Give me back my 200 MHz

Discussion in 'Abit' started by Paul, Aug 5, 2004.

  1. Paul

    Paul Guest

    I have a abit NF7-S v2. and 2 sticks of Corsair XMS 256M 3200 CL2, running
    at dual mode, 11X 200 MHz fine. Then I decided to add another 512 M same
    memory to make it 1 G. In the beginning it was fine. CPUZ shows they were
    running at dual mode at timing 2.5, 3, 3, 8. And 3-4 days later the
    Microsoft Flight Simulator started to crash several minutes into the flight.
    When I check the memory I found they were running at 3, 3,3 8 now. When I
    start the Prime 95 torture test it failed right away. Saying a rounding
    problem. I ran memTest 86 all pass. Now I have to lower the FSB to 180 for
    flight simulator not to crash and prime 95 not to throw error message . I
    ran the prime 95 torture test for 20 minutes on all three memory chips
    individually and they all seemed fine without error. It seems that when
    three of them are together they won't work at 200 MHz. but they were all
    rated 3200. I tried to raise the Vdimm all the way up to 2.9 (Utility
    reported 2.99 v) with no luck. Any body have any clue as what is going on.
    Paul, Aug 5, 2004
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  2. Paul

    ICee Guest

    You are limited to a lower memory buss when you have three sticks of
    memory; officially, 166 MHz. Check the spec here:
    ICee, Aug 5, 2004
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  3. Paul

    David Besack Guest

    You are limited to a lower memory buss when you have three sticks of
    Does it matter which slots the 2 DIMMs are in, if you only have 2?

    I get the same problem... one stick of PC3200 RAM in any slot, fine.
    2 sticks in slots 1,2, fine.
    2 sticks in slots 1,3 or 2,3 NOT fine.

    So I'm stuck not using dual channel mode because I get crashes if I do.
    David Besack, Aug 5, 2004
  4. Paul

    ICee Guest

    1&3, or 2&3 is dual channel mode.
    Try increasing Vdimm and/or chipset voltage.
    ICee, Aug 5, 2004
  5. Paul

    - HAL9000 Guest

    Did flight simulator ever work with 3 sticks?

    Did you ever run prim95 and memtest with 3 sticks before the problem?


    Motherboard Help By HAL web site:
    - HAL9000, Aug 5, 2004
  6. Paul

    Paul Guest

    Last night I manually set the timing at 2.5, 3, 3, 11. And was able to run
    torture test for 20 minutes without problem, and was able to play the flight
    simulator game for 20 minutes without crash. Gonna to test it longer tonite.
    I set the memory timing at " Aggressive" before, and the system give me
    3,3,3,8. Tried to set it at " turbo" once but won't boot into windows. So
    far seems this trick worked.
    Paul, Aug 5, 2004
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