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#1
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Importance of SPD?
I have been mixing and matching chips as I suppose everyone does (making
sure that they are all, e.g. 100 mhz chips) and have suddenly started to get a supposedly important error message telling me that the SPD is missing or inconclusive on some of them I could probably tell by elimination which ones are giving the error message although at the moment it looks as if all of them are and some will let me go into windows, some wont Is there any test I can run to tell me if a chip will work OK even with this error message and what is wrong with others or what is wrong with them in this particular system? I have tried memtest but it runs interminably and SEEMS to end up just telling me if a chip is bad, which I suspect none of these are. |
#2
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"Maria Ripanykhazova" news.rnc.com wrote :
I have been mixing and matching chips as I suppose everyone does (making sure that they are all, e.g. 100 mhz chips) and have suddenly started to get a supposedly important error message telling me that the SPD is missing or inconclusive on some of them SPD = small serial eeprom on the dimm stick Pozdrawiam. -- RusH // http://randki.o2.pl/profil.php?id_r=352019 Like ninjas, true hackers are shrouded in secrecy and mystery. You may never know -- UNTIL IT'S TOO LATE. |
#3
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Bitstring , from the wonderful person
Maria Ripanykhazova said I have been mixing and matching chips as I suppose everyone does (making sure that they are all, e.g. 100 mhz chips) and have suddenly started to get a supposedly important error message telling me that the SPD is missing or inconclusive on some of them I could probably tell by elimination which ones are giving the error message although at the moment it looks as if all of them are and some will let me go into windows, some wont Is there any test I can run to tell me if a chip will work OK even with this error message and what is wrong with others or what is wrong with them in this particular system? I have tried memtest but it runs interminably and SEEMS to end up just telling me if a chip is bad, which I suspect none of these are. Memtest is the best thing for testing memory. however if the SPD is wrong/broken then the BIOS may be selecting the wrong memory speed parameters (of which '100 Mhz' is probably the least interesting number) = you'd have to go into the BIOS startup screen and manually set the memory parameters .. at which point knowing what the chips are actually good for is sort of useful. -- GSV Three Minds in a Can Outgoing Msgs are Turing Tested,and indistinguishable from human typing. |
#4
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Memtest just keeps on running interminably, repeating something or other
over and over again and reports that everything is OK and that all chips pass all tests. The reason for my posting was to find out how important SPD was rather than find out that it is a small eeprom which I already knew but there again, if the important bit is that memtest will tell me all I need to know, then that is really all I need to know, isn't it! I assume therefore that the data on the EPROM isn't important so long as the memory itself passes the test The dodgy bit is that some chips which pass memory only sometimes register their memory in the OS and only sometimes let me into the OS itself. Memtest is the best thing for testing memory. however if the SPD is wrong/broken then the BIOS may be selecting the wrong memory speed parameters But I have absolutely no reason to think tha tthese spd chips actually broken except for the error messag which is inconclusive, to say the least! (of which '100 Mhz' is probably the least interesting number) = you'd have to go into the BIOS startup screen and manually set the memory parameters .. at which point knowing what the chips are actually good for is sort of useful. (I am not really in a position to find out all sorts of arcane data within the chip itself unless I can post here and someone will know what the chip is?) |
#5
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On Sat, 29 Jan 2005 12:21:14 -0500, "Maria Ripanykhazova"
news.rnc.com wrote: I have been mixing and matching chips as I suppose everyone does (making sure that they are all, e.g. 100 mhz chips) and have suddenly started to get a supposedly important error message telling me that the SPD is missing or inconclusive on some of them I could probably tell by elimination which ones are giving the error message although at the moment it looks as if all of them are and some will let me go into windows, some wont Is there any test I can run to tell me if a chip will work OK even with this error message and what is wrong with others or what is wrong with them in this particular system? I have tried memtest but it runs interminably and SEEMS to end up just telling me if a chip is bad, which I suspect none of these are. SPD just stores the timing settings for the memory modules. If SPD is missing, beyond the fact that it violates the PC100 spec, it just means that you need to manually set the timings in the motherboard's BIOS. What you might be running into is that multiple unmatched memory modules might have different timings stored in their individual SPD chips. Since each module has different timings your board might just be getting confused. Either way the solution should be fairly straightforward, assuming the BIOS is smart. Just go into your BIOS, probably under "Advanced CMOS Setup" (or something along those lines) and set the memory timings manually. You'll probably want to set the timings to the slowest setting (highest numbers) at least initially to test. In short, SPD is nice because it automatically configures the memory timings for you, but it's not critical and it's programs incorrectly in a disturbingly large number of memory modules anyway. ------------- Tony Hill hilla underscore 20 at yahoo dot ca |
#6
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Thanks everyone for telling me that it really doesn't matter what the SPD
tells the OS or the BIOS: So long as I can get into windows the important bit is how much memory I can use. I have to admit I have never seen any part of the BIOS where you can set internal memory speed but as I say, the baffling bit is that sometimes it registers different amounts of memory but I can always reboot and as long as I see how much memory I know to be actually there, that is all that is important. "Tony Hill" wrote in message ... On Sat, 29 Jan 2005 12:21:14 -0500, "Maria Ripanykhazova" news.rnc.com wrote: I have been mixing and matching chips as I suppose everyone does (making sure that they are all, e.g. 100 mhz chips) and have suddenly started to get a supposedly important error message telling me that the SPD is missing or inconclusive on some of them I could probably tell by elimination which ones are giving the error message although at the moment it looks as if all of them are and some will let me go into windows, some wont Is there any test I can run to tell me if a chip will work OK even with this error message and what is wrong with others or what is wrong with them in this particular system? I have tried memtest but it runs interminably and SEEMS to end up just telling me if a chip is bad, which I suspect none of these are. SPD just stores the timing settings for the memory modules. If SPD is missing, beyond the fact that it violates the PC100 spec, it just means that you need to manually set the timings in the motherboard's BIOS. What you might be running into is that multiple unmatched memory modules might have different timings stored in their individual SPD chips. Since each module has different timings your board might just be getting confused. Either way the solution should be fairly straightforward, assuming the BIOS is smart. Just go into your BIOS, probably under "Advanced CMOS Setup" (or something along those lines) and set the memory timings manually. You'll probably want to set the timings to the slowest setting (highest numbers) at least initially to test. In short, SPD is nice because it automatically configures the memory timings for you, but it's not critical and it's programs incorrectly in a disturbingly large number of memory modules anyway. ------------- Tony Hill hilla underscore 20 at yahoo dot ca |
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