Lenovo ThinkSystem SR645 Maintenance Manual page 48

Server model with two 7mm hot-swap rear drive bays and two PCIe slots
The following illustration shows the rear view of the server model with two 7mm hot-swap rear drive bays and
two PCIe slots. Depending on the model, your server might look slightly different from the illustration below.
Table 15. Components on the rear of the server
PCIe slot 1 on riser 1 assembly
1
Rear 7mm drive bays (2)
3
Power supply 1
5
USB 3.1 Gen 1 connectors (3)
7
XClarity Controller network connector
9
Note: For more information about each component, see Rear components overview.
ThinkSystem SR645 Maintenance Manual
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PCIe slot 2 on riser 1 assembly
2
Power supply 2 (optional)
4
NMI button
6
VGA connector
8
Ethernet connectors on OCP 3.0 Ethernet adapter
10
(optional, two or four connectors may be available)