A8N-SLI Deluxe: Please help with memory issue.

Discussion in 'Asus' started by Chris Hill, Apr 28, 2005.

  1. Chris Hill

    Chris Hill Guest

    Hi
    Recently upgraded to A8N-SLI Deluxe and updated bios to 1007 (beta)
    I have 4x512MB PC3200 DDR RAM Non-Parity CL3 (Crucial)
    The machine posts and runs fine but only recognises 1.5gb memory.
    If I remove 1 stick it posts 1gb.
    All sticks have been checked and work fine.
    Initially, when I got the board it would only post when 1 stick was
    installed until I updated the bios.
    Any ideas to why this is happening.
    Im gonna try the new 1007 final, but until then any help would be
    great.
    Thanx

    System:
    A8n-SLI Deluxe
    4x Crucial 512 PC3200 DDR 400 Unbuffered CL3
    1x Gigabyte GF6600GT
    1x 160gb Samsung SP1614N UDMA133
    Tagen TG480-U01 PSU
     
    Chris Hill, Apr 28, 2005
    #1
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  2. Chris Hill

    Paul Guest

    A dual channel board of that type can run with two sticks
    or four sticks. With three sticks, the motherboard should
    be ignoring one of the sticks, and the discovered 1GB total
    memory seems to point to that happening.

    The real question is, why is the memory not being recognized
    properly with four sticks ?

    At one time, before the invention of the SPD EEPROM chip on
    each DIMM, memory was discovered by brute force. During the
    POST, the processor would do test writes and then attempt
    to read back the data, to figure out how big the memory is.

    With SPD, that should not be necessary.

    Why not try a copy of www.cpuid.com/cpuz.php (free) and try the
    memory tab ? See what is reported for the four DIMM slots.
    This picture shows what the memory tab looks like:

    http://www.ocfaq.com/articlefiles/35/cpuz1.jpg

    Lavalys.com Everest home edition (free) also offers basic
    info on memory:

    http://www.lavalys.com/products/screenshots/he_shots/images/everest_he_shot_02_eng.gif

    HTH,
    Paul
     
    Paul, Apr 28, 2005
    #2
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  3. Chris Hill

    edde Guest

    I think it may have something to do with the memory being single sided, or
    double sided. I can't remember which.
     
    edde, Apr 29, 2005
    #3
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