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Front view

This section contains information about the controls, LEDs, and connectors on the front of the server.

Figure 1. Front view

Table 1. Components on the front view
1 PCIe riser 17 USB 3.2 Gen 1 (5 Gbps) Type-A connectors
2 PCIe riser 28 XCC system management port
3 Front drive bays9 USB 3.2 Gen 1 (5 Gbps) Type-C connector with display support
4 Power supply unit bays10 External diagnostics handset connector
5 Grounding points11 OCP 3.0 module
6 USB 2.0 Type-A connector with Lenovo XClarity Controller management12 System buttons and LEDs

1 / 2 PCIe riser assemblies​

Install PCIe adapters into these riser assemblies. See the following table for PCIe slots corresponding to the PCIe riser assembly.

Note
Performance may degrade when a x16 PCIe adapter is installed in a x8 lane PCIe slot.
Table 2. PCIe riser assemblies and corresponding slots
PCIe riser assemblyPCIe slots (top to bottom)
1 PCIe riser 1

  • Slot 3: x16 (Gen5 x16 lanes)

  • Slot 4: x16 (Gen4 x8 lanes)

  • Slot 5: x16 (Gen4 x8 lanes)

Note
  • When the serial port module is installed, Slot 5 is not supported.
  • When a double-wide GPU is installed in Slot 3, Slot 4 is not supported.
2 PCIe riser 2
Note
PCIe riser 2 is optional. The models without PCIe riser 2 come with a riser blank filler.

  • Slot 6: x16 (Gen4 x8 lanes)

  • Slot 7: x16 (Gen5 x16 lanes)

  • Slot 8: x16 (Gen4 x8 lanes)

Note
  • Slot 6 and Slot 8 are not supported in the following configurations:
    • Front SATA drive backplane and internal NVMe drive backplane connect to the system board
    • Front NVMe drive backplane and internal NVMe drive backplane connect to the system board
  • When a double-wide GPU is installed in Slot 7, Slot 6 is not supported.

3 Front drive bays (Bay 0-3)​

Install 2.5-inch drives to these bays. See Install a front hot-swap drive for more information.

4 Power supply unit bays (PSU 1-2)​

Install power supply units to these bays, and connect power cords to the power supply units. Make sure the power cords are connected properly. SE455 V3 supports the following types of power supplies:

  • 1800-watt Platinum, input power 230 VAC

  • 1100-watt Titanium, input power 230 VAC

  • 1100-watt Platinum, input power 115-230 VAC

  • 1100-watt -48V DC power supply unit

For more information on the power supply LEDs, see Power supply LEDs.

5 Grounding points​

Connect the grounding wires to these threaded studs.

6 USB 2.0 Type-A connector with Lenovo XClarity Controller management​

Connection to Lenovo XClarity Controller is primarily intended for users with a mobile device running the Lenovo XClarity Controller mobile application. When a mobile device is connected to this USB port, an Ethernet over USB connection is established between the mobile application running on the device and the Lenovo XClarity Controller.

Only one mode is supported:

  • BMC only mode

    In this mode, the USB port is always solely connected to Lenovo XClarity Controller.

7 USB 3.2 Gen 1 (5 Gbps) Type-A connectors (USB Port 1-2)​

Connect a USB device, such as a mouse, keyboard, or other devices, to either of these connectors.

8 XCC system management port (1GbE RJ-45)​

The server has a 1GbE RJ-45 connector dedicated to Lenovo XClarity Controller (XCC) functions. Through the system management port, you can access the Lenovo XClarity Controller directly by connecting your laptop to the management port using an Ethernet cable. Make sure that you modify the IP settings on the laptop so that it is on the same network as the server default settings. A dedicated management network provides additional security by physically separating the management network traffic from the production network.

See the following for more information:
Note
In addition to the standard 1000 Mbps data transfer rate, the XCC system management port also supports 10 Mbps, 100 Mbps speeds.

9 USB 3.2 Gen 1 (5 Gbps) Type-C connector with display support (USB Port 3)​

Connect a USB device, such as a mouse, keyboard, monitor, or other devices, to either of this connector. This connector supports display.

10 External diagnostics handset connector​

Connect the external diagnostics handset to this connector. See External Diagnostics Handset for more details.

11 OCP 3.0 module (Slot 9)​

Slot 9 is with NC-SI support.

The system may support a 2-port or a 4-port OCP module for network connections. Port numbering are shown in the illustrations below.
Figure 2. Port numbering — 2-port OCP module
Port numbering — 2-port OCP 3.0 Ethernet adapter
Figure 3. Port numbering — 4-port OCP 3.0 module
Port numbering — 4-port OCP 3.0 Ethernet adapter

12 System buttons and LEDs​

The buttons and LEDs provide controls and system status. The following buttons and LEDs are in this area:

  • Power button with power status LED (green)

  • Security LED (green)

  • NMI button

    Press this button to force a nonmaskable interrupt to the processor. You might have to use a pen or the end of a straightened paper clip to press the button. You can also use it to force a blue-screen memory dump. Use this button only when you are directed to do so by Lenovo Support.

  • Network activity LED (green)

  • System ID button with system ID LED (blue)

  • System error LED (yellow)

See Front LEDs for more information.

Front I/O fillers​

Install the I/O fillers when the connectors are not used. The connectors could be damaged without proper protection of the fillers.

Figure 4. Front I/O fillers

1 Security bezel slot filler (x2)4 RJ-45 filler (x1)
2 External diagnostic handset connector filler (x1)5 USB Type-A filler (x3)
3 USB Type-C filler (x1)