Because as a minimum you need a graphics card on the level of a GeForce GTX 1060 or an AMD R9 390X. It should also be an Intel Core i5 or an AMD Ryzen 5. However, this does not allow for too big leaps, because there are only 30 frames per second in a 1080p resolution with low graphics settings. If you want to enjoy the full program including ultra settings and ray tracing, you should have an Intel Core i7-9700 and a GeForce RTX 3080.
Worth reading: The Medium in the large preview of PC Games
At least you still have some time to upgrade your computer if necessary. Here the "normal" hardware requirements in the overview, the picture below the message also shows the ray tracing requirements:
Minimum (1080p / 30 fps, low preset)
OS: Windows 10 64 bit CPU: Intel Core i5-6600 or AMD Ryzen 5 GPU: GeForce 1650 Super or GTX 1060, or AMD R9 390X RAM: 8 GByre Storage: 50 GByre HDD DirectX: 11 Recommended (1080p / 30 fps, medium preset)
OS: Windows 10 64 bit CPU: Intel Core i5-9600 or AMD Ryzen 3700 X GPU: GeForce GTX 1660 Super or AMD RX 5600XT 6 GByte RAM: 16 GByre Storage: 50 GByre SSD DirectX: 11 High (1440p / 30 fps, high present)
OS: Windows 10 64 bit CPU: Intel Core i5-9600 or AMD 3700 X GPU: GeForce RTX 2060 Super or AMD 5700 XT RAM: 16 GByte Storage: 50 GByte SSD DirectX: 11 Ultra (2160p / 30 fps, high preset)
OS: Windows 10 64 bit CPU: Intel Core i7-9700 or AMD Ryzen 7 3700 X GPU: GeForce RTX 2080 8GB or RTX 3060 Ti or AMD RX 6800 16GB RAM: 16 GByte Storage: 50 GByrt SSD DirectX : 11 The system requirements for the horror game The Medium are steep. (7) Source: Bloober Team Source: Bloober Team