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Thread: Dual Channel Memory Problems




  1. #11
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    Default Re: Dual Channel Memory Problems

    Yes, it is a revision 1.6 board. I just got off the phone with Gigabyte and have updated the bios to the most recent version.

    The tech told me that even though ram may individually pass memory tests in single channel mode, it can be faulty in dual channel. He also said that there was no need to change any 'auto' settings to successfully stabilize the machine. That made me a little wary as I've never seen a forum that advocates just 'leaving the bios alone' so to speak.

    Anyone confirm that the ram could be stable in single channel, but faulty in dual channel?

  2. #12
    Chike is offline Senior Member
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    Default Re: Dual Channel Memory Problems

    The only time I hade ram that was working fine in single slot and was faulty in dual channel mode was with my former ASUS board. In fact two different pairs of two different brands "became" faulty, but then by a miracle they began to work again in my current board.

  3. #13
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    Default Re: Dual Channel Memory Problems

    Yeah I was afraid that it'd be something related to the mobo hardware. Well, let me expand a bit and give some more insights into the machine. All of this is true and consistent for this motherboard AND the one I tested pretty extensively before this one... same model, same everything.

    Boot issues. This is what happens everytime from a cold start.

    1. Power On, long delay and a long beep indicating graphics card problem.
    2. Press Reset, one short beep indicating successful boot. If I don't go into bios, it has me select my vista partition, then tries to load windows. It stalls out and the CPU fan stops spinning. It'll just sit there.
    3. Press Reset AGAIN, this time everything boots into windows just fine.

    3 steps everytime from a cold start, consistent across both GA-EP45-UD3P's.

    Some more issues: Now I get memory errors if i try to run both ram sticks in single channel mode as well. I haven't tested my settings as extensively as in trying to troubleshoot this for dual channel, but the settings i have tried that make sense to me have resulted in similar memory errors and blue screens.

    I went ahead and flashed the new bios, tried every suggestion here from you kind people (thank you again, btw), all to no avail. Total it's been about 20 hours of trying different combinations of settings. Some settings are more stable than others, but ultimately nothing will keep me going for long and everything will fail the windows memtest.

    At this point, my question is this. What are the odds that two boards would have the EXACT same symptoms and issues like this after such extensive troubleshooting? Is it really this sensitive with bios settings that I still have yet to just find that sweet spot?

    Or, is the fact that this has happened on two brand new motherboards indicate that my ram is just faulty, despite it passing individual memory tests in all 4 slots of the mobo? Could this be related to my video card?

    I already ordered new ram, some G.SKILL 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1066 (PC2 8500) Dual Channel Kit Desktop Memory Model F2-8500CL5D-4GBPK

    It had some good recommendations and also came highly rated by a friend of mind who has built a few of his own machines.

    I guess I'm asking for speculation as to what you guys might think? I'd really hate to have to RMA this board, this is board number 4 and that's pretty crazy. Thanks

  4. #14
    Chike is offline Senior Member
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    Default Re: Dual Channel Memory Problems

    If you post you most stable settings you found so far maybe we'd be able to see what can be done.
    I have no idea about the grapcs card problem but it might also be related to the memory problem if there is one.
    Maybe the G.Skill memory will make a difference, sometimes there compatibility issues with specific memory modules and motherboards, we'll see.

  5. #15
    profJim's Avatar
    profJim is online now Chief Munchkin + moderator
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    Default Re: Dual Channel Memory Problems

    Mobo/psu incompatibility is a possibility. Can you borrow a psu to test with.
    You might want to test with another video card, preferably one that won't require video driver uninstallation/re-installation.

    Worst case scenario, test with another cpu, making sure that there aren't any bent pins in the mobo's cpu socket.

    Two brand new mobo's with identical problems....remotely possible, but not very likely.
    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. #16
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    Default Re: Dual Channel Memory Problems

    Yeah the most stable settings are with everything typed in manually to the prescribed settings, the ram voltage set to 1.900v, the board on 'Turbo' and the MCH bumped up to 1.26. But even that only gets me 15 percent through memtest before failing. I ran that for 5 hours while doing some stress testing on the machine. It did fairly well, but ultimately crashed out on me.

    I can't really rule out that it's a bent pin issue. I didn't see that any were bent, but I may have done that when installing the CPU. I doubt it though, I was very very very gentle.

    New GPU and RAM en route now. I'll post up my results after installing those and see what's what.

  7. #17
    profJim's Avatar
    profJim is online now Chief Munchkin + moderator
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    Default Re: Dual Channel Memory Problems

    When you post your new hardware results, be sure to add the new hardware to your forum signature so that we don't get confused by the facts.
    Don't overlook possibly testing with another psu.

    Good luck with the new hardware.
    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. #18
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    Aug 2009
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    Default Re: Dual Channel Memory Problems

    I will definitely do that when the new hardware gets here.

    By the way... I reset the bios to optimized defaults, left 1 stick of ram in slot one and let it go on a windows memtest for 4 hours. At somewhere around 700%, it gave me 2 errors. I knew it felt choppy in the OS. I'm hoping that's an indicator of faulty ram that can be replaced soon.

    I will update asap, just wanted to throw that out there in attempts to strengthen the case that's it's the ram.

  9. #19
    Chike is offline Senior Member
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    Default Re: Dual Channel Memory Problems

    Only one of the two sticks fails?

  10. #20
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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