Graphics
I tested BOBMF on my Celeron 466 Mk II with a Hercules 3D Prophet III Titanium 500 graphics accelerator card.
CPU
The 466 processor I used was really bottom of the range for an acceptable games machine in late 2001 and 2002. And it is the CPU which forms the bottleneck in scenes such as the Normandy landings where there are ships, landing craft, aircraft, AAA and ground units all moving about. There are only a couple of missions with this level of activity so 90% of the missions are quite playable on a rig such as the one I used.
Microsoft Combat Flight Sim 2
Microsoft Flight Simulator 2000
Microsoft Flight Simulator 2002
416Mb Hard drive space for Combat Flight Simulator 2 installation 209Mb Hard drive space for Flight Simulator 2000 installation
8Mb 3D Graphics accelerator card
Pentium II 450MHz or higher
16Mb or more 3D graphics accelerator card
Monitor capable of 1024 X 768 resolution