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P35-DS3R shows only half RAM anymore

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  • P35-DS3R shows only half RAM anymore

    Hello guys and girls,
    maybe you can help me with a problem.

    On my P35-DS3R Rev A2 (shown in CPU-Z) I have installed 4 GB of RAM (2x2GB) and in the beginning last Oktober it showed them completely, but a few days ago I found out it recognizes only 2 Gigs anymore (in the BIOS itself).
    I can't say when that "switching" happened.

    The board was delivered with some BIOS lower than F6. I upgraded it to F6, it might be possible that it "lost" the 2 Gigs by then. It shows both Modules as 1GB now each.

    System Configuration:
    MB: P35-DS3R Rev.A2 (F11)
    CPU: Intel Q6600 B3
    RAM: MDT 2x2GB DD2-800 DIMM-Kit (1.8V)
    PSU: be quiet! straight power 600W Quad Rail
    HDD: Samsung Spinpoints SATA2 400GB + 200GB
    OS: Vista Busi. 64bit + XP Prof. 32bit

    What I tried already to solve the problem:
    Updated to F11. (Yes, I loaded BIOS failsave defaults, saved and restarted, aswell as optimized configuration, which had both no effect on detection).
    Switched Banks (instead of 1 and 3 to 2 and 4, dual channel works on both configurations).

    I didn't find anybody who had tha same problem (first recognizing the memory and then loosing half of it). I think that might have happened when I upgraded the BIOS first time to F6...
    Anyone an idea what I could do to solve the problem?
    Thanks is advance.


    Revision of Mainboard is 1.0
    Looked it up on the MB itself.

    Cleared CMOS
    Removed Battery for a minute
    Afterwards only put in one module
    Still no change... Only 1GB per Module recognized...
    Last edited by T3quila; 01-20-2008, 11:10 PM.

  • #2
    Re: P35-DS3R shows only half RAM anymore

    Memory issue?