Matt Pobursky wrote: > On Mon, 19 Nov 2001 15:44:15 -0600, Jon Elson wrote: > >Sure, the memory bus is pretty well characterized, but all > >memory chips > >come off a line where they are tested, and some percentage of > >them have > >bad rows and columns. The memory testing is not really > >rigorous, although > >most makers retest the 'stick' after placing the cips on it. > > Actually, the high speed digital testers employed by the memory > manufacturers FULLY test memory modules over their rated speed > and voltage ranges. Usually any problems that occur after the > module leaves the factory are due to handling, installation or > motherboard related issues (timing, voltage, noise, etc.) Memory > chips themselves are 100% parametrically tested after they are > packaged since the manufacturer is in the business of selling > specified, functional chips.
Not to continue this off-topic thread too far, but they only test the memory chips for a few seconds in each condition (hot, cold, etc.) and with the number of bits in a chip, it has to be a cursory test. The noise conditions present on the chips after they are mounted on the SEMM/DEMM module may not be ideal in all systems, either. > At any rate... if anyone is interested in FULLY testing your > system memory, you can get a great FREE memory test program at: > > http://www.teresaudio.com/memtest86/ > > It will exercise all your memory, CPU cache memory, etc. If > there's a memory bug, it will almost certainly find it. An > invaluable tool for evaluating your hardware setup. Thanks much for the link, I will try it out. I have another test program that doesn't seem to detect any problems on some suspect machines that crash way too much. Jon * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message: mailto:[EMAIL PROTECTED] * * To leave this list visit: * http://www.techservinc.com/protelusers/leave.html * * Contact the list manager: * mailto:[EMAIL PROTECTED] * * Forum Guidelines Rules: * http://www.techservinc.com/protelusers/forumrules.html * * Browse or Search previous postings: * http://www.mail-archive.com/proteledaforum@techservinc.com * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
