rmnp0829
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PC RAM upgrade - pulling RAM from different machines
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?
Thanks!
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?
Thanks!
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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
The PC2100 and PC2700 are both DDR
PC2-4200 is DDR2 (there is a PC4200 that's DDR, but the PC2-4200 spec is DDR2), so no, you cannot mix them.
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
The PC2100 and PC2700 are both DDR
PC2-4200 is DDR2 (there is a PC4200 that's DDR, but the PC2-4200 spec is DDR2), so no, you cannot mix them.
Heh, which is basically what zephyr said....so ignore me :P
I have seen instances where sometimes they would boot mixed up, and would drop to the lowest speeds, but there were problems in windows at times.
512MB 1Rx8 PC2-4200U-444-11-A1
Isnt this dual channel?