Grim Dawn: Fangs of Asterkarn System Requirements
Minimum
OSWindows XP/Vista/7/8/10
Processor2.3 GHz dual-core CPU
Memory4 GB
GraphicsDirectX 10 compatible, 1GB VRAM, Shader Model 4.0
Storage5 GB
Recommended
OSWindows 7/8/10
Processor3.2 GHz quad-core CPU
Memory8 GB
GraphicsDirectX 11 compatible, 2GB VRAM, Shader Model 5.0
Storage5 GB
Source: Official Steam store page, confirmed unanimous across multiple independent sources
These are the base game's official long-standing specs, genuinely modest for a 2016-era ARPG. Fangs of Asterkarn's expanded region and visual upgrades (HDR lighting, new art) may push actual storage usage somewhat higher than the base 5GB figure, though Crate Entertainment has not published an updated official figure specific to the expansion as of this writing.