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Next: Memory allocation
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External
Since: Dec 17, 2007
Posts: 1
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(Msg. 1) Posted: Mon Dec 17, 2007 5:23 pm
Post subject: How long to run Memtest86?
Archived from groups: alt>comp>hardware>pc-homebuilt (more info?)
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While I realize there are better memory test programs than Memtest86,
it's probably the best free one. So, any suggestions on how long or
for how many passes I should run it?
Thanks for your help.
Larc
§§§ - Change planet to earth to reply by email - §§§ |
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External
Since: Nov 21, 2007
Posts: 13
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(Msg. 2) Posted: Mon Dec 17, 2007 5:47 pm
Post subject: Re: How long to run Memtest86? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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On Dec 17, 2:23 pm, larc-n... DeleteThis @saturnlink.net wrote:
> While I realize there are better memory test programs than Memtest86,
> it's probably the best free one. So, any suggestions on how long or
> for how many passes I should run it?
>
> Thanks for your help.
> Larc
>
> §§§ - Change planet to earth to reply by email - §§§
Time spent is completely irrelevant as the amount of testing done
depends on system speed and the size of your memory (half the memory =
twice as much testing per hour). The more memory you need to test, the
more time you have to spend. Thus reliability should be measured
solely in the number of passes, and how many to run depends on what
margin of error you're willing to live with. Fortunately, problem
areas aren't entirely random -- bad parts tend to produce errors
quickly -- so you don't need to perform 10000 tests to have 99.99%
reliability. A bad part will likely show up within the first few
passes. I think most people do about 6 passes if they are waiting for
the results. At most I would do 10 if you are under time constraints.
Otherwise, assuming this is for your home PC, I recommend you just
leave it running overnight and/or during a workday while you are away.
This should be enough to give you a solid margin of error and does not
impede on your schedule. |
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External
Since: Oct 11, 2007
Posts: 178
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(Msg. 3) Posted: Mon Dec 17, 2007 6:37 pm
Post subject: Re: How long to run Memtest86? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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larc-news.RemoveThis@saturnlink.net wrote:
> While I realize there are better memory test programs than Memtest86,
> it's probably the best free one. So, any suggestions on how long or
> for how many passes I should run it?
>
> Thanks for your help.
> Larc
>
Yes, Memtest86+ (also free). Seriously, it recognizes more CPUs and
seems to be just as good, if not better than, Memtest86.
http://www.memtest.org/
As mentioned, run it for at least a few full passes, which shouldn't be
more than a few hours, at most. >> Stay informed about: How long to run Memtest86? |
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External
Since: May 23, 2007
Posts: 58
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(Msg. 4) Posted: Mon Dec 17, 2007 7:01 pm
Post subject: Re: How long to run Memtest86? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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<larc-news.DeleteThis@saturnlink.net> wrote in message news:nitdm3d1d0autdcght8uc6rm94k1aagj1p@4ax.com...
> While I realize there are better memory test programs than Memtest86,
> it's probably the best free one. So, any suggestions on how long or
> for how many passes I should run it?
>
> Thanks for your help.
> Larc
Several hours at a minimum, some people run it for several days.
Personally I don't waste more than an hour or two on it. If I had
a dollar for every memory subsystem that passed Memtest with
flying colors, then proceeded to crash and be unstable when
running 3D games, I'd be very very wealthy. >> Stay informed about: How long to run Memtest86? |
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External
Since: Feb 08, 2004
Posts: 687
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(Msg. 5) Posted: Mon Dec 17, 2007 7:01 pm
Post subject: Re: How long to run Memtest86? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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<nospam RemoveThis @sbcglobal.invalid.net> wrote in message
news:uKC9j.24971$4V6.8345@newssvr14.news.prodigy.net...
> <larc-news RemoveThis @saturnlink.net> wrote in message
news:nitdm3d1d0autdcght8uc6rm94k1aagj1p@4ax.com...
> > While I realize there are better memory test programs than Memtest86,
> > it's probably the best free one. So, any suggestions on how long or
> > for how many passes I should run it?
> >
> > Thanks for your help.
> > Larc
>
> Several hours at a minimum, some people run it for several days.
> Personally I don't waste more than an hour or two on it. If I had
> a dollar for every memory subsystem that passed Memtest with
> flying colors, then proceeded to crash and be unstable when
> running 3D games, I'd be very very wealthy.
>
>
>
Right...
if no problems turn up after a few hours...the memory is probably good.
Only once did memtest pass some memory that really did not cut it...
and I've used memtest many time >> Stay informed about: How long to run Memtest86? |
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External
Since: Dec 17, 2007
Posts: 35
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(Msg. 6) Posted: Mon Dec 17, 2007 7:49 pm
Post subject: Re: How long to run Memtest86? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Thanks very much for the help. I've already downloaded and installed
Memtest86+ to a floppy and will try it later.
BTW, I was using Memtest86 v3.0 but upgraded to the latest v3.4. I
couldn't get it to work correctly on either computer I tried it on
(both CD and floppy). All the tests would appear to run in about four
seconds and then a summary of extensive errors in every test would
come up. Had to drop back to v3.3. It works with no problems.
Larc
§§§ - Change planet to earth to reply by email - §§§ >> Stay informed about: How long to run Memtest86? |
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External
Since: Oct 09, 2004
Posts: 2479
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(Msg. 7) Posted: Mon Dec 17, 2007 8:38 pm
Post subject: Re: How long to run Memtest86? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Larc wrote:
> Thanks very much for the help. I've already downloaded and installed
> Memtest86+ to a floppy and will try it later.
>
> BTW, I was using Memtest86 v3.0 but upgraded to the latest v3.4. I
> couldn't get it to work correctly on either computer I tried it on
> (both CD and floppy). All the tests would appear to run in about four
> seconds and then a summary of extensive errors in every test would
> come up. Had to drop back to v3.3. It works with no problems.
> Larc
Why not try the latest one from here ?
http://www.memtest.org/
There are two streams of memtest, and the one at
memtest.org picked up, after updates for the other
version stopped for a while. So you have the
choice of two different web sites.
The memory tester respects the memory map defined
by the BIOS. If the BIOS says there are several
"do not touch" areas, then memtest works around them.
(It wouldn't be very healthy, if the BIOS was writing
in one of those zones, when memtest came barging in,
and vice versa. Memtest would conclude the memory was
bad.)
A possible reason your test results returned so fast,
is the test program has got confused about what is
reserved and what is not. It could be that by
misreading a reserved segment description, the
majority of the memory got reserved by accident.
It could be a programming bug.
Paul >> Stay informed about: How long to run Memtest86? |
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External
Since: Mar 09, 2006
Posts: 55
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(Msg. 8) Posted: Mon Dec 17, 2007 9:00 pm
Post subject: Re: How long to run Memtest86? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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"RobV" <robv RemoveThis @nowhere.invalid> wrote in message
news:47670842$0$1409$4c368faf@roadrunner.com...
> larc-news RemoveThis @saturnlink.net wrote:
>> While I realize there are better memory test programs than Memtest86,
>> it's probably the best free one. So, any suggestions on how long or
>> for how many passes I should run it?
>>
>> Thanks for your help.
>> Larc
>>
>
>
> Yes, Memtest86+ (also free). Seriously, it recognizes more CPUs and seems
> to be just as good, if not better than, Memtest86.
> http://www.memtest.org/
>
> As mentioned, run it for at least a few full passes, which shouldn't be
> more than a few hours, at most.
>
The latest Memtest86+ is 1.70. It has no problems with the latest
multicore CPUs and motherboards. >> Stay informed about: How long to run Memtest86? |
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External
Since: Nov 16, 2005
Posts: 186
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(Msg. 9) Posted: Mon Dec 17, 2007 9:00 pm
Post subject: Re: How long to run Memtest86? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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In message <N6Cdndf_AKBOtPranZ2dnUVZ_qainZ2d RemoveThis @giganews.com> "Ian D"
<taurus RemoveThis @nowhere.com> wrote:
>The latest Memtest86+ is 1.70. It has no problems with the latest
>multicore CPUs and motherboards.
Still x86 though, no x64 support, correct? >> Stay informed about: How long to run Memtest86? |
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External
Since: Dec 17, 2007
Posts: 35
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(Msg. 10) Posted: Mon Dec 17, 2007 9:08 pm
Post subject: Re: How long to run Memtest86? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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On Mon, 17 Dec 2007 20:38:56 -0500, Paul <nospam.TakeThisOut@needed.com> wrote:
>Larc wrote:
>> Thanks very much for the help. I've already downloaded and installed
>> Memtest86+ to a floppy and will try it later.
>>
>> BTW, I was using Memtest86 v3.0 but upgraded to the latest v3.4. I
>> couldn't get it to work correctly on either computer I tried it on
>> (both CD and floppy). All the tests would appear to run in about four
>> seconds and then a summary of extensive errors in every test would
>> come up. Had to drop back to v3.3. It works with no problems.
>> Larc
>
>Why not try the latest one from here ?
>
>http://www.memtest.org/
Thanks. RobV had suggested that and I've already downloaded and made
a floppy for later use.
Larc
§§§ - Change planet to earth to reply by email - §§§ >> Stay informed about: How long to run Memtest86? |
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External
Since: Mar 09, 2006
Posts: 55
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(Msg. 11) Posted: Mon Dec 17, 2007 9:20 pm
Post subject: Re: How long to run Memtest86? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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"DevilsPGD" <spam_narf_spam RemoveThis @crazyhat.net> wrote in message
news:joaem3pm0534stdnvrklcpsjuj0fn5e7dt@4ax.com...
> In message <N6Cdndf_AKBOtPranZ2dnUVZ_qainZ2d RemoveThis @giganews.com> "Ian D"
> <taurus RemoveThis @nowhere.com> wrote:
>
>>The latest Memtest86+ is 1.70. It has no problems with the latest
>>multicore CPUs and motherboards.
>
> Still x86 though, no x64 support, correct?
The OS is irrelevant as it runs at machine language level and
loads off a diskette with Memtest86+'s own bootloader. >> Stay informed about: How long to run Memtest86? |
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External
Since: Nov 16, 2005
Posts: 186
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(Msg. 12) Posted: Mon Dec 17, 2007 9:20 pm
Post subject: Re: How long to run Memtest86? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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In message <uJ-dnSi3lYvis_ranZ2dnUVZ_qKgnZ2d.RemoveThis@giganews.com> "Ian D"
<taurus.RemoveThis@nowhere.com> wrote:
>
>"DevilsPGD" <spam_narf_spam.RemoveThis@crazyhat.net> wrote in message
>news:joaem3pm0534stdnvrklcpsjuj0fn5e7dt@4ax.com...
>> In message <N6Cdndf_AKBOtPranZ2dnUVZ_qainZ2d.RemoveThis@giganews.com> "Ian D"
>> <taurus.RemoveThis@nowhere.com> wrote:
>>
>>>The latest Memtest86+ is 1.70. It has no problems with the latest
>>>multicore CPUs and motherboards.
>>
>> Still x86 though, no x64 support, correct?
>
>The OS is irrelevant as it runs at machine language level and
>loads off a diskette with Memtest86+'s own bootloader.
>
A swing and a miss. I am speaking to the instruction set memtest86
itself uses, if it's x86 then it cannot address or test physical RAM
which overlaps address space allocated to hardware.
If you run a x86 OS, that's not a problem, the OS can't use the RAM
either. However, if you run a x64 OS, you may end up using RAM that a
x86 tester cannot test, and therefore the tester cannot give reliable
results. >> Stay informed about: How long to run Memtest86? |
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External
Since: Dec 12, 2006
Posts: 50
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(Msg. 13) Posted: Mon Dec 17, 2007 9:20 pm
Post subject: Re: How long to run Memtest86? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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>>>>> "ID" == Ian D <taurus DeleteThis @nowhere.com> writes:
ID> The OS is irrelevant as it runs at machine language level and
ID> loads off a diskette with Memtest86+'s own bootloader.
Maybe the OP was asking if memtest86+ tests 64-bit addressess...and
the answer is...
"Memtest is not 64 bit and as far as I know a 64 bit version is not yet
planned. Memtest can test more than 4GB without a problem though, in
32 bit mode the processor supports PAE (Physical Address Extension)
which let's it address up to 64GB, of course the feature must be
enabled in the BIOS."
http://forum.x86-secret.com/showthread.php?s=4ceea6317960b1fb3e4252cd9...3106&t=
--
"He inherited some good instincts from his Quaker forebears, but by
diligent hard work, he overcame them."
-James Reston (about Richard Nixon) >> Stay informed about: How long to run Memtest86? |
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External
Since: Oct 11, 2007
Posts: 178
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(Msg. 14) Posted: Mon Dec 17, 2007 9:25 pm
Post subject: Re: How long to run Memtest86? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Ian D wrote:
> "RobV" <robv.DeleteThis@nowhere.invalid> wrote in message
> news:47670842$0$1409$4c368faf@roadrunner.com...
>> larc-news.DeleteThis@saturnlink.net wrote:
>>> While I realize there are better memory test programs than
>>> Memtest86, it's probably the best free one. So, any suggestions on
>>> how long or for how many passes I should run it?
>>>
>>> Thanks for your help.
>>> Larc
>>>
>>
>>
>> Yes, Memtest86+ (also free). Seriously, it recognizes more CPUs and
>> seems to be just as good, if not better than, Memtest86.
>> http://www.memtest.org/
>>
>> As mentioned, run it for at least a few full passes, which shouldn't
>> be more than a few hours, at most.
>>
> The latest Memtest86+ is 1.70. It has no problems with the latest
> multicore CPUs and motherboards.
"it recognizes more CPUs". I believe I said that... >> Stay informed about: How long to run Memtest86? |
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External
Since: Dec 17, 2007
Posts: 35
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(Msg. 15) Posted: Mon Dec 17, 2007 9:26 pm
Post subject: Re: How long to run Memtest86? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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On Mon, 17 Dec 2007 17:47:21 -0800 (PST), yaugin <yaugin.RemoveThis@gmail.com>
wrote:
>Time spent is completely irrelevant as the amount of testing done
>depends on system speed and the size of your memory (half the memory =
>twice as much testing per hour). The more memory you need to test, the
>more time you have to spend. Thus reliability should be measured
>solely in the number of passes, and how many to run depends on what
>margin of error you're willing to live with. Fortunately, problem
>areas aren't entirely random -- bad parts tend to produce errors
>quickly -- so you don't need to perform 10000 tests to have 99.99%
>reliability. A bad part will likely show up within the first few
>passes. I think most people do about 6 passes if they are waiting for
>the results. At most I would do 10 if you are under time constraints.
>Otherwise, assuming this is for your home PC, I recommend you just
>leave it running overnight and/or during a workday while you are away.
>This should be enough to give you a solid margin of error and does not
>impede on your schedule.
Overnight seems to be the consensus. I ran v3.0 for seven passes and
no errors, but I'll let a newer version go all night to see if results
with more passes are still good.
Memory is 2MB (4x512K) of Corsair XMS PC3200 running at CAS 2.
Larc
§§§ - Change planet to earth to reply by email - §§§ >> Stay informed about: How long to run Memtest86? |
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