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Thread: Dual Channel problem w/ new system




  1. #1
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    Default Dual Channel problem w/ new system

    I recently built a new system and am having trouble getting it to work. After some memory errors, I ran memtest86+ and it freezes at 5 seconds. I tried removing all but one stick of ram, and the test finished with no errors. I did this with each stick, and none of them give any errors. I've also tried this test in each dimm slot and it succeeds.

    It seems to me that the problem is when the memory goes into dual-channel mode, memtest86+ won't complete. Is there anything I should try?

    System info:

    MB: GA-EP45-UD3P
    Intel Core 2 Quad 2.83GHz
    FSB 1333 MHz

    8 GB (2GBx4) PNY DDR2 PC2-5300 667MHz RAM

    Any help would be REALLY appreciated.

    Thanks!
    Last edited by corylation; 01-07-2010 at 10:33 AM.

  2. #2
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    Default Re: Dual Channel problem w/ new system

    http://forums.tweaktown.com/f69/memo...vs-bios-27283/

    Please post a template, with your bios values filled in.

    Two matched sets do not always work well together, but show us your bios settings, as there may be settings that can be improved on.

    You have tried booting with just the one pair?

    Can you borrow a set of different ram to check whether it does the same?





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    OS = Windows 7 Professional x64


  3. #3
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    Default Re: Dual Channel problem w/ new system

    Actually, after working on it for hours yesterday, I started noticing various "memory" problems, sometimes "disk" problems, sometimes "graphics" problems etc... so I'm pretty sure I'm going to RMA the MB -- probably something wrong in the board itself. Its very possible I have one from the "bad set" of this MB that people are talking about online too...

    I'll try to remember to let you all know if the new one poses the same problems.

  4. #4
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    Default Re: Dual Channel problem w/ new system

    There's almost certainly nothing wrong with the board. Every single problem you listed can be put down to errors in RAM. To RMA the board without taking steps to get the RAM stable would be wasting your time. You will have the same problem with the replacement. Add to that the fact that when they test the board and find nothing wrong, at best you'll get the same board back and at worst they'll bill you for the labor costs.

    Note that there is no "bad set" of boards. This is merely internet forum superstition and incorrect guesswork, akin to avoiding the cracks in the pavement. People only post things about boards usually when there's a problem. The problems only occur in probably 2% of cases which is statistically tiny.

    8GB of RAM is notoriously difficult to get running in a stable manner. If memtest86+ Version 4 won't complete then your RAM is definitely the cause. Data corruption in RAM can cause all sorts of issues. The Graphics card was probably mentioned in a BSOD because its driver got corrupted in RAM. The HDD was mentioned because Windows uses RAM to buffer reads and writes to/from the drive, and the data got mangled along the way.

    You need to go through your settings with a fine tooth comb and tweak them carefully. Do as Salty asks and post a template of your full BIOS settings. Only then can anyone help you and prevent you from wasting your time and potentially your money doing an unnecessary RMA.
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  5. #5
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    Default Re: Dual Channel problem w/ new system

    I think that Salty and Psycho101 are related in some way.
    http://forums.tweaktown.com/gigabyte...ench-test.html
    http://www.gigabyte-usa.com/FileList...ios_qflash.pdf
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  6. #6
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    Default Re: Dual Channel problem w/ new system

    Been out of town for a few weeks; picking this back up now.

    Ok, I'll try here before I RMA, thanks for the advice.

    SETTINGS
    Code:
    CPU Clock Ratio [8x]
    Fine CPU Clock Ration [+0.0]
    CPU Frequency 2.66GHz(333x8)
    
    Performance Enhance [Turbo]
    (G)MCH Frequency Latch [333MHz]
    System Memory Multiplier (SPD) [Auto]
    Memory Frequency(MHz) 667 667
    DRAM Timing Selectable (SPD) [Manual]
    
    CAS Latency Time [5]
    tRCD [5]
    tRP [5]
    tRAS [15]
    
    Advanced Timing Control -> [ALL AUTO]
    
    DRAM Voltage 1.800V [1.800V]
    
    
    
    
    
    *** Anything not specified is currently set to [Auto] ***</pre>
    Currently, MemTest86+ runs without errors over 3-4 hours w/ all 8GB RAM installed, but I'm still getting all kinds of strange, random errors all over the OS (or trying to re-install the OS).

    Let me know if any more info is useful, and thank you all so much for your time!
    Last edited by corylation; 01-19-2010 at 07:14 AM.

  7. #7
    Chike is offline Senior Member
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    Default Re: Dual Channel problem w/ new system

    1.8v DRAM Voltage is lower than auto will set it (1.9v).
    Set Performance Enhance standard, for now.
    tRAS 5? Is that correct or is it a typo?
    For 4x2GB you may need much more MCH Core, 1.2-1.28v.
    A screem capture of MemSet main(click >>) and SPD(click spd) windows may be helpful.

  8. #8
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    Default Re: Dual Channel problem w/ new system

    That tRAS was a typo, I fixed it. Should have been 15. I also upped the DRAM voltage to 1.9, so I'll let you know how that works. Unfortunately, I can't post screen caps since I can't get the OS to finish installing (blue screens in install, etc...) :(

    Thanks for the help!

  9. #9
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    Default Re: Dual Channel problem w/ new system

    Well, that didn't fix the problem, but it did give me a different bluescreen. This one provided an actual error message, namely "BAD_POOL_CALLER" which is generally caused by a corrupted pool address being passed, which supports the theory that the memory is the culprit!

    Thanks again to you all, and keep the suggestions coming if you have them :)

  10. #10
    Chike is offline Senior Member
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    Default Re: Dual Channel problem w/ new system

    DRAM Voltage alone is not going to fix it, but may help fixing it.
    Set Performance Enhance standard.
    MCH Core 1.2v, increase if needed, one step at a time, up to 1.32v.

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