HP
864648-001
is compatible in the following HP Models:
Intel Xeon Processors
HP Z640 XEON E5-2667V4 3.2GHZ 2400MHZ 8 CORE 2ND CPU - T9U20AA
HP Z840 XEON E5-2667V4 3.2GHZ 2400MHZ 8 CORE 2ND CPU - T9U37AA