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What do the Syndrome codes mean?

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  • What do the Syndrome codes mean?

    What do "Syndrome: 0064" and "Syndrome: 0085" mean in the MemTest logfiles?
    Where can I find the list of all possible "Syndrome" codes and their meaning?

  • #2
    See the ECC technical details page for information on syndrome.

    From that page:
    "The ECC verification step, using a parity-check matrix, generates a value called a syndrome. If the syndrome is zero, no error occurred. Otherwise, it is used to index a lookup table called the syndrome table to identifying the bits in error (if correctable), or otherwise determine if the error is uncorrectable.​"

    After decoding, it tells you which bit in the parity byte was detected as being bad. Generally not super useful, as most people only care that the RAM is bad and finding out which exact bit went bad doesn't really matter.

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