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Thread: Memory Timings Explained W/ Suggested Timings & Memset VS. BIOS




  1. #121
    Lsdmeasap's Avatar
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    Default Re: Memory Timings Explained W/ Suggested Timings & Memset VS. BIOS

    Well there is many changes from DDR2 to the DDR3 architecture, so most of this will not apply when it comes to DDR3. The names of some of the settings are the same of course but timings and such mentioned here do not apply really.

  2. #122
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    Thumbs up Re: Memory Timings Explained W/ Suggested Timings & Memset VS. BIOS

    Great work on this guide Lsdmeasap!

    It brought me back to TT for the first time in ages.

    Attemping to get my EP45-UD3P beyond Q9550 @ 4.4Ghz

    May require some DDR2 PC2-10400 1300MHz, my Mushkin 996580 doesn't seem capable.
    Happiness isn't something you experience; it's something you recall.

  3. #123
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    Default Re: Memory Timings Explained W/ Suggested Timings & Memset VS. BIOS

    Quote Originally Posted by Lsdmeasap View Post
    Memtest86+ is a fine indicator of Memory stability only, if you are failing Prime but passing memtest then you likely have other issues such as voltages (CPU or QPI/Vtt or NB) too low or something along those lines
    Is it possible the other way around though? I played with timings a little with my current FSB of 500 and Memtest passes, but custom test in Prime95 (a bit more hardcore Blend I guess) fails. Is it possible that raising the timings values might help to get stable instead of increasing MCH core voltage? (in fact I lowered that before as well)

  4. #124
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    Default Re: Memory Timings Explained W/ Suggested Timings & Memset VS. BIOS

    Quote Originally Posted by dryadsoul View Post
    Great work on this guide Lsdmeasap!

    It brought me back to TT for the first time in ages.

    Attemping to get my EP45-UD3P beyond Q9550 @ 4.4Ghz

    May require some DDR2 PC2-10400 1300MHz, my Mushkin 996580 doesn't seem capable.
    Hmm, ya you may need faster ram or are you not using the lower multi's? I have ran my 996580's up to 1200Mhz, are you using 555 timings? May have to try 555-20 or 655-18/20 for 1300? Maybe 666 timings?

    Quote Originally Posted by Octopuss View Post
    Is it possible the other way around though? I played with timings a little with my current FSB of 500 and Memtest passes, but custom test in Prime95 (a bit more hardcore Blend I guess) fails. Is it possible that raising the timings values might help to get stable instead of increasing MCH core voltage? (in fact I lowered that before as well)
    Either could help really, just depends I suppose. More MCH, More Ram voltage, cooler ram, or looser main/sub timings would help you get more anytime.

  5. #125
    Chike is offline Senior Member
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    Default Re: Memory Timings Explained W/ Suggested Timings & Memset VS. BIOS

    Hi,

    The suggested timings for tWTR are (4-6) 9-11, and tRD (5/6) 7-10, while the values in parenthesis said to be for benchmarking only (I assume not everyday use.)

    As default my motherboard sets tWTR 4/3 and tRD 4-6 depending on which of 2 pairs I have I use, and DRAM Prformece/X.M.S settings.

    Does that make any sence?

    In general the motherbord works well, but it didn't pass stress with default settings, so I am playing with tRD value now to see if this is the problem.
    Last edited by Chike; 07-03-2009 at 10:31 PM.

  6. #126
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    Default Re: Memory Timings Explained W/ Suggested Timings & Memset VS. BIOS

    This is a great post. Thanks Lsdmeasap
    http://forums.tweaktown.com/gigabyte...ench-test.html
    http://www.gigabyte-usa.com/FileList...ios_qflash.pdf
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    Default Re: Memory Timings Explained W/ Suggested Timings & Memset VS. BIOS

    I was wondering if its better to try and reduce your trfc vs tras?

    Im using OCZ2P1066LV4GK, e7400, and ud3p, below are my settings stable on memtest and prime95:

    9x430
    2.66D
    5-5-5-15-52 (everything else on auto)

    LLC Enabled
    1.35v
    1.26v
    1.57v
    0.823v

    1.2v
    0.738v
    0.94v
    1.5v
    Auto

    1.9v

  8. #128
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    Default Re: Memory Timings Explained W/ Suggested Timings & Memset VS. BIOS

    Hi.
    Im Joe from Perú, a latin guy new here. Sorry my english.
    I bought a month ago a Gigabyte G13M-ES2L Mainboard and a
    2gb OCZ DDR2 PC2-6400 Vista Performance Gold.
    All works fine. I could install without problems Windows XP SP3, Windows7 RC 64bits and OSX Leopard, hackintosh version 10.5.7

    But now, I added another 2gb ram, of course identical, to have 4gb in dual
    channel. Then I experienced blue screens, reboots and programs errors.
    I contacted OCZ Support guy, and told me to increase the ATC Delay to 64 and the Northbridge Voltage to 1.35v.

    Well, I found in bios, with Ctrl+F1, the ATC Delay, but not the way to change the Northbridge Voltage. I read this thread looking for some help, but I saw another bios examples, not mine.

    In my Bios Sistem Voltage Control, I have :

    DDR2 OverVoltage Control : Normal
    FSB OverVoltage Control : Normal
    FSB DeOverVoltage Control : Normal
    CPU GTLREFVolatge Ratio : 0.67
    CPU Voltage : Normal

    Thanks if you can read and post some comments about this.
    I'll be very gratefull.

    Best Regards
    Joesoft
    Gigabyte G31M-ES2L
    2x2gb OCZ DDR2 PC2-6400 Vista Performance Gold
    Intel Core2Duo E7500
    Seagate Barracuda 320gb SATAII
    HEC 370watts Micro ATX 6TJB
    Hackintosh, Windows XP SP3, Windows 7RC 64bits


  9. #129
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    Default Re: Memory Timings Explained W/ Suggested Timings & Memset VS. BIOS

    Sorry Joesoft Since you do not have (G)MCH Voltage control (= Northbridge Voltage Control) you may always have issues with more than 2GB of ram because you cannot raise that.
    You could try this.
    DDR2 OverVoltage Control : Normal change to manual set to +0.2-+0.3
    FSB OverVoltage Control : (= vtt) Normal change to manual set to Set +0.1-0.2 for stability
    FSB DeOverVoltage Control : Normal
    CPU GTLREFVolatge Ratio : 0.67
    CPU Voltage : Normal

    Let us know if that helps.
    http://forums.tweaktown.com/gigabyte...ench-test.html
    http://www.gigabyte-usa.com/FileList...ios_qflash.pdf
    Phenom II 945 @ 3.2Ghz w/Thermaltake Big Typhoon Pro 14 CPU Cooler
    Gigabyte GA-MA78GM-S2H rev.1.1 F11
    Sapphire 3870HD / 100225L / 512MB / ddr4
    4GB / Kingston / KHX8500D2K2/2GN / 5-5-5-18 / 1066Mhz
    (2) WD Caviar / WD2500AAKS/ 250GB in SATA RAID-0
    (1) WD Caviar / WD2500AAKS/ 250GB in SATA AHCI
    (2) IDE's 1 8XdualDVDRW 1 52x32x52x CDRW
    Antec /Neo HE550 / 550W
    Mid size ATX case with show through panel
    2) 80x80 front fans (1) 120x120 rear fan and small nb fan
    Microsoft comfort curve USB keyboard 2000 ver.1.0
    Logitech G500 USB mouse
    Monitor: CMV937A
    7.1+2 Channel High Definition ALC889A
    Dual boot Windows 7 32bit home & Windows 7 64bit home


  10. #130
    Lsdmeasap's Avatar
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    Default Re: Memory Timings Explained W/ Suggested Timings & Memset VS. BIOS

    Quote Originally Posted by Chike View Post
    Hi,

    The suggested timings for tWTR are (4-6) 9-11, and tRD (5/6) 7-10, while the values in parenthesis said to be for benchmarking only (I assume not everyday use.)

    As default my motherboard sets tWTR 4/3 and tRD 4-6 depending on which of 2 pairs I have I use, and DRAM Prformece/X.M.S settings.

    Does that make any sence?

    In general the motherbord works well, but it didn't pass stress with default settings, so I am playing with tRD value now to see if this is the problem.
    The values in parentheses are what you want to work down to, to get stable. Not just for benching but everyday use, depending on the setup of course

    If you need help please make a thread with your full specs and settings and someone or myself can help you out a little.

    Quote Originally Posted by osme02 View Post
    I was wondering if its better to try and reduce your trfc vs tras?

    Im using OCZ2P1066LV4GK, e7400, and ud3p, below are my settings stable on memtest and prime95:

    9x430
    2.66D
    5-5-5-15-52 (everything else on auto)

    LLC Enabled
    1.35v
    1.26v
    1.57v
    0.823v

    1.2v
    0.738v
    0.94v
    1.5v
    Auto

    1.9v
    See PM

    Quote Originally Posted by Joesoft View Post
    Hi.
    Im Joe from Perú, a latin guy new here. Sorry my english.
    I bought a month ago a Gigabyte G13M-ES2L Mainboard and a
    2gb OCZ DDR2 PC2-6400 Vista Performance Gold.
    All works fine. I could install without problems Windows XP SP3, Windows7 RC 64bits and OSX Leopard, hackintosh version 10.5.7

    But now, I added another 2gb ram, of course identical, to have 4gb in dual
    channel. Then I experienced blue screens, reboots and programs errors.
    I contacted OCZ Support guy, and told me to increase the ATC Delay to 64 and the Northbridge Voltage to 1.35v.

    Well, I found in bios, with Ctrl+F1, the ATC Delay, but not the way to change the Northbridge Voltage. I read this thread looking for some help, but I saw another bios examples, not mine.

    In my Bios Sistem Voltage Control, I have :

    DDR2 OverVoltage Control : Normal
    FSB OverVoltage Control : Normal
    FSB DeOverVoltage Control : Normal
    CPU GTLREFVolatge Ratio : 0.67
    CPU Voltage : Normal

    Thanks if you can read and post some comments about this.
    I'll be very gratefull.

    Best Regards
    See below

    Quote Originally Posted by artdrivers View Post
    Sorry Joesoft Since you do not have (G)MCH Voltage control (= Northbridge Voltage Control) you may always have issues with more than 2GB of ram because you cannot raise that.
    You could try this.
    DDR2 OverVoltage Control : Normal change to manual set to +0.2-+0.3
    FSB OverVoltage Control : (= vtt) Normal change to manual set to Set +0.1-0.2 for stability
    FSB DeOverVoltage Control : Normal
    CPU GTLREFVolatge Ratio : 0.67
    CPU Voltage : Normal

    Let us know if that helps.
    I agree with artdrivers, you may have a tough time with 3-4GB+ without being able to adjust the NB Voltage on that board.

    Which setting are you increasing, that you called ATC Setting? Juist wanted to be sure, you should/may need to increase tRFC (Refresh To Act Delay). Just wondered if we are talking about the same setting here or not.

    As said above you will of course need to also set your ram voltage to the spec amount you see on your ram's product page or the ram sticker itself. You can try lower later, but may not have much luck due to the lack of NB Voltage adjustments.

    +0.3V = 2.1V
    +0.2V = 2.0V

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