Official specs from Steam

Space Engineers system requirements

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

Minimum

OSMicrosoft Windows 10 (latest SP) 64-bit
ProcessorIntel i5 @ 3.0 GHz or higher (or AMD equivalent)
Memory8 GB RAM
GraphicsGeforce 750/Radeon R9 270X or higher
DirectXVersion 11
Storage35 GB available space
Sound CardDirectX® compatible on-board
Additional NotesNo internet connection needed for single player, but for multiplayer we recommend 5Mbit/s or more

Recommended

OSMicrosoft Windows 10 (latest SP) 64-bit
ProcessorIntel Quad Core i7 @ 4.5 GHz or higher (or AMD equivalent)
Memory16 GB RAM
GraphicsGeforce 1070 GTX / Radeon RX Vega 56 or higher
DirectXVersion 11
Storage35 GB available space
Sound CardDirectX® compatible on-board
Additional NotesNo internet connection needed for single player, but for multiplayer we recommend 5Mbit/s or more

FAQ

What graphics card do I need for Space Engineers?

Minimum: Geforce 750/Radeon R9 270X or higher. Recommended: Geforce 1070 GTX / Radeon RX Vega 56 or higher.

How much RAM does Space Engineers need?

Space Engineers needs 8 GB RAM at minimum, 16 GB RAM recommended.

How big is Space Engineers?

Space Engineers requires 35 GB available space.

Does Space Engineers run on Mac or Steam Deck/Linux?

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