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View Full Version : I need to know the details about MemTest.


chrisling
10-09-2006, 08:46 AM
I've tested MemTest. I'm not really sure how to read the result. The screen just showing the running test over and over again seems will never stop.

Need help here...I wish I can know more about it because every expert here did recommend it well.:)

Budfred
10-09-2006, 08:55 AM
It takes a very long time to complete... Leave it running and come back later... It will give you a report when it is done...

Whyzman
10-09-2006, 10:33 AM
What's it doing?

"Memory Testing Philosophy
There are many good approaches for testing memory. However, many tests simply throw some patterns at memory without much thought or knowledge of memory architecture or how errors can best be detected. This works fine for hard memory failures but does little to find intermittent errors. BIOS based memory tests are useless for finding intermittent memory errors.

Memory chips consist of a large array of tightly packed memory cells, one for each bit of data. The vast majority of the intermittent failures are a result of interaction between these memory cells. Often writing a memory cell can cause one of the adjacent cells to be written with the same data. An effective memory test attempts to test for this condition. Therefore, an ideal strategy for testing memory would be the following:

1) write a cell with a zero
2) write all of the adjacent cells with a one, one or more times
3) check that the first cell still has a zero

It should be obvious that this strategy requires an exact knowledge of how the memory cells are laid out on the chip. In addition there is a never ending number of possible chip layouts for different chip types and manufacturers making this strategy impractical. However, there are testing algorithms that can approximate this ideal."

chrisling
10-09-2006, 10:59 AM
:eek: Wow...Amazing. Now I got it. Thanks PR it's crystal clear of the explaination. Thank you too mjc for willing to analyse the report if MemTest. I'll find someday to do the test, perhaps when I'm totally free...

Thanks.

Whyzman
10-09-2006, 11:32 AM
If you desire further information regarding exactly how Memtest probes a memory chip for errors/leaks, visit www.memtest86.com

chrisling
10-09-2006, 07:06 PM
Whyzman I'm sorry about this

Thanks PR it's crystal clear of the explaination

I thought you are PR, I didn't realize because usually he is the one who will explain very very details in the replies. Thanks again for your help. :p