PassMark Software

Announcement

Collapse
No announcement yet.

Errors Found - help understanding what they mean

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • Errors Found - help understanding what they mean

    Hi everyone,

    I have been getting BSOD on my Win7 machine when using Unreal Engine 4.15. I updated UE4 to the latest version about 3 weeks ago and updated my Nvidia drivers as well. Im getting BSOD every time I use UE4 and ONLY when using UE4. Every other program seems to run perfectly fine (including video games that run on Unreal!).

    I used Memtest to look at my RAM and found these errors:



    REPORT BEGIN

    Summary

    Report Date 2017-05-17 07:36:09
    Generated by MemTest86 V7.3 Free (64-bit)
    Result FAIL
    System Information

    EFI Specifications 2.31
    System
    Manufacturer Gigabyte Technology Co., Ltd.
    Product Name Z97-D3H
    Version To be filled by O.E.M.
    Serial Number To be filled by O.E.M.
    BIOS
    Vendor American Megatrends Inc.
    Version F7
    Release Date 06/17/2014
    Baseboard
    Manufacturer Gigabyte Technology Co., Ltd.
    Product Name Z97-D3H-CF
    Version x.x
    Serial Number To be filled by O.E.M.
    CPU Type Intel Core i7-4790K @ 4.00GHz
    CPU Clock 4000 MHz [Turbo: 4200.0 MHz]
    # Logical Processors 8 (4 enabled for testing)
    L1 Cache 4 x 64K (220312 MB/s)
    L2 Cache 4 x 256K (65236 MB/s)
    L3 Cache 8192K (47773 MB/s)
    Memory 16431M (17310 MB/s)
    DIMM Slot #0 8GB DDR3 XMP PC3-14900
    A-DATA Technology / DDR3 1866 / 0000C695
    10-11-10-30 / 1866 MHz / 1.500V
    DIMM Slot #1 8GB DDR3 XMP PC3-14900
    A-DATA Technology / DDR3 1866 / 0000C371
    10-11-10-30 / 1866 MHz / 1.500V
    Result summary

    Test Start Time 2017-05-17 01:15:44
    Elapsed Time 3:39:43
    Memory Range Tested 0x0 - 41F000000 (16880MB)
    CPU Selection Mode Parallel (All CPUs)
    # Tests Passed 34/48 (70%)
    Lowest Error Address 0x14C6EBE88 (5318MB)
    Highest Error Address 0x14E6EC528 (5350MB)
    Bits in Error Mask 0000000000040000
    Bits in Error 1
    Max Contiguous Errors 1
    Test # Tests Passed Errors
    Test 0 [Address test, walking ones, 1 CPU] 4/4 (100%) 0
    Test 1 [Address test, own address, 1 CPU] 4/4 (100%) 0
    Test 2 [Address test, own address] 4/4 (100%) 0
    Test 3 [Moving inversions, ones & zeroes] 3/4 (75%) 1
    Test 4 [Moving inversions, 8-bit pattern] 2/4 (50%) 4
    Test 5 [Moving inversions, random pattern] 1/4 (25%) 6
    Test 6 [Block move, 64-byte blocks] 1/4 (25%) 10
    Test 7 [Moving inversions, 32-bit pattern] 1/4 (25%) 9
    Test 8 [Random number sequence] 2/4 (50%) 3
    Test 9 [Modulo 20, ones & zeros] 4/4 (100%) 0
    Test 10 [Bit fade test, 2 patterns, 1 CPU] 4/4 (100%) 0
    Test 13 [Hammer test] 4/4 (100%) 0
    Last 10 Errors
    [Data Error] Test: 7, CPU: 0, Address: 14E6EBE4C, Expected: BFFFFFFF, Actual: BFFBFFFF
    [Data Error] Test: 6, CPU: 0, Address: 14E6EC4A8, Expected: 7FFBFFFF, Actual: 7FFFFFFF
    [Data Error] Test: 6, CPU: 0, Address: 14E6EBEE8, Expected: FFFBFEFF, Actual: FFFFFEFF
    [Data Error] Test: 6, CPU: 0, Address: 14C6EC4C8, Expected: 7FFBFFFF, Actual: 7FFFFFFF
    [Data Error] Test: 6, CPU: 0, Address: 14C6EBF08, Expected: FFFBFEFF, Actual: FFFFFEFF
    [Data Error] Test: 7, CPU: 0, Address: 14E6EBE4C, Expected: 00040000, Actual: 00000000
    [Data Error] Test: 6, CPU: 0, Address: 14E6EBE68, Expected: FFFBFFBF, Actual: FFFFFFBF
    [Data Error] Test: 6, CPU: 0, Address: 14C6EBE88, Expected: FFFBFFBF, Actual: FFFFFFBF
    [Data Error] Test: 7, CPU: 0, Address: 14E6EBE4C, Expected: FFEFFFFF, Actual: FFEBFFFF
    [Data Error] Test: 6, CPU: 0, Address: 14E6EC528, Expected: FFFBFFFE, Actual: FFFFFFFE
    Test 13 [Hammer test] Warning
    Note: Your RAM may be vulnerable to high frequency row hammer bit flips. However the conditions needed to induce these errors occur only very rarely in normal PC usage, and so this should not be of concern to most users.


    REPORT END


    Does this mean my RAM is broken beyond repair? Do I need to replace all my RAM? Is there a way to fix this issue? How come I only crash when using Unreal and nothing else?


    Thank you in advance for any help I can get with this!


  • #2
    Yes, it looks like bad RAM.
    Sometimes lower the clock rate or increasing voltage levels can hide the problem, but it can't be fixed.
    Probably only 1 stick is bad. Try testing one stick at a time.

    Memory corruption won't always cause a crash. Sometimes the bad bit (as you have a single bit error) of RAM won't be used by the software and sometimes corruption occurs in parts of memory that aren't used for anything critical. e.g. display buffers.

    Comment


    • #3
      Originally posted by David (PassMark) View Post
      Yes, it looks like bad RAM.
      Sometimes lower the clock rate or increasing voltage levels can hide the problem, but it can't be fixed.
      Probably only 1 stick is bad. Try testing one stick at a time.

      Memory corruption won't always cause a crash. Sometimes the bad bit (as you have a single bit error) of RAM won't be used by the software and sometimes corruption occurs in parts of memory that aren't used for anything critical. e.g. display buffers.

      Thanks for the help David!

      I tried looking everywhere on the software but I couldnt find a way to test 1 stick at a time - do I have to physically remove one and test or is there a setting that Im missing?

      Thanks!

      Comment


      • #4
        Yes, you need to physically remove the stick.

        See also this page
        http://www.memtest86.com/troubleshooting.htm

        Comment


        • #5
          Thank you David!

          Comment

          Working...
          X