VC 2.5 requires at least:
2Ghz Cpu
2GB ram
560MB hard drive space
Network Card (pref 1Gb)
The OS needs to be Windows 2000 server with sp4 or Windows server 2003 with sp1 or Windows Server 2003 R2 edition.
Supported databases are:
Oracle 9i
Oracle 10g
SQL Express 2005 (ment for non production or low count farms)
SQL 2005 with sp1
SQL 2000 with sp4