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Thread: Advice needed for ram configuration




  1. #1
    Join Date
    Oct 2008
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    Question Advice needed for ram configuration

    Hi
    I need some advice in configuring a new pair of DDR3 sticks.
    I'm posting here before i put the ram in my pc because i want to try to avoid any incompatibilities.
    Here's the story.
    My system is this:

    Motherboard GA-EP45T-DS3R (BIOS F2)
    CPU E8400
    Graphics Sapphire Radeon HD 4670
    RAM 2x1 GB Geil 1333 timings 7-7-7-24
    PSU Corsair HX620 watt
    HD Western Digital 250 GB sata
    DVD NEC sata

    I had a hard time configuring the timings and voltages in order to have it run smooth and stable and in the end thanks to the help of Lsdmeasap all went right.
    If you want the background story is here

    The current bios configuration is this:

    Robust Graphics Booster ...............: Auto
    CPU Clock Ratio ..........................: 9x
    Fine CPU Clock Ratio.....................:0.0
    CPU Frequency ...........................: 3Ghz (333x9)


    Clock Chip Control
    Standard Clock Control
    CPU Host Clock Control..................: Disabled
    CPU Host Frequency (Mhz) ............: 333 Mhz
    PCI Express Frequency (Mhz) .........:100

    C.I.A.2 .................................:Disabled


    Advanced Clock Control
    CPU Clock Drive...........................: 800mV
    PCI Express Clock Drive.................: 900mV
    CPU Clock Skew (ps)....................: 0ps
    MCH Clock Skew (ps)...................: 0ps


    DRAM Performance Control
    Performance Enhance...................: Standard
    (G)MCH Frequency Latch...............: 400

    System Memory Multiplier ..............: 4.00
    Memory Frequency (Mhz) ..............: 1333
    DRAM Timing Selectable ................: Manual

    Standard Timing Control
    CAS Latency Time........................7
    tRCD .........................................8
    tRP'...........................................8
    tRAS..........................................25


    Advanced Timing Control
    tRRD...........................................5
    tWTR..........................................12
    tWR............................................14
    tRFC...........................................65
    tRTP...........................................7
    Command Rate (CMD) ....................2


    Channel A
    Static tRead Value.........................:11
    tRD Phase0 Adjustment...................:Auto
    tRD Phase1 Adjustment...................:Auto
    tRD Phase2 Adjustment .................:Auto
    tRD Phase3 Adjustment..................:Auto
    Trd2rd(Different Rank)....................:Auto
    Twr2wr(Different Rank)...................:Auto
    Twr2rd(Different Rank)...................:Auto
    Trd2wr(Same/Diff Rank)..................:Auto

    Channel B
    Static tRead Value.........................:11
    tRD Phase0 Adjustment...................:Auto
    tRD Phase1 Adjustment...................:Auto
    tRD Phase2 Adjustment .................:Auto
    tRD Phase3 Adjustment..................:Auto
    Trd2rd(Different Rank)....................:Auto
    Twr2wr(Different Rank)...................:Auto
    Twr2rd(Different Rank)...................:Auto
    Trd2wr(Same/Diff Rank)..................:Auto


    Motherboard Voltage Control

    CPU
    CPU Vcore….……….........................:1.22500V

    CPU Termination…..... 1.200V
    CPU PLL…………………....1.500V
    CPU Referen.…………....0.760V


    MCH/ICH
    MCH Core…………….....1.300V
    MCH Reference….…….0.760V
    MCH/DRAM Ref.…......0.750V
    ICH I/O……………….....1.500V

    DRAM Voltage ……....1.700V

    DRAM Termination .…0.7500V
    Channel A Reference :0.750V
    Channel B Reference :0.750V
    Ch.A Address VRef:0.750V
    Ch.B Address VRef:0.750V

    These are the settings i'm using since 31-10-08 and my system has never crashed or anything.
    Now, i decided to put 2 more gigs of ram but couldn't find the same ones or with the same timings so instead i bought a pair of Corsair XMS3-1333 with 9-9-9-24 timings.

    So, to sum it up, existing ram 2X1 GB Gail DDR3 1333 7-8-8-25, working at 1,7 volt in dual channel.
    New additional ram 2X1 GB Corsair DDR3 1333 9-9-9-24, the sticker says that it operates at 1,6 volt.
    How should i configure the bios after i install the additional sticks in order to work in dual channel without problems?
    I repeat that i haven't put the new sticks in yet.
    Any help will be very appreciated.
    Thank you.

  2. #2
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: Advice needed for ram configuration

    You should not mix the modules. It is only advised that you use sticks of the same rated speed, voltages and timings. Those are so different I do not think you should even try to mix them

  3. #3
    Join Date
    Oct 2008
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    Default Re: Advice needed for ram configuration

    Thank you for your answer Lsd. I was beginning to believe nobody would answer.
    I still haven't tried the sticks as i didn't have time to spend on them and i was hoping to get an answer sooner or later.
    I understand you suggest i shouldn't mix them. I respect your opinion as you were the one who got me out of the mess before.
    I really hate to waste your time but the thing is that i allready bought them (found them at great price, couldn't resist) and thought that with a little tuning they would work. Is it helpless?
    You say "It is only advised that you use sticks of the same rated speed, voltages and timings". But they are of the same rated speed and i thought that i could tweak timings and voltages. They are quite close.
    Isn't that so?
    I don't know if you remember my case.
    Is it much to ask you to at least suggest something and i promise that if it doesn't work i won't post back for more help. I will just try to sell them to somebody and that's it.
    To be honest i didn't think that it would be so difficult. I guess i don't
    know much about ram!
    Thanks anyway.
    Last edited by zonar; 03-27-2009 at 01:08 AM.

  4. #4
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: Advice needed for ram configuration

    Well you can try, but you may spend a week trying to stabilize them. But maybe not? You could have good luck with things, I just hate to advise it ya know

    You will have to run them all at maybe 1333Mhz using 888-24 1.6-1.65V, or 999-24 using 1.6-1.65V. After you get that stable you could try lower voltages and or timings.

    See if this will get you anywhere with both kits >>

    Robust Graphics Booster ...............: Auto
    CPU Clock Ratio ..........................: 9x
    Fine CPU Clock Ratio.....................:0.0
    CPU Frequency ...........................: 3Ghz (333x9)


    Clock Chip Control
    Standard Clock Control
    CPU Host Clock Control..................: Disabled
    CPU Host Frequency (Mhz) ............: 333 Mhz
    PCI Express Frequency (Mhz) .........:100

    C.I.A.2 .................................:Disabled


    Advanced Clock Control
    CPU Clock Drive...........................: 800mV
    PCI Express Clock Drive.................: 900mV
    CPU Clock Skew (ps)....................: 0ps
    MCH Clock Skew (ps)...................: 0ps


    DRAM Performance Control
    Performance Enhance...................: Standard
    (G)MCH Frequency Latch...............: Auto

    System Memory Multiplier ..............: 4.00B
    Memory Frequency (Mhz) ..............: 1333
    DRAM Timing Selectable ................: Manual

    Standard Timing Control
    CAS Latency Time........................8/9
    tRCD .........................................8/9
    tRP'...........................................8/9
    tRAS..........................................24

    ^^ 888-24/999-24 Start with 999-24 to make things easy ^^


    Advanced Timing Control
    tRRD...........................................5
    tWTR..........................................12
    tWR............................................14
    tRFC...........................................65
    tRTP...........................................7
    Command Rate (CMD) ....................2


    Channel A
    Static tRead Value.........................:11
    tRD Phase0 Adjustment...................:Auto
    tRD Phase1 Adjustment...................:Auto
    tRD Phase2 Adjustment .................:Auto
    tRD Phase3 Adjustment..................:Auto
    Trd2rd(Different Rank)....................:Auto
    Twr2wr(Different Rank)...................:Auto
    Twr2rd(Different Rank)...................:Auto
    Trd2wr(Same/Diff Rank)..................:Auto

    Channel B
    Static tRead Value.........................:11
    tRD Phase0 Adjustment...................:Auto
    tRD Phase1 Adjustment...................:Auto
    tRD Phase2 Adjustment .................:Auto
    tRD Phase3 Adjustment..................:Auto
    Trd2rd(Different Rank)....................:Auto
    Twr2wr(Different Rank)...................:Auto
    Twr2rd(Different Rank)...................:Auto
    Trd2wr(Same/Diff Rank)..................:Auto


    Motherboard Voltage Control

    CPU
    CPU Vcore….……….........................:1.22500V (Below comment applies here as well)

    CPU Termination…..... 1.200V << Auto (See comment below, applies here as well)
    CPU PLL…………………....1.500V << Auto is fine if you are not overclocking your CPU
    CPU Referen.…………....0.760V << Auto


    MCH/ICH
    MCH Core…………….....1.300V << Maybe less, more can cause issues. Try out 1.2-1.24 for starters

    MCH Reference….…….0.760V << Auto for now
    MCH/DRAM Ref.…......0.750V << Auto
    ICH I/O……………….....1.500V

    DRAM Voltage ……....1.6-1.65V

    DRAM Termination .…0.7500V
    Channel A Reference :0.750V
    Channel B Reference :0.750V
    Ch.A Address VRef:0.750V
    Ch.B Address VRef:0.750V

  5. #5
    Join Date
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    Posts
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    Default Re: Advice needed for ram configuration

    THANK YOU!
    I haven't tried it yet but i promise i will let you know the results. Not ask for more help. Just tell you how it went.
    I kinda have a good feeling about this. We'll see...

  6. #6
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    Oct 2008
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    Default Re: Advice needed for ram configuration

    Hi again Lsdmeasap.
    As i promised, i'm writing this post to give you some feedback about the results.
    Here's the deal.
    Last night i finally decided to put the other 2 sticks on the motherboard.
    I installed them and restarted my pc ready to hit del to enter the BIOS and make the changes you suggested.
    While booting i noticed that the amount of ram (4 Gb) was identified and reported to work in dual channel interleaved. So i left it boot just to see what would happen, waiting for the worst.
    To my surprise windows loaded normal and everything was ok.
    Downloaded the latest version of cpu-z and checked and all 4 sticks were correctly reported. I thought that if i stress my pc it would crash. Watched a full hd movie (The curious case of Benjamin Button FYI) and all was nice and smooth. No artifacts, no crash, no hick-ups.
    Started Orthos and let it run for 45 min while also using my pc and no problems.
    So i went to sleep and let orthos run all nite. I thought that it would definitely crash during the night but when i woke up this morning after 7 hours orthos was still running smooth!
    How is that possible? I mean, this was not supposed to happen, right?
    Is there a point to try and change anything since the rig seems to work fine? Is there a test i should do besides Orthos?
    I told you i had a good feeling about this but didn't expect it to be so easy! Looks like the ram was Plug-And-Play
    What do you think?
    Thanks for your time. I really appreciate it.

  7. #7
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: Advice needed for ram configuration

    Nice to see you had no issues! It's all up to you if you want to try to tighten up the timings for better performance. I would likely, depending on the settings you are using. If you used the ones above those are very loose, I suggested them for you as an initial staring point to get you going. They for sure are not the best for performance and can even be worse then auto would give you.

    So if you need further help or suggestions let me know and give me the settings you are now using. If you are using Auto on any of the memory settings please include a screenshot of Memset so I can see what Auto is giving you >>
    Tweakers.fr ~ Memset

  8. #8
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    Default Re: Advice needed for ram configuration

    Thank you for your interest Lsdmeasap.
    I may have not explained very well the situation.
    I didn't make any changes in BIOS. I just left them as they were and everything works ok.
    I do find it very strange.
    Here is a screenshot of memset. Side by side are the 2 different DIMMS.
    Also in the screenshot are the readings of cpu-z. Again side by side the 2 different DIMMS.
    http://img20.imageshack.us/img20/4854/78925887.jpg
    The corsair Ram is in this page: Welcome to Corsair :: XMS3 Product Information Model TWIN3X2048-1333C9.
    So, the current bios timings are set to 7-8-8-25 at 1,7 V.
    The corsair ram timings are 9-9-9-24 and works on 1,6 V
    The complete set of the BIOS settings i'm using right now are in the first post of this thread.
    See if you can figure out anything.
    If you want any more information, please ask.
    Once more, thank you for your time and effort.

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