chasf:
The
Compaq Presario V5101US laptop does use DDR PC2700 SODIMM modules and supports up to 2048 MB(2 GB) of RAM, so it will accept a 1024 MB(1 GB) module in each slot.
Here is a blowup image from the MEMORYTEN site of what that module looks like. As you can see, it has an informational label on it.
If you look at the label on the modules in your laptop, it'll likely have "256 MB" on the label - if they are 256 MB modules.
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Here is the support site for that laptop. I highly recommend that you add and save this site to your browser favorites/bookmarks list so you can refer to it when needed.
Here is the section with instructions and images for removing and installing RAM modules. Scroll down to
Determining how much RAM memory is installed in your computer while the computer is turned off and then start reading from there.
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