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Thread: Dual Channel Memory Problems




  1. #1
    Join Date
    Aug 2009
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    Default Dual Channel Memory Problems

    Hi everyone,

    This is my first post, and my first custom build as well. Here are my system specs.

    Gigabyte GA-Ep45UD3P Mobo
    2xCorsair 2 gig DDR2 800 (1.8v)
    Core 2 Quad 8400 2.66GHz
    Nvidia 8600 GT 256 DDR3 128 bit bus width
    650w Coolmax PSU
    Vista Ultimate 64bit

    My issue is as follows. This is consistent across TWO of the same motherboard. RMA'd the first one because of this, bought a new in box, same model and I'm getting the same issue.

    I can run Windows Diagnostic Tool on either ram stick individually in any slot and I get no errors. Similarly, both sticks will individually pass the windows based Memtest up to 300 percent with 0 errors.

    However, once I place ram in slots 1 and 3 to activate dual channel, I will PASS windows diagnostic tool, but run into errors in Memtest. It will also occasionally blue screen and crash when running Dual Channel mode. This is true for any settings in the bios that I've done over the last 2 days, including manually setting all my voltages to the prescribed settings. I've gone so far as to manually set most all timings instead of leaving them on auto, but still the machine is unstable.

    I've updated the gigabyte bios to version FB as well.

    Right now my timings for the ram is as follows (true for both sticks)...

    DRAM frequency: alternates between 400 and 399.9 MHz (when viewing on CPU-Z)
    FSB:DRAM 5:6
    CAS LATENCY: 5
    RAS TO CAS DELAY (tRCD): 5
    RAS PRECHARGE (tRP): 5
    Cycle Time (tRAS): 18 clocks
    Row Refresh Cycle Time (tRFC): 42 clocks
    Command Rate (CR): 2T

    CPU-Z also reports that I am in dual channel/symmetric mode.

    I've tried the mobo's default setting of 'turbo', 'standard' and 'extreme' with more stability on 'turbo', but ultimately the same results occur.

    When booting, I get the error beep code that indicates a problem with the GPU. When I hit reset, it boots fine. This happens everytime from a cold restart. On my old Dell, where I scavenged the vid card from, it would give me an error at boot that said 'Warning, card in pci slot 1 is operating in 1x mode'. I never could figure that one out, but never experienced stability or graphics issues.

    That's all I can think of in regards to the issue. I've tried to be as thorough as possible, but if there's any more information you guys might need in order to help me out, I'd be happy to post that ASAP! And, of course, please forgive me if I'm missing something obvious... like I say, first build!

    Thoughts?

  2. #2
    profJim's Avatar
    profJim is online now Chief Munchkin + moderator
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    Default Re: Dual Channel Memory Problems

    Try the basic settings in this post AFTER you've loaded optimized bios settings from the main bios screen.
    Your memory voltage should probably set to 1.90 - 2.00 volts and MCH Core voltage should probably be set to 1.20 volts or a bit higher.
    Which bios version are you running?

    Please provide a link to your memory's specs.
    Use the P45 bios template to post your bios settings.
    Q9650 @ 4.10GHz [9x456MHz]
    P35-DS4 [rev: 2.0] ~ Bios: F14
    4x2GB OCZ Reaper PC2-8500 1094MHz @5-5-5-15
    MSI N460GTX Hawk Talon Attack (1GB) video card <---- SLI ---->
    Seasonic SS-660XP2 80 Plus Platinum psu (660w)
    WD Caviar Black WD6401AALS 640GB (data)
    Samsung 840 Pro 256GB SSD (boot)
    SLI @ 16/4 works when running HyperSLI
    Cooler Master 120XL Seidon push/pull AIO cpu water cooling
    Cooler Master HAF XB computer case (RC-902XB-KKN1)
    Asus VH242H 24" monitor [1920x1080]
    MSI N460GTX Hawk (1GB) video card
    Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium
    HT|Omega Claro plus+ sound card
    CyberPower CP1500PFCLCD UPS
    E6300 (R0) @ 3.504GHz [8x438MHz] ~~ P35-DS3L [rev: 1.0] ~ Bios: F9 ~~ 4x2GB Kingston HyperX T1 PC2-8500, 876MHz @4-4-4-10
    Seasonic X650 80+ gold psu (650w) ~~ Xigmatek Balder HDT 1283 cpu cooler ~~ Cooler Master CM 690 case (RC-690-KKN1-GP)
    Samsung 830 128GB SSD MZ-7PC128B/WW (boot) ~~ WD Caviar Black WD6401AALS 640GB (data) ~~ ZM-MFC2 fan controller
    HT|Omega Striker 7.1 sound card ~~ Asus VH242H monitor [1920x1080] ~~ Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium ~~ CyberPower CP1500PFCLCD U.P.S
    .


  3. #3
    Join Date
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    Default Re: Dual Channel Memory Problems

    These are my memory specs. Sorry, this is the closest I can find without giving you my entire cpu-z printout.

    Newegg.com - CORSAIR 4GB &#40;2 x 2GB&#41; 240-Pin DDR2 SDRAM DDR2 800 &#40;PC2 6400&#41; Desktop Memory Model VS4GBKIT800D2 G - Desktop Memory

    As for my bios settings, I continue to try variations of your suggestions. Thank you for that information. So far it's been the same story - failures of memory tests. I can't really post my bios settings because they're constantly in flux as nothing has worked any better than anything else really. Right now they closely mirror your link, with my ram voltage up to 2.0 as suggested.

    I'm using the most updated bios for the ga-ep45-ud3p, version FB.

    Has anyone found that these mobo's just don't like Corsair for some reason? After so many days of this same issue on multiple mobo's, it seems like a LOT of tweaking for dual channel, when I can run single channel with no stability issues in a variety of setting changes in the bios.

    I'll try some more setting changes and see what I come up with.

  4. #4
    Chike is offline Senior Member
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    Default Re: Dual Channel Memory Problems

    Concentrate on memory and MCH Core settings all other can be left on auto.
    With Performance Enhanced standard and DRAM Voltage 1.9v try increasing MCH Core from 1.6v up to 1.26v, and check stability for every increment.
    You may want to try the memory in slots 2 & 4 if this failes (or even if it does not) to see if there's any problem prsists.

  5. #5
    profJim's Avatar
    profJim is online now Chief Munchkin + moderator
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    Default Re: Dual Channel Memory Problems

    For testing purposes, I ran my memory in slots 2 & 4 for several months with no problems.

    If tRFC = 42, this is too low for 2x2GB. If it's set to AUTO, the value shown in Memset will probably be 68.

    It's important that we can see which settings are on AUTO and which ones you've set manually.
    Please post your bios settings, including a range of bios settings that your tried.
    Q9650 @ 4.10GHz [9x456MHz]
    P35-DS4 [rev: 2.0] ~ Bios: F14
    4x2GB OCZ Reaper PC2-8500 1094MHz @5-5-5-15
    MSI N460GTX Hawk Talon Attack (1GB) video card <---- SLI ---->
    Seasonic SS-660XP2 80 Plus Platinum psu (660w)
    WD Caviar Black WD6401AALS 640GB (data)
    Samsung 840 Pro 256GB SSD (boot)
    SLI @ 16/4 works when running HyperSLI
    Cooler Master 120XL Seidon push/pull AIO cpu water cooling
    Cooler Master HAF XB computer case (RC-902XB-KKN1)
    Asus VH242H 24" monitor [1920x1080]
    MSI N460GTX Hawk (1GB) video card
    Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium
    HT|Omega Claro plus+ sound card
    CyberPower CP1500PFCLCD UPS
    E6300 (R0) @ 3.504GHz [8x438MHz] ~~ P35-DS3L [rev: 1.0] ~ Bios: F9 ~~ 4x2GB Kingston HyperX T1 PC2-8500, 876MHz @4-4-4-10
    Seasonic X650 80+ gold psu (650w) ~~ Xigmatek Balder HDT 1283 cpu cooler ~~ Cooler Master CM 690 case (RC-690-KKN1-GP)
    Samsung 830 128GB SSD MZ-7PC128B/WW (boot) ~~ WD Caviar Black WD6401AALS 640GB (data) ~~ ZM-MFC2 fan controller
    HT|Omega Striker 7.1 sound card ~~ Asus VH242H monitor [1920x1080] ~~ Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium ~~ CyberPower CP1500PFCLCD U.P.S
    .


  6. #6
    Join Date
    Aug 2009
    Posts
    10

    Default Re: Dual Channel Memory Problems

    here is my current setup. I'll give 2 and 4 a go once I get your guys' thoughts on this. Keep in mind this is only where it is right now.
    This passes the diagnostic, but fails memtest miserably.

    Motherboard: ga-ep45-ud3p bios version fb
    Cpu: core 2 quad 8400 2,66 ghz yorkshire
    Ram: CORSAIR 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Desktop Memory Model VS4GBKIT800D2 G'
    Newegg.com - CORSAIR 4GB &#40;2 x 2GB&#41; 240-Pin DDR2 SDRAM DDR2 800 &#40;PC2 6400&#41; Desktop Memory Model VS4GBKIT800D2 G - Desktop Memory
    Power Supply Unit: coolmax 6500, 650w

    note: replace all ?? with the value displayed in your bios.
    ----> Replace "Auto" with manually set values.

    MB Intelligent Tweaker(M.I.T.)
    Robust Graphics Booster -------------- : [Auto]
    CPU Clock Ratio ---------------------- : [8x]
    Fine CPU Clock Ratio ----------------- : [0.0] <-- ignore if not available
    CPU Frequency ---------------------: 2.66ghz(333x8) <-- this is set by your bios

    Clock Chip Control
    Standard Clock Control
    CPU Host Clock Control --------------- : [Enabled]
    CPU Host Frequency (Mhz) --------------: [333]
    PCI Express Frequency (Mhz) ---------- : [100] <--- Set to 100, never leave this on Auto

    C.I.A.2 ------------------------------ : [Disabled]

    Advanced Clock Control ------- [Press Enter]
    CPU Clock Drive ---------------------- : [800mv]
    PCI Express Clock Drive -------------- : [900mv]
    CPU Clock Skew (ps) ------------------ : [0ps]
    MCH Clock Skew (ps) ------------------ : [0ps]

    DRAM Performance Control
    Performance Enhance ------------------- : [Turbo] <--- set to STANDARD when overclocking
    Extreme Memory Profile --- (X.M.P.) --- : [Disabled] <--- Leave this Disabled
    (G)MCH Frequency Latch ---------------- : [Auto]
    System Memory Multiplier -------------- : [2.66D] <-- this is the setting that you are using
    Memory Frequency (Mhz) ---------------- : [889]
    DRAM Timing Selectable ---------------- : [manual] <-- set to MANUAL for overclocking

    Standard Timing Control
    CAS Latency Time -------- 5 ---------- : [Auto]
    tRCD ------------------- 5 ---------- : [Auto]
    tRP --------------------- 5 ---------- : [Auto]
    tRAS ------------------- 18 ---------- : [Auto]

    Advanced Timing Control
    tRRD ------------------- 3 ---------- : [Auto]
    tWTR ------------------- 3 ---------- : [Auto]
    tWR --------------------- 6 ---------- : [Auto]
    tRFC ------------------- 42 ---------- : [Auto]
    tRTP ------------------- 3 ---------- : [Auto]
    Command Rate (CMD) -------------------- : [Auto] <--- Auto or 0 is OK

    Driving Strength Profiles
    Driving Strength --------- : Press Enterr <--- press ENTER to modify memory sub-timings when overclocking

    Channel A
    Static tRead Value --------------------- :7 [Auto]
    tRD Phase0 Adjustment ------------------ :1 [Auto] <-- leave this and below set to AUTO
    tRD Phase1 Adjustment ------------------ :0 [Auto]
    tRD Phase2 Adjustment ------------------ :0 [Auto]
    tRD Phase3 Adjustment ------------------ :0 [Auto]
    Trd2rd(Different Rank) ----------------- :6 [Auto]
    Twr2wr(Different Rank) ----------------- :6
    Twr2rd(Different Rank) ----------------- :5 [Auto]
    Trd2wr(Same/Diff Rank) ----------------- :8 [Auto]
    Dimm1 Clock Skew Control --------------- : [Auto] ps
    Dimm2 Clock Skew Control --------------- : [Auto] ps

    Channel B
    Static tRead Value --------------------- :7 [Auto]
    tRD Phase0 Adjustment ------------------ :0 [Auto] <-- leave this and below set to AUTO
    tRD Phase1 Adjustment ------------------ :0 [Auto]
    tRD Phase2 Adjustment ------------------ :0 [Auto]
    tRD Phase3 Adjustment ------------------ :0 [Auto]
    Trd2rd(Different Rank) ----------------- :6 [Auto]
    Twr2wr(Different Rank) ----------------- :6 [Auto]
    Twr2rd(Different Rank) ----------------- :5 [Auto]
    Trd2wr(Same/Diff Rank) ----------------- :8 [Auto]
    Dimm1 Clock Skew Control --------------- : [Auto] ps
    Dimm2 Clock Skew Control --------------- : [Auto] ps

    Motherboard Voltage Control
    CPU
    Voltage Types------------ Normal -------- Current -----
    Load-Line Calibration ----------------- : [Disabled]
    CPU Vcore --------------- 1.28750v ---- : [1.28750v]

    CPU Termination --------- 1.200v* ----- : [1.200v]
    CPU PLL ----------------- 1.500V* ----- : [1.500v]

    CPU Reference ----------- 0.760* ----- : [Auto]
    CPU Reference2 ---------- ?.???V* ----- : [Auto]

    MCH/ICH
    MCH Core ---------------- 1.100V ------- : [1.200v]
    MCH Reference ----------- 0.760V ------- : [Auto]
    MCH/DRAM Ref ------------ 0.900V ------ : [Auto]
    ICH I/O ----------------- 1.500V ------- : [1.500v]
    ICH Core ---------------- 1.100V ------- : [1.100v]
    DRAM
    DRAM Voltage ------------ 1.800V ------- : [2.000v]
    DRAM Termination -------- 0.900V ------- : [Auto]
    Channel A Reference ----- 0.900V ------- : [Auto]
    Channel B Reference ----- 0.900V ------- : [Auto]

    Advanced Settings
    Limit CPUID Max. to 3 ------------------ : [Disabled]
    No-Execute Memory Protect -------------- : [Enabled]
    CPU Enhanced Halt (C1E) ---------------- : [Disabled]
    C2/C2E State Support ------------------- : [Disabled]
    x C4/C4E State Support ----------------- : [Disabled]
    CPU Thermal Monitor 2 (TM2) ------------ : [Enabled]
    CPU EIST Function --------------------- : [Disabled]
    Virtualization Technology -------------- : [Disabled]

    Integrated Peripherals
    Legacy USB Storage Detect ------------- : [Disabled]

  7. #7
    profJim's Avatar
    profJim is online now Chief Munchkin + moderator
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    Default Re: Dual Channel Memory Problems

    Your settings look good.
    Try Performance Enhance = Standard
    In a few cases, MCH Core = 1.05 is required, give it a try.

    Do you have access to another set of ram that you can test with?
    Q9650 @ 4.10GHz [9x456MHz]
    P35-DS4 [rev: 2.0] ~ Bios: F14
    4x2GB OCZ Reaper PC2-8500 1094MHz @5-5-5-15
    MSI N460GTX Hawk Talon Attack (1GB) video card <---- SLI ---->
    Seasonic SS-660XP2 80 Plus Platinum psu (660w)
    WD Caviar Black WD6401AALS 640GB (data)
    Samsung 840 Pro 256GB SSD (boot)
    SLI @ 16/4 works when running HyperSLI
    Cooler Master 120XL Seidon push/pull AIO cpu water cooling
    Cooler Master HAF XB computer case (RC-902XB-KKN1)
    Asus VH242H 24" monitor [1920x1080]
    MSI N460GTX Hawk (1GB) video card
    Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium
    HT|Omega Claro plus+ sound card
    CyberPower CP1500PFCLCD UPS
    E6300 (R0) @ 3.504GHz [8x438MHz] ~~ P35-DS3L [rev: 1.0] ~ Bios: F9 ~~ 4x2GB Kingston HyperX T1 PC2-8500, 876MHz @4-4-4-10
    Seasonic X650 80+ gold psu (650w) ~~ Xigmatek Balder HDT 1283 cpu cooler ~~ Cooler Master CM 690 case (RC-690-KKN1-GP)
    Samsung 830 128GB SSD MZ-7PC128B/WW (boot) ~~ WD Caviar Black WD6401AALS 640GB (data) ~~ ZM-MFC2 fan controller
    HT|Omega Striker 7.1 sound card ~~ Asus VH242H monitor [1920x1080] ~~ Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium ~~ CyberPower CP1500PFCLCD U.P.S
    .


  8. #8
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: Dual Channel Memory Problems

    I suggest you use the latest BIOS, which is F10e here >>
    http://forums.tweaktown.com/f69/giga...st-bios-28441/

    Not sure where you are getting Fb or FB BIOS, or if that is just a misprint or mis-reading? But please do not use @BIOS to update, use Qflash. Here is a guide >>
    http://forums.tweaktown.com/f69/bios...h-guide-27576/

    There is no Quad Core 8400 Yorkshire? So not sure what you meant there either? NO quad 8400 and no yorkshire CPU's? Just checking in with you, are you not sure what CPU you are using? If you are not please post an image of CPU-z main tab open for us, here is that program >>
    CPUID

    You should be using 2.40B for your system memory multiplier not 2.66D

    I would go ahead and manually set Static tRead Values, both channels, for now to 8

    Then I would set at the most 1.9V for your memory voltage, it is rated to 1.8V and 2.0V may be causing you errors

    And then also set 1.20-1.24 MCH Core Voltage

  9. #9
    Join Date
    Aug 2009
    Posts
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    Default Re: Dual Channel Memory Problems

    Wow I had no idea that @BIOS was that dangerous! Thank you for the tip - glad I haven't bricked this thing yet.

    And I apologize, this is my CPU:

    Intel Core 2 Quad Q8400 Yorkfield 2.66GHz LGA 775 95W Quad-Core Processor Model BX80580Q8400

    Yorkfield - not shire. Watching Gordon Ramsay made me go super british for a minute.

    I'm going to try these changes, including flashing with Qflash. I'll update soon with progress.

    By the way, and this might be a dumb question... but am I correct in thinking that if my memory settings and hardware are all working as intended, I should pass memtest 100 percent every time? In other words, is this test reliable in telling me that what I'm changing in the bios is working or not working?
    Last edited by Josh423; 08-20-2009 at 05:52 AM.

  10. #10
    Join Date
    Jul 2009
    Posts
    4

    Default Re: Dual Channel Memory Problems

    Quote Originally Posted by Lsdmeasap View Post
    Not sure where you are getting Fb or FB BIOS, or if that is just a misprint or mis-reading? But please do not use @BIOS to update, use Qflash. Here is a guide >>
    http://forums.tweaktown.com/f69/bios...h-guide-27576/
    I think he may have the Rev 1.6 board like I do and the BIOS are numbered differently. My Rev 1.6 came with FB from the factory and the newest BIOS is FDa.

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