It is possible - however not recommended for most. If you put in more than 4GB RAM, use of the PAE switch will enable an application with AWE support (Address Windows Extensions) to access the additional RAM. But only if you have apps that support AWE. This would be things like database software. It isn't for terminal servers. A better solution, although bleeding edge, would be running the 64 bit version of the OS and Citrix. You should be able to find details on PAE and 64bit over on Brian Madden's site. tim _____ From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Toby Sent: Thursday, November 10, 2005 6:59 AM To: thin@xxxxxxxxxxxxx Subject: [THIN] Windows Server 2003 Standard - 4gb Limit Hi List Environment - Windows Server 2003 Standard with PS4.0 I have read in a thread that it is possible to use more than 4gb of RAM on the above OS by using the /PAE mode. Has anyone done this, and if so, recommend it? Many thanks