Memory diagnostic result

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Joseph King

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Jun 30, 2001
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We had our main machine blue-screen on us a couple times within a week.

I took the memory out and put it into a different machine and ran Windows Memory Diagnostic from floppy (those USB floppy drives are cheap and actually functional and handy, by the way).

I left it running in Standard mode for about 24 hours. When I came back to check it, it had done 300 passes, and it showed one error during pass 132. (It also reveals which module when I drill down.)

Is this conclusive that it's bad memory? What are the odds it's a fluke mis-reading or perhaps some intermittent imperfection in some piece of hardware in the machine that this diagnostic test is running on?

The reason I ask is not so I know whether to replace the memory or not -- that's a given, it's history. I'm asking because I need to make a decision on whether our main computer that was blue-screening is now okay because we removed this memory, of if it may still have other bad hardware because this memory diagnostic is not really 100% reliable.

Thanks!
 

crjdriver

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Test the memory in the problem machine. Next what memory are you using? Post a link to your memory. The reason is that high performance memory will very often need a higher ram voltage [vdimm] set in the bios. Running high end ram at stock voltage often results in errors.
 

Joseph King

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>> "Test the memory in the problem machine." <<

I don't understand what you mean. I took the memory out of the problem machine as soon as possible in case that was the culprit and replaced it with other memory. I put the memory that came out of the problem machine into another machine that we don't need to be using every day and am running the diagnostic on it around the clock in that machine.

Simple-Tech "Value" Memory, PC-2 6400, 1GB sticks, 4 of them; (was in HP Core 2 Duo machine, our main machine).

By the way, can I run diagnostic on this in a Pentium 4 machine that came with PC-2 4200U RAM? Will test results still be reliable if it shows an error? Or should I only test it on a machine that came with the same PC-2 6400 RAM?

Thanks.
 

crjdriver

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I mean leave the memory in the problem machine and test it.
Memory is matched to the machine. All [or almost all] motherboard makers have a list of approved or tested memory for their products. How do you know the memory you removed and installed in another machine has ever been tested and found to work in that machine? In order for the memory test to be valid, test it in the machine with the problem.

Install your memory into the machine that is having the problem. Now boot with a memtest CD and run a test. Almost all value memory does not need a higher vdimm set in the bios. It basic not high performance memory.

Next do you have any monitoring software installed that will monitor voltages? Many board makers supply this or you can use something like speedfan. You can also monitor your voltages in the bios however the system is not under any load when running in the bios.
 

crjdriver

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BTW what you are looking for is a varying voltage; ie the 12V rail going from 11.8 to 12.2V or something like that. If you see the 12V rail dropping when the system is put under a load, it is a good indication that you have a power supply that is failing.
 
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