Workstation GPUs occupy the middle ground between consumer and datacenter tiers. They use professional-grade drivers (with certified support for software like AutoCAD, Solidworks, DaVinci Resolve), ECC memory in many cases, and target professional workstations rather than gaming PCs or server racks.
NVIDIA's RTX 6000 Ada Generation, RTX 5000 Ada, RTX A6000, and the new RTX PRO 6000 Blackwell Workstation are typical examples. AMD has the Radeon PRO series.
Workstation cards often have larger VRAM than equivalent-tier consumer cards (e.g., RTX 6000 Ada with 48 GB vs RTX 4090 with 24 GB) and tend to be used for VFX, simulation, ML R&D, and other professional workflows. AIMC's index includes workstation-class cards in its canonicalization and displays them in their own category.