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Windows and New Memory

Trish's Escape from Hardware Hell Help Board » Hardware » Memory Related » Windows and New Memory « Previous Next »

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Posted on Tuesday, October 2, 2001 - 10:34 am:   

Hiya ppl, just a small Problem with a new 256 m/b memory chip in windows. I have only just changed over for the 2nd time a new P133 256m/b memory chip. I have installed this in Dimm 1 and in Dimm 2 slott I have a 128 m/b p 133 chip as well. Now in dos the computer has no problems whatsoever and operates fine.

Dos will find a total of 393 m/b of Memory. Now once Windows 98 is loaded I can only get a total of 112 M/b's. Yes I have tested the chips in both slots and also in the computer by themselves. Regardless of what I do the maximum I can get is 112 m/b from any configuration. This problems still persists even with the new chip I have just picked up. I am operatin a Celeron 700 on a Pcchips M754lmr Motherboard.

I have done a flash to Bios and upgraded to the latest version but still the problem persists. I am wondering if there is a bug or any other problem that somebody may know of that would be causing this

It would be greatly appreciated for any help that can be offered. that even means a free beer to you if your in Canberra :)

please contact me at
Adam Low
Posted on Tuesday, October 2, 2001 - 7:05 pm:   

Rhy, I do not know if you have the manual for this mobo handy, but you can download it at

On page 12, there is something about the memory configuration "If the installed CPU uses a 100 MHz system bus, you must use PC100 or PC133 memory. If the installed CPU uses a 66 MHz system bus, you must use PC66 memory."

The celeron 700 that you have is probably of 66MHz FSB, and the memory chip is of 133MHz. That might have caused a conflict in the system itself. I do not know how to explain the functioning in DOS, or how the 128MB chip worked, but I think that is a pretty good clue as to why it is not working.

Good luck.

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