Rear view

The rear view of the server varies by model. Depending on the model, your server might look slightly different from the illustrations in this topic.

Refer to the following rear view for different server models:

• Server model with three PCIe slots

• Server model with two PCIe slots

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 with 3 low profile PCIe adapters

Table 1. Components on the rear of the server

Callout	Callout
1 PCIe slot 1 on riser 1 assembly	2 PCIe slot 2 on riser 1 assembly
3 PCIe slot 3 on riser 2 assembly	4 Power supply 2 (optional)
5 Power supply 1	6 NMI button
7 USB 3.1 Gen 1 (5Gbps) connectors (3 DCIs)	8 VGA connector
9 XClarity Controller network connector	10 Ethernet connectors on OCP module (optional)

Note

For more information about each component, see Rear components overview.

Server model with two PCIe slots

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 1 low profile PCIe adapter, 1 full height PCIe adapter, and 1 filler

Table 2. Components on the rear of the server

Callout	Callout
1 PCIe slot 1 on riser 1 assembly	2 PCIe slot 2 on riser 1 assembly
3 Power supply 2 (optional)	4 Power supply 1
5 NMI button	6 VGA connector
7 USB 3.1 Gen 1 (5Gbps) connectors (3 DCIs)	8 XClarity Controller network connector
9 Ethernet connectors on OCP module (optional, two or four connectors may be available)

Figure 3. Rear view with 2 low profile PCIe adapters

Table 3. Components on the rear of the server

Callout	Callout
1 PCIe slot 1 on riser 1 assembly	2 PCIe slot 3 on riser 2 assembly
3 Power supply 2 (optional)	4 Power supply 1
5 NMI button	6 VGA connector
7 USB 3.1 Gen 1 (5Gbps) connectors (3 DCIs)	8 XClarity Controller network connector
9 Ethernet connectors on OCP module (optional, two or four connectors may be available)

Figure 4. Rear view with 1 low profile PCIe adapter, 1 filler, and 1 full height PCIe adapter

Table 4. Components on the rear of the server

Callout	Callout
1 PCIe slot 1 on riser 1 assembly	2 PCIe slot 3 on riser 2 assembly
3 Power supply 2 (optional)	4 Power supply 1
5 NMI button	6 VGA connector
7 USB 3.1 Gen 1 (5Gbps) connectors (3 DCIs)	8 XClarity Controller network connector
9 Ethernet connectors on OCP module (optional, two or four connectors may be available)

Note

For more information about each component, see Rear components overview.

Rear components overview

Ethernet connectors

Figure 5. OCP module (two connectors, seen from the rear)

Figure 6. OCP module (four connectors, seen from the rear)

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

By default, any of the connectors on the OCP module can function as a shared management connector.

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.

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.

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 Power supply LEDs.

USB 3.1 Gen 1 (5Gbps) connectors

The USB 3.1 Gen 1 (5Gbps) connectors are direct connect interfaces (DCIs) for debugging, which can be used to attach a USB-compatible device, such as a USB keyboard, USB mouse, or USB storage device.

VGA connector

The VGA connectors on the front and 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.

XClarity Controller network connector

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