As I stated before, check on the benefits the BIOS update, before performing one. Dell will tell you what they have on the new BIOS. 9 times out of 10 the update is necessary.
If it states that you can update memory using more than 1GB memory modules then update, otherwise it might not be necessary to install the update.
Believe me I do this almost every day in my regular job. I have to do system updates on file servers.
