Lenovo ThinkServer RD650 - Manual (Page 60)

19 Rear-backplane power connector
Used to connect to the 4-pin power connector on the rear backplane.
20 Front-backplane power connector
Used to connect to the 10-pin power connector on the front backplane.
21 Intrusion switch connector
Used to connect to an intrusion switch.
22 Power-distribution-board connector
Used to connect the power distribution board.
23 25 27 29 31 33 System fan connector
Used to connect a system fan.
24 28 30 34 Memory slots
There are 24 memory slots on the system board. For detailed information, see “Memory module installation
rules” on page 79.
26 Microprocessor 2 socket
32 Microprocessor 1 socket
If the server has two microprocessors, each of the microprocessor is secured in the microprocessor socket
on the system board and a heat sink is installed above the microprocessor to provide cooling. If the server
has only one microprocessor, the microprocessor socket 2 is protected by a microprocessor socket cover.
46 ThinkServer RD650 User Guide and Hardware Maintenance Manual