14 USB 3.1 connectors
Connect a USB device, such as a mouse, keyboard, or other devices, to either of these connectors.
15 XClarity Controller network connector
Use this connector to manage the server, by using a dedicated management network. If you use this
connector, the Lenovo XClarity Controller cannot be accessed directly from the production network. A
dedicated management network provides additional security by physically separating the management
network traffic from the production network. You can use the Setup utility to configure the server to use a
dedicated systems-management network or a shared network.
16 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.
17 OCP 3.0 Ethernet adapter
The OCP 3.0 Ethernet adapter provides two or four extra Ethernet connectors for network connections. One
of the Ethernet connectors on the OCP 3.0 Ethernet adapter can also function as a management connector
with shared management capacity. If the shared management connector fails, traffic can automatically
switch over to another connector on the adapter.
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 7. Port numbering — 2-port OCP module
Figure 8. Port numbering — 4-port OCP 3.0 module
18 / 19 / 20 PCIe riser
Install a PCIe riser card into these slots. See the following table for PCIe slots corresponding to the riser
cards.
Table 6. PCIe riser cards and corresponding PCIe slots
Riser card type x16/x16 (x8 lanes) riser card x16/x16/x16 riser card
20
Slot 5 (x16, x8 lane) Slot 5 (x16)
21
Slot 6 (x16, x8 lane) Slot 6 (x16)
22
NA
Slot 7 (x16)
Chapter 2. Server components 25
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