The Sony PCG 505-838 Series includes 24 models of laptop computers. They come with a range of installed memory, spanning from as little as 16 MB to as much as 64 MB. They may be upgraded to 128 MB to 192 MB of memory, depending on the model. All models of Sony PCG 505-838 Series computers have 2 memory card sockets. For information on your specific computer, click on the corresponding model number on our site.