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Re: question about memtest86+




Thank Ben and David!

fixing fan problem takes time and energy. as learner, i'm prone to make mistakes. i'm in poor health.  i'd rather buy new one if it break down

actually i have several old PCs, lenovo and hp dx5150 among other more dated ones. dx5150 has 2G memory and it pass memtest. if lenovo doesn't work, i can use hp

i bought lenovo and hp from 2nd-hand dealer, their price is about the same:200 yuan (one USD is about 6.9 yuan now) the price doesn't include monitor/keyboard/mouse. because they are cheap, i'll buy new one instead of fixing them if they don't work

from my point of view lenovo is OK in past five years, the only  problem is it doesn't pass memtest86+
my policy is don't fix them unless they don't work


On Saturday, August 25, 2018, 11:43:51 AM GMT+8, David Christensen <dpchrist@xxxxxxxxxxxxxxxx> wrote:


On 08/24/2018 12:05 AM, Long Wind wrote:
> Sorry, Ben, i made mistake, it isn't hp dx5150, it's lenovo
> motherboard is 865GV-M8,

I'm having a hard time STFW for that motherboard.  There are several
motherboards that use the 865GV chipset, both socket 478 and LGA 775.
Please provide a URL to the exact motherboard.


My two oldest machines have Intel D865GBFLK motherboards with socket 478
Pentium 4 processors (2.8E GHz and 3.4E GHz, respectively).  They were
getting hot under load with the stock Intel CPU coolers, so I switched
to Zalman high-speed ducted fan CPU coolers.  The processors run cooler
now, but the fans are even noisier.  The computers have always generated
a fair amount of heat.  I do not recall any thermal shutdown events.
The place to look for such would be the BIOS event log.


> it uses Dual DDR 400 memory
> i've used it for about 5 years, it's OK except sometimes it's noisy
> noise must come from fans in case

You probably have an LGA 775 model with a BIOS-controlled variable speed
CPU fan that speeds up when the CPU is under load.


> since it's OK,

Your computer is *not* OK if it shuts down during memory testing.


> why should i bother with memory or overheat problem?

Because if you request help from people and then refuse to act upon
reasonable advice, you are unlikely to solve your problem and they are
less likely to advise you in the future.


> it has 512M x 2, now i want to change one of them to 1G, so that total is 1.5G

That will defeat dual-channel mode.  You want a matched pair of the
biggest, fastest, and lowest latency memory modules that are recommended
for that computer/ motherboard by the memory manufacturer.


That said, I hesitate before sinking money into obsolete computers.  One
of my old P4's has the original 2 @ 512 MB and 2 @ 256 MB modules from
both computers; the other has 2 @ 1 GB upgrades from ~10 years ago.



> i want to use memtester to test it, but it doesn't print progress, it seems i have to wait forever.


RTFM memtester(8).  Tell it to use less memory and/or perform fewer
iterations:

    https://linux.die.net/man/8/memtester


On 08/24/2018 03:51 AM, Long Wind wrote:
> i use xosview to monitor memory usage
> maybe i shall use big program (memory hog) to test memory
> but it sounds too unprofessional

It is professional to use the right tool for the job.


All of the above said, the best way to avoid memory problems is to have
computers with ECC memory.


David