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Rear view

The rear of the server provides access to several connectors and components, including the power supplies, PCIe adapters, hot-swap drive bays, serial port, and Ethernet connectors.

Rear view of server model with three PCIe slots​

The following illustration shows the rear view of server model with three PCIe slots. Depending on the model, your server might look slightly different from the illustration below.
Figure 1. Rear view of server model with three PCIe slots
Rear view of server model with three PCIe slots

Table 1. Components on the rear of the server
1 PCIe slot 1 on riser 1 assembly2 PCIe slot 2 on riser 2 assembly
3 PCIe slot 3 on riser 2 assembly4 Power supply 1
5 Power supply 2 (optional)6 NMI button
7 Serial port8 USB 3.2 Gen 1 (5 Gbps) connectors
9 VGA connector10 RJ45 BMC management network connector
11 Ethernet connectors on OCP 3.0 Ethernet adapter (optional, two or four connectors may be available) 

1 PCIe slot 1 on riser 1 assembly

Your server supports the following riser card for riser 1 assembly:

  • Slot 1: PCIe x16, low-profile

2 3 PCIe slots on riser 2 assembly

Your server supports the following riser card configurations for riser 2 assembly:

Type 1:

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

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

Type 2:

  • Slot 2: no riser card installed

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

Rear view of server model with two PCIe slots​

The following illustration shows the rear view of the server model with two PCIe slots. Depending on the model, your server might look slightly different from the illustration below.
Figure 2. Rear view of server model with two PCIe slots
Rear view of server model with two PCIe slots

Table 2. Components on the rear of the server
1 PCIe slot 1 on riser 1 assembly2 PCIe slot 3 on riser 2 assembly
3 Power supply 14 Power supply 2 (optional)
5 NMI button6 Serial port
7 USB 3.2 Gen 1 (5 Gbps) connectors8 VGA connector
9 BMC management network connector10 Ethernet connectors on OCP 3.0 Ethernet adapter (optional, two or four connectors may be available)

1 PCIe slot 1 on riser 1 assembly

Your server supports the following riser card for riser 1 assembly:

Slot 1: PCIe x16 (x16, x8, x4, x1), full-height, full-length

2 PCIe slot 3 on riser 2 assembly

Your server supports the following riser card for riser 2 assembly:

Slot 3: PCIe x16 (x16, x8, x4, x1), low-profile

Rear view of server model with two hot-swap drive bays and one PCIe slot​

The following illustration shows the rear view of the server model with two hot-swap drive bays and one PCIe slot. Depending on the model, your server might look slightly different from the illustration below.
Figure 3. Rear view of server model with two hot-swap drive bays and one PCIe slot
Rear view of server model with two hot-swap drive bays and one PCIe slot

Table 3. Components on the rear of the server
1 PCIe slot 12 Rear 2.5-inch drive bays
3 Power supply 14 Power supply 2 (optional)
5 NMI button6 Serial port
7 USB 3.2 Gen 1 (5 Gbps) connectors8 VGA connector
9 BMC management network connector10 Ethernet connectors on OCP 3.0 Ethernet adapter (optional, two or four connectors may be available)
1 PCIe slot 1

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

2 Rear 2.5-inch drive bays

Used to install two 2.5-inch hot-swap drives on the rear of the server.

The number of the installed drives in your server varies by model. When you install drives, follow the order of the drive bay numbers.

The EMI integrity and cooling of the server are protected by having all drive bays occupied. The vacant drive bays must be occupied by drive bay fillers or drive fillers.

Rear view of server model with one PCIe slot​

The following illustration shows the rear view of the server model with one PCIe slot. Depending on the model, your server might look slightly different from the illustration below.
Figure 4. Rear view of server model with one PCIe slot
Rear view of server model with one PCIe slot

Table 4. Components on the rear of the server
1 PCIe slot 1 on riser 1 assembly2 Power supply 1
3 Power supply 2 (optional)4 NMI button
5 Serial port6 USB 3.2 Gen 1 (5 Gbps) connectors
7 VGA connector8 BMC management Ethernet connector
9 Ethernet connectors on OCP 3.0 Ethernet adapter (optional, two or four connectors may be available) 
1 PCIe slot 1

Slot 1: PCIe x16 (x16, x8, x4, x1), full-height/full-length

Rear view of server model with no PCIe slot​

The following illustration shows the rear view of the server model with no PCIe slot. Depending on the model, your server might look slightly different from the illustration below.
Figure 5. Rear view of server model with no PCIe slot
Rear view of server model with no PCIe slot

Table 5. Components on the rear of the server
1 Power supply 12 Power supply 2 (optional)
3 NMI button4 Serial port
5 USB 3.2 Gen 1 (5 Gbps) connectors6 VGA connector
7 BMC management network connector8 Ethernet connectors on OCP 3.0 Ethernet adapter (optional, two or four connectors may be available)
The following are common components on the rear view of different models:

  • Power supply 1

  • Power supply 2 (optional)

    The hot-swap redundant power supplies help you avoid significant interruption to the operation of the system when a power supply fails. You can purchase a power supply option from Lenovo and install the power supply to provide power redundancy without turning off the server.

    On each power supply, there are three status LEDs near the power cord connector. For information about the LEDs, see Rear view LEDs.

  • NMI button

    Press this button to force a nonmaskable interrupt (NMI) to the processor. By this way, you can make the operating system halt (such as Windows Blue Screen of Death) and take a memory dump. You might have to use a pen or the end of a straightened paper clip to press the button.

  • Serial port

    Used to connect to the host system serial interface.

  • USB 3.2 Gen 1 (5 Gbps) connectors (2)

    Used to attach a device that requires a USB 2.0 or 3.1 connection, such as a USB keyboard, USB mouse, or USB storage device.

  • VGA connector

    Used to attach a high-performance monitor, a direct-drive monitor, or other devices that use a VGA connector.

  • BMC management network connector

    Used to attach an Ethernet cable to manage the baseboard management controller (BMC).

  • Ethernet connectors on OCP 3.0 Ethernet adapter (optional)

    Figure 6. OCP module (two connectors)
    OCP module (two connectors)

    Figure 7. OCP module (four connectors)
    OCP module (four connectors)

    Note

    • The OCP 3.0 Ethernet adapter provides two or four extra Ethernet connectors for network connections.

    • Any of the connectors (connector 1 by default) on the OCP module can function as a shared management connector.