The question that you should ask your self is – will it be beneficial to work with more memory. For example if you have only 1 database and its size is 1 GB, then most chances that you will not benefit at all. While I admit that I gave you an extreme example, there might be other situations that you will not benefit from giving more memory to SQL Server. On the other hand if you do have performance problems and you decided that this due of memory pressure, then there is a very good chance that you’ll benefit from working with more memory. Before changing the configuration I advise you to read more about awe and how to modify the boot.ini file.

Adi