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Possible Sequential CPU incompatibility

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  • Possible Sequential CPU incompatibility

    Hi;

    I recently tested my Asus X99-E WS USB/3.1 system (with a Xeon E5-1650 V4), and the default settings (using Memtest 8.3 Pro) passed after running 4 passes. This took about 11 and a half hours on 64 GB of ECC memory.

    For the first time I then tried running the tests with the 'Sequential' CPU option. The system locked up after a minute or two and I needed to reset the system with the hardware reset button.

    I updated to Memtest 8.4 pro with no apparent difference.

    I tried running with the 'Round robin' CPU option and that seemed to work o.k. (at least for the 46 minutes I tried it).

    Does this seem like it would be an incompatibility between my system and Memtest 86 in sequential CPU mode?

    I tried running with the 'Sequential' CPU option and a few different sub-ranges of memory selected in the test setup gui. (Trying to see if this was memory range related).

    Limiting the address range to 0-20 G, 20-40G, 0-30 G,33 G-64 G etc. all seem to fail.

    For some reason, trying 40G-60G runs for at least about 12 minutes (that seemed a lot longer than the cases that hung so I cancelled the test at that point).

    I will attach the zipped log where I tried several different different options. In the interests of time I usually declared victory if a test ran more than 12 minutes, but I ran some tests for longer.

    And, as I said, I was able to run 4 complete passes successfully overnight using the default 'parallel' CPU option.

    Thanks;
    Attached Files

  • #2
    There are a lot of motherboard with UEFI bugs that result in quick system freezes. There is a list here
    https://www.passmark.com/forum/memte...election-modes

    But nearly all the time it is the opposite of what you reported. There is a lockup in multi-threading mode and it works OK in single threading mode.

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    • #3
      > ... in single threading mode.

      Just for completeness sake, I ran a test in 'Single CPU' mode and as one might expect that seemed to work o.k. (for at least the 12 minutes that I waited).

      So far at least, only the 'Sequential' CPU mode experiences a hang.

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