HP
908400-601
is compatible in the following HP Models:
HP Z600 Workstation series
HP Z640 WORKSTATION - 3EK17PP
HP Z640 WORKSTATION - 3EK18PP
HP Z640 WORKSTATION - 3SX79US
HP Z640 WORKSTATION - 4RY71US
HP Z640 WORKSTATION - V6G86EC
HP Z640 WORKSTATION - Z2D75UP
HP Z640 WORKSTATION - Z8S21US