Hi Thomas,
there you can see the HW usage in each process step:
Alignment:
Feature detection (CPU, RAM, Storage only)
Matching (CPU, RAM, Storage only)
Aligning Images (CPU, RAM, Storage only)
Processing (CPU, RAM, Storage only)
Reconstruction:
Depth map calculation (Storage, RAM, GPU - CUDA, Vram only)
Decompose for Large scene reconstruction
Depth map Grouping (CPU, RAM, Storage only)
Model creation / Meshing (CPU, RAM, Storage only)
Meshing (CPU, RAM, Storage only)
UV unwrap (CPU, Storage, RAM only)
Texture reprojection (CPU, Storage, RAM only)
Texturing:
Model preprocessing (Storage, RAM, light CPU, GPU - CUDA, Vram only)
Model Texturing (heavy CPU, Storage, RAM only)