Here are the Microsoft Flight Simulator 2020 System Requirements (Minimum)
CPU: Intel Core i5-4460 or AMD Ryzen 3 1200 or better
RAM: 8 GB
VIDEO CARD: Radeon RX 570 or GeForce GTX 770 or better
DEDICATED VIDEO RAM: 2048 MB
PIXEL SHADER: 5.0
VERTEX SHADER: 5.0
OS: Windows 10 64-bit
FREE DISK SPACE: 150 GB

Microsoft Flight Simulator 2020 Recommended Requirements
CPU: Intel Core i5-8400 or AMD Ryzen 5 1500X or better
RAM: 16 GB
VIDEO CARD: Radeon RX 590 or GeForce GTX 970
DEDICATED VIDEO RAM: 4096 MB
PIXEL SHADER: 5.1
VERTEX SHADER: 5.1
OS: Windows 10 64-bit
FREE DISK SPACE: 150 GB