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 view	Supported 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.

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 module	3. Standard form factor (SFF) RAID/HBA adapter
2. Custom form factor (CFF) internal HBA/RAID adapter	4. Network adapter

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

PCIe adapter	Maximum supported	Suggested 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

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