HP 644315-001 Z820 Workstation 80mm Rear Dual Fan DC 12V 0.35A Intel they must be added in

they must be added in like pairs to take advantage of memory interleaving

The HP 496057-001 is a PCIe riser board providing 2×PCIe x4 and 1×PCIe x8 expansion slots for HP ProLiant DL380 G6

Part Number: ST4000NM0033

Compatible With: Dell Precision T3600

The HP MB4000FCWK (ST4000NM0023) is a genuine 4TB 7

HP 644315-001 Z820 Workstation 80mm Rear Dual Fan DC 12V 0.35A Intel they must be added inThe HP 644315 001 is an 80mm 12V DC 0. 35A rear dual fan assembly for the HP Z820 Workstation. It provides the rear chassis dual fan module required for proper airflow and thermal management in the HP Z820 high end workstation, enabling fan replacement for Z820 systems experiencing rear fan failures or requiring preventive fan maintenance. Part Number: 644315 001 Type: 80mm Rear Dual Fan Assembly (12V DC, 0. 35A) Compatible With: HP Z820 Workstation