HP
864651-001
is compatible in the following HP Models:
Intel Xeon Processors
HP Z640 XEON E5-2690V4 2.6GHZ 2400MHZ 14 CORE 2ND CPU - T9U23AA
HP Z840 XEON E5-2690V4 2.6GHZ 2400MHZ 14 CORE 2ND CPU - T9U41AA