P51083-B21 HPE DL380 Gen11 x16/x16/x16 Secondary Riser Kit

P51083‑B21 is a secondary PCIe riser expansion kit designed exclusively for the HPE ProLiant DL380 Gen11 2U rack server. It adds three full‑bandwidth PCIe 5.0 x16 slots to extend high‑speed I/O capabilities for GPUs, high‑performance NICs, NVMe storage adapters, and other enterprise expansion cards. This kit is intended for deployments requiring dense, high‑performance PCIe expansion beyond the primary riser.

• Three PCIe 5.0 x16 Slots: Delivers full 32 GT/s per‑lane bandwidth for next‑generation expansion cards
• Slot Configuration:
  • Slot 4: PCIe 5.0 x16, Full‑Height, Full‑Length (FHFL)
  • Slot 5: PCIe 5.0 x16, Full‑Height, Full‑Length (FHFL)
  • Slot 6: PCIe 5.0 x16, Full‑Height, Half‑Length (FHHL)
• Secondary Riser Position: Installed in the secondary riser bay, routed to the second CPU (CPU 2) — requires a second processor to be installed
• Cable‑Dependent Slot Enablement:
  • Slot 4 is disabled by default; requires the P56074‑B21 Secondary 3x16 Cable Kit to activate
  • Without the cable kit, only Slots 5 and 6 are functional
• Tool‑Less Installation: Designed for quick, hot‑swap compatible deployment in DL380 Gen11 chassis
• Optimized Airflow: Engineered to maintain server cooling efficiency with high‑power add‑in cards

• Server Platform: HPE ProLiant DL380 Gen11 2U Rack Server only
• Processor Requirement: Dual CPU configuration mandatory (CPU 2 must be present)
• Required Accessory: P56074‑B21 Secondary 3x16 Cable Kit (to enable Slot 4)
• Primary Riser Pairing: Complements the primary riser (P48803‑B21) for a total of up to six PCIe 5.0 x16 slots

1. Second CPU Required: The secondary riser connects exclusively to CPU 2; a single‑CPU system cannot use this kit
2. Cable Kit for Full Functionality: To use all three slots, you must order the P56074‑B21 Secondary 3x16 Cable Kit separately
3. Use Cases: Ideal for GPU‑accelerated computing, high‑speed networking (100/200/400GbE), NVMe over Fabrics, and storage controller expansion
4. Cooling Consideration: High‑power GPUs in FHFL slots may require upgraded fan kits for optimal thermal performance