Official specs from Steam

Mount & Blade II: Bannerlord system requirements

Minimum and recommended PC specs as listed by the developer on Steam.

Minimum

NoteRequires a 64-bit processor and operating system
OS *Windows 7 (64-bit only)
ProcessorIntel® Core™ i3-8100 / AMD Ryzen™ 3 1200 / Snapdragon X Elite
Memory6 GB RAM
GraphicsIntel® UHD Graphics 630 / NVIDIA® GeForce® GTX 660 2GB / AMD Radeon™ HD 7850 2GB
Storage60 GB available space
Additional NotesIntegrated GPUs require additional 2GB of system RAM.

Recommended

NoteRequires a 64-bit processor and operating system
OSWindows 10 (64-bit only)
ProcessorIntel® Core™ i5-9600K / AMD Ryzen™ 5 3600X
Memory8 GB RAM
GraphicsNVIDIA® GeForce® GTX 1060 3GB / AMD Radeon™ RX 580
Storage60 GB available space
Additional Notes

FAQ

What graphics card do I need for Mount & Blade II: Bannerlord?

Minimum: Intel® UHD Graphics 630 / NVIDIA® GeForce® GTX 660 2GB / AMD Radeon™ HD 7850 2GB. Recommended: NVIDIA® GeForce® GTX 1060 3GB / AMD Radeon™ RX 580.

How much RAM does Mount & Blade II: Bannerlord need?

Mount & Blade II: Bannerlord needs 6 GB RAM at minimum, 8 GB RAM recommended.

How big is Mount & Blade II: Bannerlord?

Mount & Blade II: Bannerlord requires 60 GB available space.

Does Mount & Blade II: Bannerlord run on Mac or Steam Deck/Linux?

There is no native macOS version. There is no native Linux build (Proton compatibility may vary).