Heat causing errors in Memtest 86+?

Discussion in 'Memory' started by Synomenon, Jul 29, 2010.

  1. Synomenon

    Synomenon [H]ardness Supreme

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    Been running Memtest86+ v4.10 on my laptop. Ran it overnight the night before last. When I got up the next morning, it showed one error from the first pass.

    Turned the laptop off and left it for a couple of hours. After that couple of hours, I turned it on again and tried running Memtest86+ again. This time after only 14 minutes it showed 22 errors.

    I turned the laptop off again and picked it up. The underside was very hot. I waited again for a couple of hours then put it on one of those cooling pads to help it cool down while trying Memtest86+ again. Ran it again for 26 hours and this time there were 7 errors:

    Intel Core 2 1297 MHz
    L1 Cache: 32K 18264 MB/s
    L2 Cache: 3072K 8475 MB/s
    L3 Cache: None
    Memory: 8095M 2881MB/s
    Chipset: Intel PM/GM45/47 (ECC: Disabled) - FSB: 199MHz - Type: DDR-II
    Settings: RAM: 399MHz (DDR798) / CAS: 6-6-6-18 / Dual Channel

    WallTime____Cached____RsvdMem____MemMap____Cache____ECC____Test____Pass____Errors____ECC Errs
    26:16:50--------8095M--------252K--------------e820--------------on------------off-----------Stdd-------7-------------7---------------0

    Error Confidence Value: 222
    Lowest Error Address: 000b9c67350 - 2972.4MB
    Highest Error Address: 000b9c67350 - 2972.4MB
    Bits in Error Mask: 00400000
    Bits in Error - Total: 1 Min: 1 Max: 1 Avg: 1
    Max Contiguous Errors: 1
    ECC Correctable Errors:
    Errors per Memory Slot:
    Code:
    0: 1       4: 0       8: 0       12: 0
    1: 1       5: 0       9: 0       13: 0
    2: 0       6: 0       10: 0      14: 0
    3: 0       7: 0       11: 0      15: 0
    Code:
    Test         Errors
    -----------------------
    0            0
    1            0
    2            0
    3            0
    4            2
    5            0
    6            0
    7            0
    8            0
    9            0
    Could these errors be caused by too much heat?



    I'm currently running HCi Memtest Deluxe v4 (the part of it that runs in Windows) and so far it has not found any errors. This app. though does not check all memory since it can't check the memory being used by the OS/system.

    It comes with a bootable component that looks like it's similar to Memtest86+, but I haven't tried that bootable component yet.


    ==============
    Update 1:
    Ok, just tested stick 1 in slot 1 for 6 hours / 3 passes. No errors found.

    Used Memtest86+ v4.10 again for this test.

    ==============
    Update 2:
    Tested stick 2 in slot 1 for 7 hours / 4 passes. No errors found.

    Used Memtest86+ v4.10 for this test. Two more test sessions to go (stick 1 in slot 2 and stick 2 in slot 2).

    ==============
    Update 3:
    Ok, just tested stick 1 in slot 2 for 11 hours / 6 passes. No errors found.

    Used Memtest86+ v4.10 again for this test.

    ==============
    Update 4:
    Tested stick 2 in slot 2 for 6 hours, 30 minutes / 4 passes. No errors found.

    Used Memtest86+ v4.10

    ==============
    Update 5:
    Tested a new set of RAM (also 8GB - two 4GB sticks) for 27 hours and 10 minutes / 8 passes. No errors.

    Used Memtest86+ v4.10

    ==============
    Update 6:
    Tested the new set of RAM with HCi Memtest Deluxe. 205 percent coverage on all the RAM. 0 errors.


    I think the errors before were just from the first set of RAM. I only had errors when both sticks from that first set were in at the same time.
     
    Last edited: Aug 2, 2010
  2. Synomenon

    Synomenon [H]ardness Supreme

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    Just finished testing the RAM with HCi Memtest Deluxe v4.0.

    The test ran for 20 hours and reached 201% coverage. 0 errors found.


    HCi Memtest runs in Windows so it can't check the memory that the OS / system uses. I've read though that it stresses the system more than Memtest86+ does.

    Don't know what to think now. Is the RAM bad or not? Are the errors being caused by heat produced when running the tests?
     
  3. Synomenon

    Synomenon [H]ardness Supreme

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    Ok, not knowing what to do next I'm going to try testing each stick, one-by-one.

    Should I test each stick in both slots (say six hours in each slot):

    - Stick 1 in slot 1 for 6 hours, then stick 1 in slot 2 for 6 hours.
    - Stick 2 in slot 1 for 6 hours, then stick 2 in slot 2 for 6 hours.

    ?

    Or is it good enough to test stick 1 in slot 1 overnight then stick 2 in slot 2 the next night?
     
    Last edited: Jul 29, 2010
  4. Synomenon

    Synomenon [H]ardness Supreme

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    Ok, just tested stick 1 in slot 1 for 6 hours / 3 passes. No errors found.

    Used Memtest86+ v4.10 again for this test.
     
  5. Synomenon

    Synomenon [H]ardness Supreme

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    dp.
     
    Last edited: Jul 30, 2010
  6. Synomenon

    Synomenon [H]ardness Supreme

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    Tested stick 2 in slot 1 for 7 hours / 4 passes. No errors found.

    Used Memtest86+ v4.10 for this test. Two more test sessions to go (stick 1 in slot 2 and stick 2 in slot 2).
     
  7. ghost6303

    ghost6303 2[H]4U

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    memtest doesnt necessarily mean there is a physical problem with your RAM. an error means that a computation wasnt done correctly. in every computer system ever made, there is always a very small percent of calculations that come back with erroneous data at one time or another. usually the user is never even aware of this because the computer throws the data out and recomputes it.

    it is entirely possible that the errors were due to heat, as electron migration and current leakage within circuits increases with heat and and usage. its also possible that it isnt the memory at all that is bad, it could be the memory controler, northbridge, or anywhere else that the data had to pass thru to get to memtest.

    if after your next two tests, you dont get any errors, i would run something like prime95 or orthos everest and stress the CPU and the rest of the system and see if you get any errors. this is hard to do on a laptop because they overheat so easily, its hard to tell if its heat related or a hardware issue, because they will always be hot.

    and youve taken double posting to a whole new level. congrats.;)
     
  8. Synomenon

    Synomenon [H]ardness Supreme

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    Hehe. I don't consider it double posting unless the posts are all in the same forum. :p
     
  9. Synomenon

    Synomenon [H]ardness Supreme

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    Ok, just tested stick 1 in slot 2 for 11 hours / 6 passes. No errors found.

    Used Memtest86+ v4.10 again for this test.
     
  10. Synomenon

    Synomenon [H]ardness Supreme

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    Tested stick 2 in slot 2 for 6 hours, 30 minutes / 4 passes. No errors found.

    Used Memtest86+ v4.10.



    I guess I'll just chalk up those errors from the early tests to anomalies.
     
  11. Synomenon

    Synomenon [H]ardness Supreme

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    Update 5:
    Tested a new set of RAM (also 8GB - two 4GB sticks) for 27 hours and 10 minutes / 8 passes. No errors.

    Used Memtest86+ v4.10
     
  12. Synomenon

    Synomenon [H]ardness Supreme

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    Update 6:
    Tested the new set of RAM with HCi Memtest Deluxe. 205 percent coverage on all the RAM. 0 errors.


    I think the errors before were just from the first set of RAM. I only had errors when both sticks from that first set were in at the same time.