Rear view
The rear of the server provides access to several connectors and components.
Refer to the following rear views for different server models:
• “Rear view with six PCIe slots” on page 18
Rear view with six PCIe slots
Table 6. Components on the rear of the server
Callout Callout
1 “PCIe slots” on page 18
2 “Power supply units” on page 18
3 “NMI button” on page 19
4 “USB 3 (5 Gbps) connectors (3)” on page 19
5 “VGA connector” on page 19 6 “XCC system management port” on page 19
7 “Ethernet connectors on OCP module (optional)” on
page 19
Rear components overview
PCIe slots
The PCIe slots are on the rear of the server and your server supports up to six PCIe slots on riser 1 and 2
assemblies. For more information, see
“PCIe slots and PCIe adapters” on page 40.
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.
Power supply units
The hot-swap redundant power supply units help you avoid significant interruption to the operation of the
system when a power supply unit fails. You can purchase a power supply option from Lenovo and install the
power supply unit to provide power redundancy without turning off the server.
On each power supply unit, there are three status LEDs near the power cord connector. For information
about the LEDs, see
“Power supply LEDs” on page 207.
18
ThinkSystem SR655 V3 User Guide
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