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PCIe slots and configurations

Slot configurations

The server supports up to 8 PCIe slots on the rear. The PCIe slot configurations vary by server model.

Note
The slots defined in the UEFI setting are slightly different from the physical slots. For information about slots defined in the UEFI setting, refer to:
Server rear viewPCIe slots


Slots 1–3 on riser 1:

  • Type 1: x16/x8/x8

  • Type 2: x16/x16/E

  • Type 3: E/x16/x16

Slots 4–6 on riser 2:

  • Type 1: x16/x8/x8

  • Type 2: x16/x16/E

  • Type 3: E/x16/x16

Slots 7–8 on riser 3:

  • Type 1: x16/x16

  • Type 2: x8/x8



Slots 1–3 on riser 1:

  • Type 1: x16/x8/x8

  • Type 2: x16/x16/E

  • Type 3: E/x16/x16

Slots 4–6 on riser 2:

  • Type 1: x16/x8/x8

  • Type 2: x16/x16/E

  • Type 3: E/x16/x16

NA


Slots 1–3 on riser 1:

  • Type 1: x16/x8/x8

  • Type 2: x16/x16/E

  • Type 3: E/x16/x16

Slot 6 on riser 2: x16

NA


Slots 1–3 on riser 1:

  • Type 1: x16/x8/x8

  • Type 2: x16/x16/E

  • Type 3: E/x16/x16

Slot 6 on riser 2: x16

NA


Slot 3 on riser 1: x16

Slot 6 on riser 2: x16

NA

PCIe adapter and slot priority

The following table lists the recommended physical slot sequence for common PCIe adapters.

PCIe adaptersMax. qty.Slot priority

GPU

Single-wide LPHL (40W/75W)

8

  • 1 CPU: 1, 2, 3, 7

  • 2 CPU: 1, 4, 5, 6, 7, 8, 2, 3

Single-wide FHFL (150W)

3

  • 1 CPU: 1, 7

  • 2 CPU: 1, 4, 7

Double-wide FHFL (250W/300W)

3

  • 1 CPU: 2, 7

  • 2 CPU: 2, 5, 7

Note
To install a double-wide GPU, one of the riser cages is required:
  • E/x16/x16 Riser 1/2 cage

  • x16/x16 Riser 3 cage

NIC

Xilinx Alveo U25 FPGA

2

  • 1 CPU: 1

  • 2 CPU: 1, 4

  • 2 CPU + 1 A100 GPU: 3, 4

Xilinx Alveo U50 FPGA

6

  • 1 CPU: 1

  • 2 CPU: 1, 4, 2, 5, 7, 8

Broadcom 57508 100GbE 2-port

6

  • 1 CPU: 1, 2, 3, 7

  • 2 CPU: 1, 4, 2, 5, 3, 6, 7, 8

Note
The Broadcom 57454 10/25GbE SFP28 4-port PCIe Ethernet Adapter_Refresh (V2) requires a full-height bracket and must be installed in a full-height slot.

Broadcom 57454 10/25GbE SFP28 4-port PCIe Ethernet Adapter_Refresh (V2)

Mellanox ConnectX-6 HDR100 IB/100GbE VPI 1-port

Mellanox ConnectX-6 HDR100 IB/100GbE VPI 2-port

Mellanox ConnectX-6 HDR100 IB/200GbE VPI 2-port

Mellanox ConnectX-6 Dx 100GbE 2-port

Intel E810-DA4 10/25GbE SFP28 4-port

Others

8

  • 1 CPU: 2, 3, 1, 7

  • 2 CPU: 2, 5, 3, 6, 7, 8, 1, 4

Note
The Broadcom 57454 10/25GbE SFP28 4-port PCIe Ethernet Adapter requires a full-height bracket and must be installed in a full-height slot.

Internal SFF RAID/HBA

430-8i/4350-8i HBA

4

  • 1 CPU: 2, 3, 1, 7

  • 2 CPU: 2, 3, 5, 6, 7, 8, 1, 4

530-8i/5350-8i/540-8i/930-8i/940-8i RAID

430-16i/4350-16i/440-16i HBA

1

  • 1 CPU: 2, 3, 1, 7

  • 2 CPU: 2, 3, 5, 6, 7, 8, 1, 4

530-16i/540–16i/930-16i/940-16i/940-32i RAID

9350-8i

4
  • 1 CPU: 3, 2, 1, 7

  • 2 CPU: 3, 2, 5, 6, 7, 8, 1, 4

9350-16i

1

Internal CFF RAID/HBA/RAID expander

1

Front chassis

External RAID/HBA

930-8e/940–8e RAID

4

NA

Others

8

NVMe Switch/retimer

NVMe switch

4

  • 32 NVMe config: 1, 2, 4, 5

  • 16 NVMe config:
    • 1 CPU: 1, 2, 3

    • 2 CPU: 1, 2, 4, 5, 3, 6, 7, 8

Retimer card

4

  • 24 NVMe config: 1, 2, 4, 5

  • 16/8 NVMe config:
    • 1 CPU: 1, 2, 3

    • 2 CPU: 1, 2, 4, 5, 3, 6, 7, 8

Note
CM6-V, CM6-R and CM5-V NVMe drives are not supported when a system is configured with Retimer cards.

FC HBA

8

  • 1 CPU: 2, 3, 1, 7

  • 2 CPU: 2, 5, 3, 6, 7, 8, 1, 4

Note
For more information about supported FC HBA adapters, see https://lenovopress.com/lp1269-thinksystem-sr665-server#fibre-channel-host-bus-adapters.

PCIe SSD

8

  • 1 CPU: 2, 3, 1, 7

  • 2 CPU: 2, 5, 3, 6, 7, 8, 1, 4

7mm drive cage

1

Slot 3 or 6

Serial port module

1

Slot 3 or 6

OCP 3.0

1

OCP slot

RAID rules

  • Gen3 and Gen4 cannot be installed together on one riser card.

  • RAID controllers of the same PCIe generation group can be installed on one riser card.

  • RAID and HBA controllers can be installed on one riser card.

  • The RAID/HBA 4350/5350/9350 adapters cannot be mixed with the following adapters in the same system:

    • Intel E810-DA2 OCP/PCIe Ethernet adapter

    • Intel E810-DA4 OCP/PCIe Ethernet adapter

    • RAID/HBA 430/530/930 adapters

    • RAID/HBA 440/940/540 adapters, except for external RAID/HBA 440-8e/440-16e/940-8e adapters

  • PCIe SSD does not support RAID function.

  • The RAID 940-8i or RAID 940-16i adapter supports Tri-mode. When Tri-mode is enabled, the server supports SAS, SATA and U.3 NVMe drives at the same time. NVMe drives are connected via a PCIe x1 link to the controller.

    Note
    To support Tri-mode with U.3 NVMe drives, U.3 x1 mode must be enabled for the selected drive slots on the backplane through the XCC Web GUI. Otherwise, the U.3 NVMe drives cannot be detected. For more information, see U.3 NMVe drive can be detected in NVMe connection, but cannot be detected in Tri-mode.
  • The HBA 430/440 adapters do not support the Self-Encrypting Drive (SED) management feature.

  • 930/9350/940 RAID controllers require a super capacitor.

  • Oversubscription occurs when the system supports 32 NVMe drives using NVMe switch adapters. For details, see NVMe drive support.