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Thread: Testing the same RAM stick in each slot. DDR3 Channel 1 slower than Channel 0?




  1. #1
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    Default Testing the same RAM stick in each slot. DDR3 Channel 1 slower than Channel 0?

    While testing a memory stick, I ran Memtest86+ with the stick plugged into each of the 4 slots on my Gigabyte MoBo. I noticed the following difference on the Memtest screen, and it has me wondering if there might be a problem with my MoBo?

    Slots 1 and 3 - Memtest Settings: RAM: 800 MHz DDR1600 8-8-8-30
    Slots 2 and 4 - Memtest Settings: RAM: 200 MHz DDR400 8-8-8-30

    Why the lower values in slots 2 and 4? Is this normal?



    <DD>Mobo: Gigabyte GA-890GPA-UD3H<DD>BIOS: F7B<DD>CPU: AMD Phenom IIX4 965 3.4GHz BE AM3<DD>RAM: OCZ3G1600LV4GK (2x2MB)<DD>Vid: Gigabyte Radeon HD 4350<DD>PSU: OCZ Stealth 700<DD>HDD: Western Digital<DD>OS: Windows 7 Ultimate


    </DD>

  2. #2
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    Default Re: Testing the same RAM stick in each slot. DDR3 Channel 1 slower than Channel 0?

    Odd? We have seen this here before and it was the cpu.
    You may want to check the pins on the cpu first.
    If you wish we can research this some more.
    What are the settings in the bios set to. Could you run the test again and check it out? Below are some templates you can print so when you go into Bios you can put your bios settings on them and post them here if you want. You may want to post it for each channel1 memory socket DDR3-1 and 2. Then try it on channel2 memory socket DDR3-3 and 4
    Code:
    PC Health Status
    Hardware Thermal Control [Enabled]
    Reset Case Open Status [Disabled]
    Case Opened No
    Vcore 1.364V
    DDR3 1.5V 1.536V
    +3.3V 3.280V
    +12V 12.048V
    Current System Temperature 38oC
    Current CPU Temperature 36oC
    Current CPU FAN Speed 1962 RPM
    Current SYSTEM FAN1 Speed 0 RPM
    Current SYSTEM FAN2 Speed 0 RPM
    Current POWER FAN Speed 0 RPM
    CPU Warning Temperature [Disabled]
    CPU FAN Fail Warning [Disabled]
    SYSTEM FAN1 Fail Warning [Disabled]
    SYSTEM FAN2 Fail Warning [Disabled]
    POWER FAN Fail Warning [Disabled]
    CPU Smart FAN Control [Enabled]
    CPU Smart FAN Mode [Auto]
    System Smart FAN Control [Enabled]
    Code:
    MB Intelligent Tweaker(M.I.T.)
    } IGX Configuration [Press Enter]
    CPU Clock Ratio [Auto] 2800Mhz
    CPU NorthBridge Freq. [Auto] 2000Mhz
    CPU Host Clock Control [Auto]
    x CPU Frequency(MHz) 200
    PCIE Clock(MHz) [Auto]
    HT Link Width [Auto]
    HT Link Frequency [Auto] 2000Mhz
    Set Memory Clock [Auto]
    x Memory Clock x6.66 1333Mhz
    } DRAM Configuration [Press Enter]Press Enter
    ******** System Voltage Optimized ********
    System Voltage Control [Auto]
    x CPU PLL Voltage Control Auto
    x DRAM Voltage Control Auto
    x DDR VTT Voltage Control Auto
    x NB Voltage Control Auto
    x SidePort Mem Volt Control Auto
    x NB/PCIe/PLL Voltage Control Auto
    x CPU NB VID Control Auto
    x CPU Voltage Control Auto
    Normal CPU Vcore 1.3250V
    Code:
    DRAM Configuration
    DCTs Mode [Unganged]
    DDR3 Timing Items [Auto] SPD Auto
    x CAS# latency Auto 9T 9T
    x RAS to CAS R/W Delay Auto 9T 9T
    x Row Precharge Time Auto 9T 9T
    x Minimum RAS Active Time Auto 24T 24T
    x 1T/2T Command Timing Auto -- --
    x TwTr Command Delay Auto 5T 5T
    x Trfc0 for DIMM1 Auto 110ns 110ns
    x Trfc2 for DIMM2 Auto -- --
    x Trfc1 for DIMM3 Auto -- --
    x Trfc3 for DIMM4 Auto -- --
    x Write Recovery Time Auto 10T 10T
    x Precharge Time Auto 5T 5T
    x Row Cycle Time Auto 33T 33T
    x RAS to RAS Delay Auto 4T 4T
    **DCTs Drive Strength** DCT0 DCT1
    ProcOdt(ohms) [Auto] 60 [Auto] 60
    DQS drive Strength [Auto] 1.0x [Auto] 1.0x
    Data drive Strength [Auto] 1.0x [Auto] 1.0x
    MEMCLK drive Strength [Auto] 1.25x [Auto] 1.25x
    Addr/Cmd drive Strength [Auto] 1.5x [Auto] 1.5x
    CS/ODT drive Strength [Auto] 1.5x [Auto] 1.5x
    CKE drive Strength [Auto] 1.5x [Auto] 1.5x
    Bank Interleaving [Enabled]
    Channel interleave [Enabled
    Last edited by artdrivers; 04-29-2010 at 07:17 PM.
    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


  3. #3
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: Testing the same RAM stick in each slot. DDR3 Channel 1 slower than Channel 0?

    When you see the "400" does it show a different/much lower bandwidth as well?

    Are you using the latest Memtest86+ 4.00 Version? If not be sure you are:
    Memtest86+ - Advanced Memory Diagnostic Tool

    Could just be a cosmetic issue guys if you do not find any other cause, and the author may need you to send in your CPU-z Dump so he can update for the next version

  4. #4
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    Default Re: Testing the same RAM stick in each slot. DDR3 Channel 1 slower than Channel 0?

    Here is a manual Bios change you may want to try. If you are running 1 module in the second slot of a dual channel system. Please let us know if this helps.
    Bank Interleaving
    Enables or disables memory bank interleaving. Enabled allows the system to simultaneously access different banks of the memory to increase memory performance and stability. (Default: Enabled) Channel interleave
    Enables or disables memory channel interleaving. Enabled allows the system to simultaneously access different channels of the memory to increase memory performance and stability. (Default: Enabled)
    Code:
    DRAM Configuration
    DCTs Mode [Unganged]
    DDR3 Timing Items [Auto] SPD Auto
    x CAS# latency Auto 9T 9T
    x RAS to CAS R/W Delay Auto 9T 9T
    x Row Precharge Time Auto 9T 9T
    x Minimum RAS Active Time Auto 24T 24T
    x 1T/2T Command Timing Auto -- --
    x TwTr Command Delay Auto 5T 5T
    x Trfc0 for DIMM1 Auto 110ns 110ns
    x Trfc2 for DIMM2 Auto -- --
    x Trfc1 for DIMM3 Auto -- --
    x Trfc3 for DIMM4 Auto -- --
    x Write Recovery Time Auto 10T 10T
    x Precharge Time Auto 5T 5T
    x Row Cycle Time Auto 33T 33T
    x RAS to RAS Delay Auto 4T 4T
    **DCTs Drive Strength** DCT0 DCT1
    ProcOdt(ohms) [Auto] 60 [Auto] 60
    DQS drive Strength [Auto] 1.0x [Auto] 1.0x
    Data drive Strength [Auto] 1.0x [Auto] 1.0x
    MEMCLK drive Strength [Auto] 1.25x [Auto] 1.25x
    Addr/Cmd drive Strength [Auto] 1.5x [Auto] 1.5x
    CS/ODT drive Strength [Auto] 1.5x [Auto] 1.5x
    CKE drive Strength [Auto] 1.5x [Auto] 1.5x
    Bank Interleaving [Disabled]
    Channel interleave [Disabled
    That may be why this is offered in BIOS. Although I'm not sure.
    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


  5. #5
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    Default Re: Testing the same RAM stick in each slot. DDR3 Channel 1 slower than Channel 0?

    Thanks for responding to my post!

    LSDMe, yes, I am using Memtest86+ V4.0, and yes, on slots 2 and 4 when Memtest is reporting DDR400, it is reporting slower speed of 200MHz compared to 800MHz/DDR1600 on slots 1 and 3.

    Artdrivers, I retested again last night (ran with one stick testing each DDR3 slot) with same results. I took a photo of each BIOS screen and during the test I photographed each DRAM BIOS and Memtest screen. Now I have a lot to summarize for you!

    Yesterday OCZ diagnosed that one of my RAM sticks is bad, and issued an RMA. Now I'm wondering if my MoBo or CPU somehow throttled back a channel because of a bad RAM stick. Maybe the sensible thing to do now is wait for the new RAM, and see if the system corrects itself when they are installed and I load optimized defaults. If that doesn't work, I'll get back to you with all the details of my settings and test results. Also, my MoBo is tired of having RAM pushed in and pulled out.

    Thanks again for your replies.
    Last edited by Derek99; 04-29-2010 at 10:36 PM.

  6. #6
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    Default Re: Testing the same RAM stick in each slot. DDR3 Channel 1 slower than Channel 0?

    x Trfc0 for DIMM1 Auto 110ns 110ns
    x Trfc2 for DIMM2 Auto -- --
    x Trfc1 for DIMM3 Auto -- --
    x Trfc3 for DIMM4 Auto -- --
    Yeah this is normal. It is a bit confusing I agree.
    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


  7. #7
    Lsdmeasap's Avatar
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    Default Re: Testing the same RAM stick in each slot. DDR3 Channel 1 slower than Channel 0?

    Quote Originally Posted by Derek99 View Post
    Thanks for responding to my post!

    LSDMe, yes, I am using Memtest86+ V4.0, and yes, on slots 2 and 4 when Memtest is reporting DDR400, it is reporting slower speed of 200MHz compared to 800MHz/DDR1600 on slots 1 and 3.

    Artdrivers, I retested again last night (ran with one stick testing each DDR3 slot) with same results. I took a photo of each BIOS screen and during the test I photographed each DRAM BIOS and Memtest screen. Now I have a lot to summarize for you!

    Yesterday OCZ diagnosed that one of my RAM sticks is bad, and issued an RMA. Now I'm wondering if my MoBo or CPU somehow throttled back a channel because of a bad RAM stick. Maybe the sensible thing to do now is wait for the new RAM, and see if the system corrects itself when they are installed and I load optimized defaults. If that doesn't work, I'll get back to you with all the details of my settings and test results. Also, my MoBo is tired of having RAM pushed in and pulled out.

    Thanks again for your replies.
    Thanks! Does it also still show the DDR400 if you switch memory sticks and use the other sticks in those same 2 slots 2+4?

  8. #8
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    Default Re: Testing the same RAM stick in each slot. DDR3 Channel 1 slower than Channel 0?

    OK, continuing this puzzle....

    I received and tested new RAM sticks. I switched from OCZ Gold to G.Skill DDR3-1600 F3-12800CL7D-4GBRM. These sticks pass Memtest86+ V4.0 without any errors. With optimized defaults they run at 1333. When I use the recommended BIOS adjustments to get this RAM to 1600, I only get 1333 and occasional BSODs. Here are the adjustments:

    DRAM Voltage Control: 1.605
    Memory Clock x8.00
    x CAS# latency 8T
    x RAS to CAS R/W Delay 8T
    x Row Precharge Time 8T
    x Minimum RAS Active Time Auto 24T

    Back to the original question: With the new G.Skill RAM and one stick in slot 2 or 4 Memtest is still reporting DDR400 and 200MHz compared to DDR1600/800MHz on slots 1 and 3.

    I tried it with Bank Interleaving and Channel interleave DISABLED as suggested by artdrivers, and still got the same result - 400/200.

    I'm wondering if this could be a CPU problem and if it could be preventing me from getting to 1600. My 30 day CPU return window is soon to close.

    What can I do next to help you guys help me? Thanks!

    Derek

  9. #9
    Lsdmeasap's Avatar
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    Default Re: Testing the same RAM stick in each slot. DDR3 Channel 1 slower than Channel 0?

    Did you test ganged and unganged as well?

    Could be a CPU issue for sure!

  10. #10
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    Default Re: Testing the same RAM stick in each slot. DDR3 Channel 1 slower than Channel 0?

    It was running unganged by default. When I switched to ganged (everything else optimized default), memtest still showed DDR400/200MHz in slots 2/4.

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