Actually, the max condition yet not shared due to minimum, and recommended enough according to the game. You can also check the price of the game Check Price
Fsx Steam Edition Falcon 7X Add On System Requirements Minimum
According to the minimum you must have whatever described below table. Do consideration.
2.0 Ghz or higher (single core)
DirectX®9 compliant video card or greater, 256 MB video RAM or higher, Shader Model 1.1 or higher (Laptop versions of these chipsets may work but are not supported. Updates to your video and sound card drivers may be required)