I have a dell 2400 dimension with 384 mb and would like to increase to 512 mb. Can I add an additional card?

[rrivers788]

I have other computers lying around, can I use a ram card from one of them in addition to what is already in my computer?

 

[algorithmbreaker]

I have other computers lying around, can I use a ram card from one of them in addition to what is already in my computer?

Yes, you can install. 384 MB is 256 MB + 128 MB.

Recommend at least 1 GB upgrade.

Dell Dimension 2400 supports 2 x 1 GB RAM Max.

Refer: http://www.memorystock.com/memory/DellDimension2400.html