In order for you to play Forza Horizon 4 on Windows with minimal graphics settings, your computer must meet the following requirements
Requires a 64-bit processor and operating system
Operating System:
Windows 10 version 15063.0 or higher
Processor (CPU):
Intel i3-4170 @ 3.7Ghz OR Intel i5 750 @ 2.67Ghz
Memory (RAM):
8 GB RAM
Graphics Card:
NVidia 650TI OR AMD R7 250x
DirectX:
Version 12
Network:
Broadband Internet connection
Storage:
80 GB available space
In order to play Forza Horizon 4 on Windows with maximum graphics settings, you need a computer with a configuration no worse than the following
Requires a 64-bit processor and operating system
Operating System:
Windows 10 version 15063.0 or higher
Processor (CPU):
Intel i7-3820 @ 3.6Ghz
Memory (RAM):
12 GB RAM
Graphics Card:
NVidia GTX 970 OR NVidia GTX 1060 3GB OR AMD R9 290x OR AMD RX 470
DirectX:
Version 12
Network:
Broadband Internet connection
Storage:
100 GB available space