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Thread: Memtest86+ v.4.2 skipping last GB of ram?




  1. #11
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    Default Re: Memtest86+ v.4.2 skipping last GB of ram?

    Quote Originally Posted by profJim View Post
    My own video proves me wrong
    The message flashes very quickly just as the test memory address range changes from "184 - 2048" to "2048 - 3583".
    If you're gonna be that picky, you should be an assembly language programmer.

    With 8gb of ram, the memory address test ranges are:
    _184 - 2048
    2048 - 3583
    4096 - 6144
    6144 - 8192
    8192 - 8704

    note:
    4096 minus 3583 = 513
    8704 minus 8192 = 512

    I'll leave it to an Intel memory specialist to explain why it works this way.
    I'm confident that Memtest86+ is testing all available memory.
    Hehe. But the problem with mine is that it "relocated" a whole lot of memory.
    It goes from 0-2gb to 4-6gb. It skips over 2-4gb really quickly (that's when it flashes "relocated").
    I am just worried that that is where all the bad sectors are and the computer automatically skips that portion because it already knows it's bad.
    Then I would effectively be using 14gb of RAM instead of 16gb.
    Even though 14gb is PLENTY, I paid for 16gb and I am determined to get my money's worth!!! lol
    Well, I filed for RMA with newegg and I will run the test with fresh set of RAM and see what happens.

  2. #12
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    Default Re: Memtest86+ v.4.2 skipping last GB of ram?

    Skipping memory as you've described is a problem.
    Was your system running at stock settings when you were testing.
    Usually, if there is a dead memory module or a bad memory slot, the system won't boot or will freeze during the post process.
    It would be interesting to see what happens when running the windows memory diagnostic program from a bootable floppy or usb drive.
    The are also some live Linux packages with memory diagnostic software that you can burn to an optical drive to test your hardware.

    If you have a problem with your new memory, create your own thread and be sure to create a detailed hardware list in your forum signature.
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  3. #13
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    Default Re: Memtest86+ v.4.2 skipping last GB of ram?

    Quote Originally Posted by profJim View Post
    @Iskaryotes
    If you are using the older Memtest, version 3.x program instead of using the Memtest86+ program, your problem is due to a bug in the older, original version that hasn't been upgraded for quite a while.
    I've never seen flashing "relocated" message using Memtest86+.
    We don't know anything about your computer hardware, so we can't advise you further.
    Sorry to correct this, and not trying to single you out because I've seen several admins say the exact same thing, however we need to stop telling everyone that "memtest86" is the older version that has not been updated for awhile. It was indeed the case for awhile, but that has changed.

    That's exactly what got me. On top of the fact that if you search "best memory testers" you get some guy on "pcsupport.about.com" that has no time/date stamp (that drives me nuts about this stie), and the #1 recommendation is memtest86. Memtest86+ is 4th on his list because "it's identical to memtest86, and it would be like running the same program twice". So to those looking for the latest info (like myself) or people brand new to this, they wouldn't know. And I know about how memtest86+ was a fork from the original memtest86, and now seems both forks are being worked. :/

    Couple that with the fact that:
    MEMTEST86:
    Version 4.0a (Released 20-Aug-2011)
    • Multi-threaded with up to 16 Cores
    • Tests Up to 64 GB of memory
    MEMTEST86+:
    ** Memtest86+ V4.20 (25/01/2011) **
    • Download - Pre-Compiled Bootable ISO (.gz)
    • Download - Pre-Compiled Bootable ISO (.zip)
    You think you are making the better choice since MEMTEST86 is more recent.

    Of course what you don't realize is that Memtest86 despite being more recent, does not seem as stable. So in any case, I completely agree that I won't be using the original for awhile, just if I go by release dates alone, won't make the correct choice.

    Cheers.
    Last edited by ped; 02-11-2012 at 04:38 PM.

  4. #14
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    Default Re: Memtest86+ v.4.2 skipping last GB of ram?

    Quote Originally Posted by profJim View Post
    You can download and view a short 39 second Memtest86+ v4.20 video that shows the typical memory range "skipping" with 4GB of more of memory on my P35-DS3L system.
    http://www.mediafire.com/download.php?2cktvscgtz0udkb

    You should stress test your system using Prime95 and/or HCI Memtest.
    With Prime95 I suggest running each of the tests (Blend, Small FFT, and Large FFT) for at least 6 - 12 hours or more. Longer tests are better.
    Download links are in the http://forums.tweaktown.com/gigabyte...ity-tools.html thread.
    Ok thanks mucho. Will check that forum and go next.

    So Prime95 is used also to just test memory performance, or is that more of the stability aspect? Would for example Prime95 potentially uncover memory problems?

    And thanks much to confirm that HCI memtest is a good follow-up. If there any tips, most appreciated if they could be past along. Meanwhile I'll look at the forum post.

    Thanks to everyone who helped clarify the skipping problem! Seems to be no issue, and simply part of how the addressing works!

    Cheers everyone.

  5. #15
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    Default Re: Memtest86+ v.4.2 skipping last GB of ram?

    Sorry, I never had time to test yet, but sounds like I may not need to now right?

    @ Iskaryotes, is all of your memory showing correctly in system properties, and in Task Manager / Performance Tab (Physical Memory Total)?

    You are correct Ped! It's finally been updated, I will however still be using and advising 86+ most likely, but I will check out the updated 86

  6. #16
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    Default Re: Memtest86+ v.4.2 skipping last GB of ram?

    Thanks for the update, I wasn't aware that the original Memtest has finally been updated.

    FWIW, HCI Memtest is a windows program, where you run several simultaneous instances depending upon how much memory you have installed.

    My preference is to run Memtest86+ initially with brand new memory or when I'm overclocking on the "ragged edge", but it isn't a stress test in the normal sense.
    Memtest86+ will often run error free for many hours, but HCI Memtest or Prime95 can and will often generate errors if your bios settings aren't okie-dokie.
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  7. #17
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    Default Re: Memtest86+ v.4.2 skipping last GB of ram?

    Quote Originally Posted by Lsdmeasap View Post
    You are correct Ped! It's finally been updated, I will however still be using and advising 86+ most likely, but I will check out the updated 86
    Oh geez, let me tell you. I did use the memtest86 originally and I completely freaked out that my motherboard had gone bonkers because 1/2 way through the test it spit up garbage.

    That's when I got recommended to try memtest86+ and was much more reassured.

    However I will indeed download the prime95/HCI memtest and run those, I really do think that the original is bugged for sandy bridge architectures.

    OR... maybe my machine really does have some problems... but assuredly they need to work out some bugs.

    Cheers.

  8. #18
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    Default Re: Memtest86+ v.4.2 skipping last GB of ram?

    You can click on the Prime95 tutorial link in my sig, just make sure that you have "round off checking" enabled before you start the test.
    Prime95 puts your cpu and memory subsystem through a high stress workout, but with a "mostly" stable system, each of the three tests should be run for at least 6 - 10 hours or more. If a single error occurs, stop the test, as your system isn't stable. When reporting Prime95 errors, tell us which test was run, how long the test ran, and which FFT value failed.

    I once ran HCI Memtest for several hours and the results were identical to my three 10+ hour Prime95 tests; no errors.

    Running only 5 - 10 loops with LinX or IBT (IntelBurnTest) is often a good quick and dirty preliminary stress test.
    We will report you to the SPCC (society for the prevention of cruelty to cpu's) if you run more than 10 loops :)
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  9. #19
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    Default Re: Memtest86+ v.4.2 skipping last GB of ram?

    HCI is a great tool! I always use HCI memtest x 4-6 windows (Depending on CPU core count) @ 600-800MB memory or more depending on how much installed, I use that in memory and motherboard reviews, along with 5-10 passes of LinX too

  10. #20
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    Default Re: Memtest86+ v.4.2 skipping last GB of ram?

    Quote Originally Posted by profJim View Post
    You can click on the Prime95 tutorial link in my sig, just make sure that you have "round off checking" enabled before you start the test.
    Prime95 puts your cpu and memory subsystem through a high stress workout, but with a "mostly" stable system, each of the three tests should be run for at least 6 - 10 hours or more. If a single error occurs, stop the test, as your system isn't stable. When reporting Prime95 errors, tell us which test was run, how long the test ran, and which FFT value failed.

    I once ran HCI Memtest for several hours and the results were identical to my three 10+ hour Prime95 tests; no errors.

    Running only 5 - 10 loops with LinX or IBT (IntelBurnTest) is often a good quick and dirty preliminary stress test.
    We will report you to the SPCC (society for the prevention of cruelty to cpu's) if you run more than 10 loops :)
    Well I don't know if it's the appropriate thread anymore, however I just ran 130% coverage on HCI Memtest with no errors. Ran Prime95 for 6 hours on blend with no errors either. Then I ran OCCT for the GPU, and voila... ran for about 10 minutes at 230+ fps, then dropped to 40... along with a smorgasbord full of errors.

    So there's definitely something up. I will use the "rounding check" point you mentione and now start with the Large FFTs (will go backwards) and see what I come up with.

    I guess I'm glad to know that my intuition was correct... however it's always nice to be proven wrong in these cases.

    Or maybe I'll see if I can stay within the SPCC guidelines and just go right to LinX :), as now I'm wondering if the GPU issue is related to the CPU. Guess this isn't a test I run just before going to bed, eh? :D

    Cheers all!
    Last edited by ped; 02-12-2012 at 03:35 AM. Reason: can't spell to save my life

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