HP Z1 G2 Z820 AIO WS Nvidia Quadro K2100M 2GB GDDR5 All-In-One Workstation Video Graphics Card with Heatsink 729545-001 725327-001.Nvidia Model Number: Quadro K2100MHP Part Number: 729545-001Compatible Part Numbers: 725327-001Compatible Models: HP Z1 G2, Z820 AIO Workstations