PC RAM upgrade - pulling RAM from different machines
Posted on 2007-04-06
I have an older IBM PC that has 512 and 256 Ram cards and a HP Pavillion PC that has 512MB. Below are the details:
PC 1 - IBM
RAM 1 - 256MB DDR PC2100-25331-Z CL2.5
RAM 2 - 512MB DDR PC2700U-25330 CL2.5
PC 2 - HP Pavilion
RAM 1 - 512MB 1Rx8 PC2-4200U-444-11-A1
I wanted to combine the two 512 RAM cards into the HP Pavilion machine. However, it will not boot when I put these cards in the machine. I then tried putting the two RAM cards from my IBM machine into the HP Pavilion to realize 768 RAM and that didn't work either.
Does anyone have thoughts or suggestions? I also might go out and buy a 1GB module as well, so does anyone have suggestions about the best type of RAM to get? Also, what does all these RAM numbers mean?