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PCIe slots and adapters

Understanding the technical rules for PCIe adapters helps you correctly install and configure PCIe adapters in the system.

PCIe adapters supported for different models

Table 1. PCIe adapters supported and their locations
Server rear viewSupported types and slot location


Riser 1 assembly
  • Slot 1: PCIe x16 (x8, x4, x1), low-profile

  • Slot 2: PCIe x16 (x8, x4, x1), low-profile

Riser 2 assembly
  • Slot 3: PCIe x16 (x8, x4, x1), low-profile



Riser 1 assembly
  • Slot 1: PCIe x16 (x8, x4, x1), low-profile

  • Slot 2: PCIe x16 (x8, x4, x1), full-height

Note
One rear wall bracket must be installed next to the two PCIe slots.

PCIe adapter installation rules and order

When installing different types of PCIe adapters, refer to the following suggested installation priority:

Table 2. Recommended installation priority for different types of PCIe adapters
Installation priority
1. OCP module3. Standard form factor (SFF) RAID/HBA adapter
2. Custom form factor (CFF) internal HBA/RAID adapter4. Network adapter

Supported PCIe adapters and slot priorities

The following table lists the recommended slot installation priority for common PCIe adapters.

PCIe adapterMaximum supportedSuggested slot priority
Internal SFF RAID/HBA adapter

ThinkSystem RAID 940-16i 4GB Flash PCIe Gen4 12Gb Adapter

1
  • slot: 1

NIC adapter

ThinkSystem Mellanox ConnectX-6 Lx 10/25GbE SFP28 2-port PCIe Ethernet Adapter

ThinkSystem Broadcom 57414 10/25GbE SFP28 2-port PCIe Ethernet Adapter

ThinkSystem Broadcom 5719 1GbE RJ45 4-port PCIe Ethernet Adapter

3
  • slot: 1, 2, 3

ThinkSystem Mellanox ConnectX-6 Dx 100GbE QSFP56 2-port PCIe Ethernet Adapter

3
  • slot: 1, 2, 3

Note
  • RAID 940 series adapters require a RAID flash power module.