In this mode, connection to the USB port is shared by the server and Lenovo XClarity Controller, while the 
port is switched to the server.
11  USB 3.1 Gen 1 (5 Gbps) connector
The USB 3.1 Gen 1 (5 Gbps) connector can be used to attach a USB-compatible device, such as a USB 
keyboard, USB mouse, or USB storage device.
12  Pull-out information tab
This tab contains network information such as MAC address and XCC network access label.
13  Rack release latches
Press on the latch on both sides to disengage the server from the rack and slide it out.
Rear view
The rear of the server provides access to several components, including the power supplies, PCIe risers, and 
Ethernet port.
The ThinkSystem SR850 V3 rear view varies by model. Refer to the rear view specific to each model to 
identify the components. 
• 
“Rear view of the sever model with three PCIe risers” on page 20
•  “Rear view of the sever model with four PCIe risers” on page 23
Rear view of the sever model with three PCIe risers
This section contains information on the rear view of the sever model with three PCIe risers.
Figure 3. Rear view of the sever model with three PCIe risers
Table 3.  Components on the rear view of the sever model with three PCIe risers
1  PCIe riser 1 (PCIe slot 3-5)
6  XCC system management port (1 GB RJ-45)
2  PCIe riser 2 (PCIe slot 6-8)
7  USB 3.1 Gen 1 (5 Gbps) connectors (total of three 
connectors)
3  PCIe riser 3 (PCIe slot 9-11)
8  VGA connector
4  Power supply units
9  NMI button
5  OCP slot 1 (PCIe slot 1) 10  OCP slot 2 (PCIe slot 2)
20 ThinkSystem SR850 V3 System Configuration Guide