Lenovo 81413NU User Manual - Page 28
Installing, memory
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The following illustration shows the locations of parts on the system board. 1 12v power connector 2 Diskette drive connector 3 Speaker connector 4 Memory connector 4 5 Memory connector 3 6 Memory connector 2 7 Memory connector 1 8 Clear CMOS/Recovery jumper 9 Front panel connector 10 PATA IDE connector 11 SATA 4 connector 12 SATA 3 connector 13 SATA 2 connector 14 SATA 1 connector 15 Cover presence switch connector 16 Power supply connector 17 PCI Express (x16) graphics adapter connector 18 PCI Express (x1) adapter connector 19 PCI adapter connector 2 20 PCI adapter connector 1 21 Battery 22 Microprocessor 23 Microprocessor fan connector 24 Microprocessor heat sink Installing memory Your computer has four connectors for installing dual inline memory modules (DIMMs) that provide up to a maximum of 4.0 GB of system memory. Note: Addressable memory might be less than total supported memory. System memory is divided into two channels (channel A and B). Memory connectors 1 and 2 are channel A, and memory connectors 3 and 4 are channel B. If memory modules are present in both channels, your computer operates in dual channel mode. Your computer has either double data rate (DDR) or double data rate 2 (DDR2) memory. The type of memory required depends on the system board that is installed in your computer. 12 User Guide