Official specs from Steam

Rainbow Six Siege system requirements

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

Minimum

OSWindows 10, Windows 11 (64-bit versions)
ProcessorAMD Ryzen 3 3100 / Intel i3-8100
Memory8 GB RAM
GraphicsNvidia GTX 1650 4GB / AMD RX 5500XT 4GB / Intel ARC A380 6GB
DirectXVersion 12
NetworkBroadband Internet connection
Storage65 GB available space
Sound CardDirectX® 9.0c compatible sound card with latest drivers
Additional NotesFor an up-to-date list of supported chipsets, please visit the FAQ for this game on our support website. Game contains BattleEye anti-cheat technology.

Recommended

OSWindows 11 (64-bit versions)
ProcessorAMD Ryzen5 3600 / Intel i5-10400
Memory8 GB RAM
GraphicsNVIDIA RTX 2060 6GB / AMD RX 6600 8GB
DirectXVersion 12
NetworkBroadband Internet connection
Storage65 GB available space
Sound CardDirectX® 9.0c compatible sound card 5.1 with latest drivers
Additional NotesFor an up-to-date list of supported chipsets, please visit the FAQ for this game on our support website. Game contains BattleEye anti-cheat technology.

FAQ

What graphics card do I need for Rainbow Six Siege?

Minimum: Nvidia GTX 1650 4GB / AMD RX 5500XT 4GB / Intel ARC A380 6GB. Recommended: NVIDIA RTX 2060 6GB / AMD RX 6600 8GB.

How much RAM does Rainbow Six Siege need?

Rainbow Six Siege needs 8 GB RAM at minimum, 8 GB RAM recommended.

How big is Rainbow Six Siege?

Rainbow Six Siege requires 65 GB available space.

Does Rainbow Six Siege run on Mac or Steam Deck/Linux?

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