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Thread: Memtest report

  1. #1
    Memtest report

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    Memtest report
    Due to frequent shutdowns that have been associated with hardware issues (covered under a separate thread), I decided to run Memtest to check my RAM.

    I have a total of 5 GB RAM (2 x 512MB + 2 x 2GB). The suspicion I have is that the original, 512 is at a 4200 speed, while the added, 2 GB are rated by my Mac's System Profiler as 3200.

    Also, I did a regular restart before running Memtest (via the Terminal), because when trying to start up as single-user (Command-S) I got a DOS-like screen that was not at all clear to me....

    Here is the report, and I would greatly appreciate getting a feedback, telling me if all OK, or are there any issues with my RAM:

    Last login: Fri Oct 19 17:33:46 on console
    (my name)s-power-mac-g5:~ Ami$ memtest all 2

    Memtest version 4.22 (64-bit)
    Copyright (C) 2004 Charles Cazabon
    Copyright (C) 2004-2008 Tony Scaminaci (Macintosh port)
    Licensed under the GNU General Public License version 2 only

    Mac OS X 10.5.8 (9L31a) running in multiuser mode
    Memory Page Size: 4096
    System has 2 PPC processors(s) with Altivec
    Requested memory: 4531MB (4752113664 bytes)
    Available memory: 4531MB (4752113664 bytes)
    Allocated memory: 4531MB (4752113664 bytes) at local address 0x0000000001000000
    Attempting memory lock... ERROR: Memory lock failed - reason unknown.

    WARNING: Testing with unlocked memory may be slower and less reliable

    Partitioning memory into 2 comparison buffers...
    Buffer A: 2265MB (2376056832 bytes) starts at local address 0x0000000001000000
    Buffer B: 2265MB (2376056832 bytes) starts at local address 0x000000008e9fc000

    Running 2 test sequences... (CTRL-C to quit)

    Test sequence 1 of 2:

    Running tests on full 4531MB region...
    Stuck Address : ok
    Linear PRN : ok
    Running comparison tests using 2265MB buffers...
    Random Value : ok
    Compare XOR : ok
    Compare SUB : ok
    Compare MUL : ok
    Compare DIV : ok
    Compare OR : ok
    Compare AND : ok
    Sequential Increment: ok
    Solid Bits : ok
    Block Sequential : ok
    Checkerboard : ok
    Bit Spread : ok
    Bit Flip : ok
    Walking Ones : ok
    Walking Zeroes : ok

    Test sequence 2 of 2:

    Running tests on full 4531MB region...
    Stuck Address : ok
    Linear PRN : ok
    Running comparison tests using 2265MB buffers...
    Random Value : ok
    Compare XOR : ok
    Compare SUB : ok
    Compare MUL : ok
    Compare DIV : ok
    Compare OR : ok
    Compare AND : ok
    Sequential Increment: ok
    Solid Bits : ok
    Block Sequential : ok
    Checkerboard : ok
    Bit Spread : ok
    Bit Flip : ok
    Walking Ones : ok
    Walking Zeroes : ok

    All tests passed! Execution time: 15404 seconds.

  2. #2
    Memtest report
    bobtomay's Avatar
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    Based solely on that report, there is nothing wrong with your memory.

    From my teeny bit of understanding - Memtest cannot lock greater than 4GB of memory on a 32 bit machine. That would be a standard error.
    I cannot be held responsible for the things that come out of my mouth.
    In the Windows world, most everything folks don't understand is called a virus.

  3. #3
    Memtest report

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    So this has nothing to do with me not starting up in Single-User mode?

    And the fact my basic DIMMS are at 4200 speed, while the added 4GB DIMMS are at 3200 does not indicate any problem in the report?

  4. #4
    Memtest report
    bobtomay's Avatar
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    Not when we have no idea which and what the specs are for the sticks you have in the machine.
    I cannot be held responsible for the things that come out of my mouth.
    In the Windows world, most everything folks don't understand is called a virus.

  5. #5
    Memtest report
    pigoo3's Avatar
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    Quote Originally Posted by Mamamia View Post
    So this has nothing to do with me not starting up in Single-User mode?

    And the fact my basic DIMMS are at 4200 speed, while the added 4GB DIMMS are at 3200 does not indicate any problem in the report?
    It would be nice to know the exact model Macintosh we are talking about…so that we can check exactly what ram should be in it.

    - Nick
    - Too many "beachballs", read this: Beachballs
    - Computer seems slower than it used to? Read this for some slow computer tips: Speedup
    - Almost full hard drive? Some solutions. Out of Space
    - Apple Battery Info. Battery

  6. #6
    Memtest report
    bobtomay's Avatar
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    15" MBP '06 2.33 C2D 4GB 10.7; 13" MBA '11 1.8 i7 4GB 10.10; 21" iMac '13 2.9 i5 8GB 10.10; 5s & 5c
    ^^ That also - Nick will be much more familiar with the PPC Macs than I.


    I'm an Intel Mac baby.
    I cannot be held responsible for the things that come out of my mouth.
    In the Windows world, most everything folks don't understand is called a virus.

  7. #7
    Memtest report

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    Sorry, and thanks for inquiring:

    PowerMac G5 "Late 2005"

  8. #8
    Memtest report
    pigoo3's Avatar
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    Quote Originally Posted by Mamamia View Post
    Sorry, and thanks for inquiring:

    PowerMac G5 "Late 2005"
    Thanks for the info. Three Powermac G5's would fall into that category…but it does narrow things down quite a bit.

    If this Powermac G5 truly is a "Late 2005" model…it's only supposed to be using PC-4200 ram. The prior Powermac G5 generation used PC-3200.

    Powermac G5's can be pretty sensitive to what ram is used in them…and in this case it's even more important to use the correct ram…because the "Late 2005" Powermac G5's is when the processor design went from a "dual-cpu" setup to a "dual-core" setup (for the 2-cpu models…there was a quad-core as well).

    Long story short…I would remove the 4gig of PC-3200 ram…and only install PC-4200. And that's PC-4200 ram that is also guaranteed to be Macintosh compatible…which the folks at OWC and Crucial sell.

    HTH,

    - Nick
    - Too many "beachballs", read this: Beachballs
    - Computer seems slower than it used to? Read this for some slow computer tips: Speedup
    - Almost full hard drive? Some solutions. Out of Space
    - Apple Battery Info. Battery

  9. #9
    Memtest report

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    Thanks, Nick. I think I will have a little discussion with Crucial on Monday.... And I will order the 2 x 2GB 4200 from OWC.

  10. #10
    Memtest report
    pigoo3's Avatar
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    Quote Originally Posted by Mamamia View Post
    Thanks, Nick. I think I will have a little discussion with Crucial on Monday.... And I will order the 2 x 2GB 4200 from OWC.
    How is Crucial related to this conversation (I don't recall Crucial mentioned earlier in this thread)?

    - Nick
    - Too many "beachballs", read this: Beachballs
    - Computer seems slower than it used to? Read this for some slow computer tips: Speedup
    - Almost full hard drive? Some solutions. Out of Space
    - Apple Battery Info. Battery

  11. #11
    Memtest report

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    The 2 x 2GB DIMMS were sold to me by Crucial, 3 years ago. They claimed at that time (and still claiming) that 4200 was/is no longer available, and 3200 should work fine... Which they did, so far... After upgrading from Tiger to Leopard I've been having frequent crashes (covered under a separate thread), that apparently were hardware-related, and one of the suspicions was my RAM. That's why it was important for me to test the RAM.

  12. #12
    Memtest report
    pigoo3's Avatar
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    Quote Originally Posted by Mamamia View Post
    The 2 x 2GB DIMMS were sold to me by Crucial, 3 years ago. They claimed at that time (and still claiming) that 4200 was/is no longer available, and 3200 should work fine... Which they did, so far... After upgrading from Tiger to Leopard I've been having frequent crashes (covered under a separate thread), that apparently were hardware-related, and one of the suspicions was my RAM. That's why it was important for me to test the RAM.
    Ooh…I see. But 3 years ago?? Are you saying that this computer was working fine for the past 3 years with the 4 gig of PC-3200 ram in it? Has this computer always had (or at least the last 3 years)…had the same ram configuration as mentioned in the beginning of this thread (4 gig of PC-3200, and 1gig of PC-4200)?

    - Nick
    - Too many "beachballs", read this: Beachballs
    - Computer seems slower than it used to? Read this for some slow computer tips: Speedup
    - Almost full hard drive? Some solutions. Out of Space
    - Apple Battery Info. Battery

  13. #13
    Memtest report

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    Yes.... But most of those 3 years I was running Tiger, 10.4.11... Few months ago I upgraded to Leopard, 10.5.8. Soon after I started getting those fans blowing loud and the Mac down, and always around midnight, with the red LED #7 glowing.

    What I've done couple days ago was (A) swapping the placement of the DIMMS, because I found out the inward slots were occupied by the new 2GB DIMMS, while the original 512MB DIMMS were outward, which was wrong, and (B) I reset the SMU button. Since then my Mac has been behaving OK, no crashes at night....

    SO I'M GUESSING THAT THE WRONG SPEED ISSUE WAS NOT THE CAUSE OF MY TROUBLE (but I still think I should challenge Crucial, and buy the 4200 from OWC).

    ...Go figure....

  14. #14
    Memtest report
    pigoo3's Avatar
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    Quote Originally Posted by Mamamia View Post
    Yes.... But most of those 3 years I was running Tiger, 10.4.11... Few months ago I upgraded to Leopard, 10.5.8. Soon after I started getting those fans blowing loud and the Mac down, and always around midnight, with the red LED #7 glowing.

    What I've done couple days ago was (A) swapping the placement of the DIMMS, because I found out the inward slots were occupied by the new 2GB DIMMS, while the original 512MB DIMMS were outward, which was wrong, and (B) I reset the SMU button. Since then my Mac has been behaving OK, no crashes at night….
    Ok…more info means more questions.

    1. After the ram was swapped into the correct slots…you mentioned that the computer was/is "behaving ok". What do you mean…no crashes at all…or not as many?

    2. After the ram was swapped into the correct slots…is LED #7 still lit?

    - Nick
    - Too many "beachballs", read this: Beachballs
    - Computer seems slower than it used to? Read this for some slow computer tips: Speedup
    - Almost full hard drive? Some solutions. Out of Space
    - Apple Battery Info. Battery

  15. #15
    Memtest report

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    Since I swapped the DIMMS and reset the SMU we passed 2 "quiet" nights w/o the typical crashes, that were defined by blank screen, fans blowing and red LED #7 glowing.... So I'm GUESSING / HOPING that the issue has been resolved....

    What can I say beyond that? I don't know, maybe come next week it will start all over again... I'm willing to spend the $70 and get myself OWC's 4200 DIMMS, though, so to prevent ANY EXCUSE for my Mac to behave badly....

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