Lenovo ThinkServer RD340 (English) User Guide - Page 54

26 31 Memory slots There are 12 memory slots on the system board. For more information, see "Memory module installation rules" on page 81. 24 Microprocessor socket 2 29 Microprocessor socket 1 If the server has two microprocessors, each of the microprocessor is secured in the microprocessor socket on the system board. 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. System board jumpers and switches This topic provides information about the jumpers and switches on the system board. A jumper is a short length of conductor used to set up or adjust printed circuit boards, such as the system board of a computer. A jumper usually is encased in a non-conductive block of plastic for convenient use and to avoid any possible damage to a live circuit. Jumper pins arranged in groups on the system board are called jumper blocks. When two or more jumper pins are capped with a jumper, an electrical connection is made between them and the equipment is thus instructed to activate certain settings accordingly. The following illustration shows a jumper in the default setting position (pin 1 and pin 2). This is the correct position for normal operation. Figure 30. Default jumper setting 42 ThinkServer RD340 User Guide and Hardware Maintenance Manual