Do memory modules go bad or are they bad to begin with

Anyone know ?
fcekAsked:
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JohnBusiness Consultant (Owner)Commented:
They are chips and electronic circuitry. Yes, most assuredly, they can go bad (and do).  They are more likely (in my experience) to go bad, than to come dead on arrival. ... Thinkpads_User
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LMiller7Commented:
Memory modules can have manufacturing defects that will cause failures when in use. Normally this will happen during the warranty period. They can also fail for a wide variety of other causes. Except for unusual situations, such as when the module was abused or installed incorrectly, there is normally no way to determine the cause of the failure.
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skullguyCommented:
memory modules do burn out.


Try this test:
Microsoft Online Crash Analysis
Windows Memory Diagnostic. The Windows Memory Diagnostic tests the Random Access Memory (RAM) on your computer for errors. The diagnostic includes a …
http://oca.microsoft.com/en/windiag.asp

Memory is pretty cheap for what it does, so contact a few memory dealers and check the specs of you PC for what kind of memory you need. Some manufactures can tell you they right memory if you know what motherboard you have.
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JohnBusiness Consultant (Owner)Commented:
The above answers are really the same as I posted first. Memory modules can fail in use.

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nobusCommented:
possible reasons to fail :
-overheating
-overvoltage (or spikes) , can come from Power supply or exterior
-bad contacts (rarely seen)
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gismo51Commented:
The most common defect in memory sticks is a solid or intermittent memory IC failure due to ESD.  There is some ESD protection in the chips and having multiple chips connected together offers a little more resistance to static but it's still pretty easy to damage one if you're not real careful about handling them when they're not installed on the MB.

These days memory chips can generate a fair amount of heat so overheating (especially if a case fan fails) is a possibility but IME a very rare one since the CPU and it's support chips run much hotter and will likely suffer damage long before a memory chip dies.

Like any IC, memory chips do have a higher incidence of failure when new compared to ones that have been working properly for a few hundred hours.  Both the chip manufacturers and the companies that build the sticks do a significant amount of testing so it's very unlikely that a defective component will make it to the shelves undetected but it does happen.  I'd bet your chances of winning the lottery are far greater than the chance of finding a bad memory stick out of the box for a single MB as long as you don't kill it with mishandling.

One thing that's not very well publicized is that transient failures (loss of a single bit of data between the time it was written and read) are statistically significant.  The overall BER for the cells in today's memory chips is exceedingly low but when you consider that today's computers often have many GB and readout rates in the GB/s range you've got a huge multiplier working against that infinitesimally small probability so the chances are still in the realm of plausible.  When memory sizes first got into the MB range (remember that the first IBM PCs came with as little as 65KB) many folks figured that ECC (Errror Corrrection Code) memory designs would be necessary to make such "huge" memories usable but most PCs today don't have ECC memory which can eliminate the effects of an occasional transient bit failure.
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JohnBusiness Consultant (Owner)Commented:
The question here was a one line simple question. It has only one answer. I provided that. The rest is repetitive and fluff.

So I have unsubscribed and will ask a Moderator to remove my posts. ... Thinkpads_User
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gismo51Commented:
Technically the simplest answer to the original question is nothing more than yes so I guess by your measure all the other words in your first post were superfluous as well. Personally I think a little extra related info might actually be useful.
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fcekAuthor Commented:
Thanks everyone
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