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  • Divergent Reports

    Hello all,

    This is my first post here and I was wondering if you could help me out.

    Ive just bought a Yoga 7i laptop from Lenovo and Ive decided to run memtest86 to check the memory because its soldered to the motherboard.

    Ive ran a 10-pass test and it passed without any issues, but I had to get a replacement due screen issues.

    The replacement arrived an Ive noticed that sometimes things were taking more time than usual to open and Lenovo app froze for a couple seconds when I was trying to adjust it.

    I thought it was odd and decided to run memtest86 again and sure enough an error showed up. Actually two errors on "Test 7 - Moving Inversions".

    So, Ive stopeed the test and restarted all over again running the exact same 10-pass test and this time no errors were found.

    Which test should I believe?

    Is there any aditional testing I can run to make sure my system is good?

    Should I update the Bios or something?

    Im still in the return window and I dont want to get a third replacement unless I have to but at the same time I dont want a defect ram soldered to the motherboard.

    Ive attached both reports to this post.

    Any advice is greatly appreciated.

    Do I have a defect ram or not? What would you do if you were me?

    FIRST REPORT:

    Summary
    Report Date 2021-10-26 05:32:58
    Generated by MemTest86 V8.0 Pro (64-bit)
    Result FAIL
    System Information
    EFI Specifications 2.70
    System
    Manufacturer LENOVO
    Product Name 82LW
    Version Yoga 7 14ITL5
    Serial Number
    BIOS
    Vendor LENOVO
    Version F5CN40WW
    Release Date 01/14/2021
    Baseboard
    Manufacturer LENOVO
    Product Name LNVNB161216
    Version SDK0J40688 WIN
    Serial Number
    CPU Type 11th Gen Intel Core i7-1165G7 @ 2.80GHz
    CPU Clock 4098 MHz
    # Logical Processors 8 (4 enabled for testing)
    L1 Cache 4 x 80K (396551 MB/s)
    L2 Cache 4 x 1280K (106657 MB/s)
    L3 Cache 12288K (52947 MB/s)
    Memory 8006M (26753 MB/s)
    DIMM Slot #0 4GB DDR4 PC4-25600
    Micron Technology / 4ATF51264HZ-3G2J1
    3200 MHz
    DIMM Slot #1 4GB DDR4 PC4-25600
    Micron Technology / 4ATF51264HZ-3G2J1
    3200 MHz
    Result summary
    Test Start Time 2021-10-26 01:07:43
    Elapsed Time 4:24:58
    Memory Range Tested 0x0 - 2B0C00000 (11020MB)
    CPU Selection Mode Parallel (All CPUs)
    ECC Polling Enabled
    # Tests Passed 133/134 (99%)
    Lowest Error Address 0x1F84FA97C (8068MB)
    Highest Error Address 0x1F84FA97C (8068MB)
    Bits in Error Mask 0000000000004000
    Bits in Error 1
    Max Contiguous Errors 1
    Test # Tests Passed Errors
    Test 0 [Address test, walking ones, 1 CPU] 10/10 (100%) 0
    Test 1 [Address test, own address, 1 CPU] 10/10 (100%) 0
    Test 2 [Address test, own address] 10/10 (100%) 0
    Test 3 [Moving inversions, ones & zeroes] 10/10 (100%) 0
    Test 4 [Moving inversions, 8-bit pattern] 10/10 (100%) 0
    Test 5 [Moving inversions, random pattern] 10/10 (100%) 0
    Test 6 [Block move, 64-byte blocks] 10/10 (100%) 0
    Test 7 [Moving inversions, 32-bit pattern] 9/10 (90%) 2
    Test 8 [Random number sequence] 9/9 (100%) 0
    Test 9 [Modulo 20, ones & zeros] 9/9 (100%) 0
    Test 10 [Bit fade test, 2 patterns, 1 CPU] 9/9 (100%) 0
    Test 11 [Random number sequence, 64-bit] 9/9 (100%) 0
    Test 12 [Random number sequence, 128-bit] 9/9 (100%) 0
    Test 13 [Hammer test] 9/9 (100%) 0
    Last 10 Errors
    2021-10-26 05:29:38 - [Data Error] Test: 7, CPU: 6, Address: 1F84FA97C, Expected: 7FFFFFFF, Actual: 7FFFBFFF

    SECOND REPORT

    Summary
    Report Date 2021-10-26 10:58:30
    Generated by MemTest86 V8.0 Pro (64-bit)
    Result PASS
    System Information
    EFI Specifications 2.70
    System
    Manufacturer LENOVO
    Product Name 82LW
    Version Yoga 7 14ITL5
    Serial Number
    BIOS
    Vendor LENOVO
    Version F5CN40WW
    Release Date 01/14/2021
    Baseboard
    Manufacturer LENOVO
    Product Name LNVNB161216
    Version SDK0J40688 WIN
    Serial Number
    CPU Type 11th Gen Intel Core i7-1165G7 @ 2.80GHz
    CPU Clock 4099 MHz
    # Logical Processors 8 (4 enabled for testing)
    L1 Cache 4 x 80K (396552 MB/s)
    L2 Cache 4 x 1280K (102753 MB/s)
    L3 Cache 12288K (52893 MB/s)
    Memory 8006M (26812 MB/s)
    DIMM Slot #0 4GB DDR4 PC4-25600
    Micron Technology / 4ATF51264HZ-3G2J1
    3200 MHz
    DIMM Slot #1 4GB DDR4 PC4-25600
    Micron Technology / 4ATF51264HZ-3G2J1
    3200 MHz
    Result summary
    Test Start Time 2021-10-26 06:06:34
    Elapsed Time 4:44:19
    Memory Range Tested 0x0 - 2B0C00000 (11020MB)
    CPU Selection Mode Parallel (All CPUs)
    ECC Polling Enabled
    # Tests Passed 140/140 (100%)
    Test # Tests Passed Errors
    Test 0 [Address test, walking ones, 1 CPU] 10/10 (100%) 0
    Test 1 [Address test, own address, 1 CPU] 10/10 (100%) 0
    Test 2 [Address test, own address] 10/10 (100%) 0
    Test 3 [Moving inversions, ones & zeroes] 10/10 (100%) 0
    Test 4 [Moving inversions, 8-bit pattern] 10/10 (100%) 0
    Test 5 [Moving inversions, random pattern] 10/10 (100%) 0
    Test 6 [Block move, 64-byte blocks] 10/10 (100%) 0
    Test 7 [Moving inversions, 32-bit pattern] 10/10 (100%) 0
    Test 8 [Random number sequence] 10/10 (100%) 0
    Test 9 [Modulo 20, ones & zeros] 10/10 (100%) 0
    Test 10 [Bit fade test, 2 patterns, 1 CPU] 10/10 (100%) 0
    Test 11 [Random number sequence, 64-bit] 10/10 (100%) 0
    Test 12 [Random number sequence, 128-bit] 10/10 (100%) 0
    Test 13 [Hammer test] 10/10 (100%) 0

    Thank you!

  • #2
    Likely the RAM is bad, intermittent errors are still valid.

    For more on troubleshooting:
    https://www.memtest86.com/troubleshooting.htm

    Comment


    • #3
      Originally posted by Simon View Post
      Likely the RAM is bad, intermittent errors are still valid.

      For more on troubleshooting:
      https://www.memtest86.com/troubleshooting.htm
      Thank you for the quick reply.

      I’ve just discovered that the flash drive I was running the memtest86 was defective. But the program loaded without issues.

      So, I’ve replaced for a new flash drive and 10 hours in and zero errors.

      Could be the flash drive the culprit?

      Thank you.

      Comment


      • #4
        Could be the flash drive the culprit?
        Very unlikley.
        Intermittently bad RAM is more likley

        Comment

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