Rear view

• Rear view of 3 x PCIe slots configuration

• Rear view of 2 x PCIe slots configuration

• Rear view of 2 x 2.5-inch drives and 1 x PCIe slot configuration

• Rear view of 2 x PCIe slots and 1 x Processor Neptune Core Module configuration

• Rear view of 1 x NeptCore module and 2 x rear M.2 drives configuration

Rear view of 3 x PCIe slots configuration​

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 with two low profile and one full height PCIe adapters

1 Power supply unit 1	2 PCIe slot 1 on riser 1 assembly
3 PCIe slot 2 on riser 1 assembly	4 System ID LED
5 System error LED	6 RoT fault LED
7 PCIe slot 3 on riser 2 assembly	8 Power supply unit 2
9 Ethernet connectors on rear OCP module 2 (optional)	10 XCC system management port (10/100/1000 Mbps RJ-45)
11 USB 3.2 Gen 1 (5Gbps) connector with USB 2.0 XCC system management (depending on the configuration)	12 USB 3.2 Gen 1 (5Gbps) connectors
13 VGA connector	14 Ethernet connectors on rear OCP module 1 (optional)

Rear view of 2 x PCIe slots configuration​

The following illustration shows the rear views 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 with two full height PCIe adapters

1 Power supply unit 1	2 PCIe slot 1 on riser 1 assembly
3 System ID LED	4 System error LED
5 RoT fault LED	6 PCIe slot 3 on riser 2 assembly
7 Power supply unit 2	8 Ethernet connectors on rear OCP module 2 (optional)
9 XCC system management port (10/100/1000 Mbps RJ-45)	10 USB 3.2 Gen 1 (5Gbps) connector with USB 2.0 XCC system management (depending on the configuration)
11 USB 3.2 Gen 1 (5Gbps) connectors	12 VGA connector
13 Ethernet connectors on rear OCP module 1 (optional)

Rear view of 2 x 2.5-inch drives and 1 x PCIe slot configuration​

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 4. Rear view of 2 x 2.5-inch drive and 1 x PCIe slot configuration

1 Power supply unit 1	2 PCIe slot 1 on riser 1 assembly
3 Rear 2.5-inch drive bays (2)	4 System ID LED
5 System error LED	6 RoT fault LED
7 Power supply unit 2	8 Ethernet connectors on rear OCP module 2 (optional)
9 XCC system management port (10/100/1000 Mbps RJ-45)	10 USB 3.2 Gen 1 (5Gbps) connector with USB 2.0 XCC system management (depending on the configuration)
11 USB 3.2 Gen 1 (5Gbps) connectors	12 VGA connector
13 Ethernet connectors on rear OCP module 1 (optional)

Rear view of 2 x PCIe slots and 1 x Processor Neptune Core Module configuration​

The following illustration shows the rear view of the server model with two PCIe slots and a Processor Neptune^® Core Module (NeptCore). Depending on the model, your server might look slightly different from the illustration below.

1 Power supply unit 1	2 PCIe slot 1 on riser 1 assembly
3 Hose holder	4 Inlet hose
5 Outlet hose	6 PCIe slot 3 on riser 2 assembly
7 Power supply unit 1	8 Ethernet connectors on rear OCP module 2 (optional)
9 RoT fault LED	10 System error LED
11 System ID LED	12 XCC system management port (10/100/1000 Mbps RJ-45)
13 USB 3.2 Gen 1 (5Gbps) connector with USB 2.0 XCC system management (depending on the configuration)	14 USB 3.2 Gen 1 (5Gbps) connectors
15 VGA connector	16 Ethernet connectors on rear OCP module 1 (optional)

Rear view of 1 x NeptCore module and 2 x rear M.2 drives configuration​

The following illustration shows the rear view of the server model with a Processor Neptune Core Module and rear M.2 drives. Depending on the model, your server might look slightly different from the illustration below.

Table 1. Components on the rear of the server

1 Power supply unit 1	2 PCIe slot 1 on riser 1 assembly
3 Hose holder	4 Inlet hose
5 Outlet hose	6 System ID LED
7 System error LED	8 RoT fault LED
9 Rear M.2 drive assembly	10 Power supply unit 2
11 Ethernet connectors on rear OCP module 2 (optional)	12 XCC system management port (10/100/1000 Mbps RJ-45)
13 USB 3.2 Gen 1 (5Gbps) connector with USB 2.0 XCC system management (depending on the configuration)	14 USB 3.2 Gen 1 (5Gbps) connectors
15 VGA connector	16 Ethernet connectors on rear OCP module 1 (optional)

Rear components overview​

Ethernet connectors​

Figure 5. OCP module (two connectors)

Figure 6. OCP module (four connectors)

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

• By default, any Ethernet connector on the OCP module can also function as a management connector using the shared management capacity.

Hot-swap drives and drive bays​

The drive bays on the front and rear of your server are designed for hot-swap drives. 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. Vacant drive bays must be occupied by drive fillers.

PCIe slots​

The PCIe slots are on the rear of the server and your server supports up to three PCIe slots on riser 1 and 2 assemblies.

Power supply units​

The hot-swap redundant power supply helps 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 System LEDs and diagnostics display.

USB 3.2 Gen 1 (5Gbps) connector with USB 2.0 XCC system management (depending on the configuration)​

The connector can function as a regular USB 3.2 Gen 1 connector to the host OS; it can be used to attach a USB-compatible device, such as a USB keyboard, USB mouse, or USB storage device.

When there are no USB connectors at the front, this connector can function as a USB 2.0 Lenovo XClarity Controller management port. 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.

For details about using the Lenovo XClarity Mobile app, refer to Lenovo XClarity Administrator Mobile app online documentation.

VGA connector​

The VGA connectors at the rear of the server can be used to attach a high-performance monitor, a direct-drive monitor, or other devices that use a VGA connector.

XCC system management port (10/100/1000 Mbps RJ-45)​

The XClarity Controller network connector can be used to attach an Ethernet cable to manage the baseboard management controller (BMC).

Rear LEDs​

• For more information about the LEDs on the XCC system management port, see LEDs on the XCC system management port.

• For more information about the system error LED, RoT fault LED and system ID LED, see System-I/O-board LEDs.

• For more information about the LEDs on the power supply unit, see Power-supply-unit LEDs.

Inlet and outlet hoses​

The Processor Neptune Core Module spreads two hoses out to connect to the manifolds. The inlet hose conveys warm water from the facility to the cold plates to cool down the processors, and the outlet hose conducts hot water out of the Processor Neptune Core Module to realize system cooling.