The bear minimum required specs are listed below. If your PC can't reach these performance levels, you won't be able to run Unbound, even on the lowest settings:
64-bit processor and operating system
OS: Windows 10 64-bit
Processor: Ryzen 5 2600, Core i5-8600
Memory: 8 GB RAM
Graphics: RX 570, GTX 1050 Ti
DirectX: Version 12
Network: Broadband Internet connection
Storage: 50 GB available space
If your PC can surpass the minimum requirements, you may well meet the recommended specs. If your PC has these specs, you'll be able to run Unbound on a decent setting without compromising the frame rate:
Requires a 64-bit processor and operating system
OS: Windows 10 64-bit
Processor: Ryzen 5 3600, Core i7-8700
Memory: 16 GB RAM
Graphics: Radeon RX5700 (8GB), GeForce RTX 2070 (8GB)
DirectX: Version 12
Network: Broadband Internet connection
Storage: 50 GB available space