This is right off the box:
Operating System: Windows 98/ME/XP/2000
Processor: Pentium III or AMD Athalon 1GHz
Memory: 512Mb
3D Card: 64 Mb minimum
Direct X: Direct X 9 or higher
DVD Drive: 4x
Sound Card: Direct X 9 compliant
Hard Disk: 4.0Gb hard-drive space for installation
Perhipherals: Mouse and Keyboard
Multiplayer: broadband connection
Keep in mind these are minimum requirements.
My Legacy gamer runs the original, PF and FB with Aces exp with no problems what so ever and it *can* run 1946, but definately not as well as my modern gamer. My legacy gamer has Windows 98, Coppermine PIII 1GHz, 512Mb RDRAM, nVidia 128Mb DDR and a 34Gb hard drive dedicated for games only (D
...
So if you're running at minimum specs, you'll have to back off the settings way off and suffer occasional sketching, etc.
In other words, you're not going to be happy with it.