5. #5
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    Default Re: RAM timings on P55 UD6

    Thank you SOOO much for the advices... I will try them asap and I will let you know. I am basically satisfied with my system, but my overclocker nature is keeping me pushing my pc to the extreme. By the way, I dont know why my system sometimes reboot very quickly but it can happen that it takes almost minutes...maybe because I set the memory timings to auto?

  6. #6
    Lsdmeasap's Avatar
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    Default Re: RAM timings on P55 UD6

    Ya, Auto can do some funny things sometimes.

    Let us know how your testing goes with this.

  7. #7
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    Default Re: RAM timings on P55 UD6

    Ok,
    I changed the settings as you suggested. The system will boot with the memory settings but the command rate will not be changed (2T instead of 1T); I checked it with CPUIZ. The memory bandwidth is unchanged (around 22GHz in Sisoft Sandra) but the latency has been improved somewhat (56 ns now). Regarding the USB legacy, I found USB legacy function and USB storage function, I disabled both but I suppose that maybe something can be wrong if I would like to enter and modify BIOS settings if I have no access to my wireless USB keyboard & mouse, isn't it? If so I can reenable it? CMOS reset?

  8. #8
    Lsdmeasap's Avatar
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    Default Re: RAM timings on P55 UD6

    CPU-z may not properly show the command rate.

    Use Memset and see what it says
    Tweakers.fr

    Or everest ultimate

    You only need to disable Legacy USB, and really only if you are having issues.

    Yes sounds like you will need to clear your CMOS, or plug in a PS/2 mouse to access the BIOS and change that USB setting back

  9. #9
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    Default Re: RAM timings on P55 UD6

    I checked with Everest (memset doesn't support i5, strange?) and also there command rate 2T is shown. Maybe the setting is too tight for the frequency (1760 Mhz) so 1T is discarded.
    My strange looong boot-up sequence disappeared after changing the USB legacy options in BIOS, now the system is up and runs in less than a minute (keep in mind my Intel SSD disk). Regarding BIOS, I can access it, just hit DEL during boot-up and I can navigate through the options.....
    By the way, the reason why of my high BCLK is to push memory frequency, I should had preferred a 1:1 and 200 BCLK

  10. #10
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    Default Re: RAM timings on P55 UD6

    Quote Originally Posted by globetrotter1969 View Post
    Hi everybody!
    quite exited about the knowledge present on this forum.
    My question is the following:
    just bought a new system based on the P55-UD6, Intel i5 750 and Corsair ram modules p/n CMG4GX3M2A1600C7.
    I started with 2x2 GB RAM modules that I succeed to push up to 2200 MHz, having a nice 4Ghz system. Recently I bought 2 additional RAM modules (same kind) having a total of 4x2=8 GB installed. Here starts my issue. Initially the system would not boot, then loosening the timings made the system bootable. Actually I have the memory frequency set at 1760 MHz, higher frequencies will result in system failure (reboot and settings to safety value in BIOS). What are the BIOS settings I have to work with in order to increase the RAM frequency? I suppose I have to give more information, but I don't know exactly what, just ask me and I will provide them

    Hello !

    I have the same MB and my current Corsair 2*2Gb CM3X2048-1600C7DHX designed to run under 1600MHz for 1.9V can only run under 1080MHz for 1.65V (it is not present on http://www.gigabyte.com.tw/FileList/...ga-p55-ud6.pdf).
    I'm looking for new RAM modules which are more compatible with P55-UD6, and your RAM is very interesting, even it seems not to be officially compatible. Can you tell me your BIOS version ?

    Thanks !

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