>Note that I said "new box" :)
>
>SQL Server - 64 bit version (and the interim release of SQL Server later this year will take better advantage of 64-bit architecture)
>MOSS - 64 bit version
>
>And obviously the 64-bit versions of the OS. I'm recently upgraded from Win Server '08 to Win Server '08 64-bit and have noticed better performance.
>
>MS general trend right now is 64-bit



I was asking about Workstation 64-bit OS.

We're using 64-bit SQL Server 2005 on 64-bit Windows 2003 for a while already and I'm aware of benefits there.

Windows Server 2008 R2 comes in 64-bit version only. No 32-bit version anymore.