Question: I would like to be able to install 48GB of RAM in my server, but it seems Windows Server 2008 Standard limits me to 32GB.

How do I install more RAM in my server?

Answer: 
You will have to upgrade to an Enterprise or Datacenter version of Windows.

Additionally, if you want to use more than 2 GB of memory for any one process, you'll have to upgrade to the 64 bit version.

[Available memory table from Microsoft](http://msdn.microsoft.com/en-us/library/aa366778(VS.85).aspx)
To go beyond 32 Gigs you'll need to upgrade Windows 2008 Enterprise Edition.