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Memory Query
I have just set up an elderly PC with a MyComp VP3-586B-W877 motherboard running an AMD K2 450mhz. Old, I know, but it does all that is required. The PC originally had one 128mb SDRAM module which was in the first of three banks and was recognised and worked fine. I added a second 128mb SDRAM module and it only recognised a total of 191mb. I then added a third module, this time 32mb to try and up the total but I still only get 191mb. I ran Sisoft Sandra and that is reporting 64mb in each of the three banks. I am now totally confused. Does anyone have any idea what is happening? All thoughts gratefully received. The PC is now back with its owner and I won't see it for some weeks but I'd like to have some ideas to try when the opportunity arises. -- Keith Willcocks (If you can't laugh at life, it ain't worth living!) Keith wrote:
Show quoteHide quote > Hi, Two things I would suggest if you have not already done so: First > > I have just set up an elderly PC with a MyComp VP3-586B-W877 motherboard > running an AMD K2 450mhz. Old, I know, but it does all that is required. > The PC originally had one 128mb SDRAM module which was in the first of three > banks and was recognised and worked fine. I added a second 128mb SDRAM > module and it only recognised a total of 191mb. I then added a third > module, this time 32mb to try and up the total but I still only get 191mb. > I ran Sisoft Sandra and that is reporting 64mb in each of the three banks. > > I am now totally confused. Does anyone have any idea what is happening? > All thoughts gratefully received. > > The PC is now back with its owner and I won't see it for some weeks but I'd > like to have some ideas to try when the opportunity arises. > check the manual on the MB to see if there are any restrictions with regard to what type and size of memory can be installed. Second I would run a thorough memory test on each stick individually, before combining it with another stick. Sometimes a defective stick will read less than its total capacity and when combined with another stick also reduce its usable capacity. The second 128 MB DIMM might be recognized as 64 MB because it has higher density chips than the memory controller is designed for. This is a very common problem. I suspect that the original DIMM has 8 chips and the second DIMM has 4 (higher density) chips. The total memory recognized would be 192 MB, or 191 MB extended memory. Sisoft Sandra is obviously wrong. Do as Ken suggested and test each DIMM individually.
Keith wrote: Show quoteHide quote > > Hi, > > I have just set up an elderly PC with a MyComp VP3-586B-W877 motherboard > running an AMD K2 450mhz. Old, I know, but it does all that is required. > The PC originally had one 128mb SDRAM module which was in the first of three > banks and was recognised and worked fine. I added a second 128mb SDRAM > module and it only recognised a total of 191mb. I then added a third > module, this time 32mb to try and up the total but I still only get 191mb. > I ran Sisoft Sandra and that is reporting 64mb in each of the three banks. > > I am now totally confused. Does anyone have any idea what is happening? > All thoughts gratefully received. > > The PC is now back with its owner and I won't see it for some weeks but I'd > like to have some ideas to try when the opportunity arises. > > -- > Keith Willcocks > (If you can't laugh at life, it ain't worth living!) -- Mike Walsh West Palm Beach, Florida, U.S.A.
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"Mike Walsh" <mikew***@sbcglobal.net> wrote in message Thanks Mike, that makes perfect sense. Unfortunately, because the British news:423467C0.FA32BF0D@sbcglobal.net... > > The second 128 MB DIMM might be recognized as 64 MB because it has higher > density chips than the memory controller is designed for. This is a very > common problem. I suspect that the original DIMM has 8 chips and the > second DIMM has 4 (higher density) chips. The total memory recognized > would be 192 MB, or 191 MB extended memory. Sisoft Sandra is obviously > wrong. Do as Ken suggested and test each DIMM individually. > > Keith wrote: >> >> Hi, >> >> I have just set up an elderly PC with a MyComp VP3-586B-W877 motherboard >> running an AMD K2 450mhz. Old, I know, but it does all that is >> required. >> The PC originally had one 128mb SDRAM module which was in the first of >> three >> banks and was recognised and worked fine. I added a second 128mb SDRAM >> module and it only recognised a total of 191mb. I then added a third >> module, this time 32mb to try and up the total but I still only get >> 191mb. >> I ran Sisoft Sandra and that is reporting 64mb in each of the three >> banks. >> >> I am now totally confused. Does anyone have any idea what is happening? >> All thoughts gratefully received. >> >> The PC is now back with its owner and I won't see it for some weeks but >> I'd >> like to have some ideas to try when the opportunity arises. >> >> -- >> Keith Willcocks >> (If you can't laugh at life, it ain't worth living!) > Telecom news server is somewhat less than reliable (you could even say totally unreliable), Ken's reply did not appear, but I gather he suggested trying each DIMM individually to see what registers. I will try that, but your point does make perfect sense. Many thanks -- Keith Willcocks (If you can't laugh at life, it ain't worth living!) |
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