Hi,
1)Hard Disk space - ~ 250 GB of free space
2)RAM(Which is robust enough to handle ME as well as MII on the same box) - 12-16 GB
3)Processor - Quad core
4)OS - Windows 2008
5)Compatible MS SQL DATABASE (For NW 7.4) - Windows 2008, 2012
6)Compatible MS SQL DATABASE (For SAP ME 15.0) - Windows 2008, 2012, 2005.
Thanks,
Shridhar.