Lenovo M50e Series, A50 manual Installing memory, 62User Guide

The following illustration shows the locations of parts on the system board.

1 Microprocessor	11 SATA0 connector
2 DIMM connector 1	12 Front panel connector
3 DIMM connector 2	13 Clear CMOS/Recovery jumper
4 DIMM connector 3	14 Battery
5 DIMM connector 4	15 Front panel audio connector
6 Power connector	16 PCI slot 3
7 Diskette drive connector	17 PCI slot 2
8 Primary IDE connector	18 PCI slot 1
9 Secondary IDE connector	19 AGP slot (some models)
10SATA1 connector	20 12v power connector

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.

When installing DIMMs, the following rules apply:

vSystem memory is divided into two channels (channel A and B). DIMM connectors 1 and 2 are channel A, and DIMM connectors 3 and 4 are channel B.

vIf DIMM connectors 1 and 3 (or 2 and 4) are filled with the same technology and size of memory, the system operates in dual channel mode.

vUse 2.5 V, 184-pin, double data rate synchronous dynamic random access memory (DDR SDRAM).

vUse 128 MB, 256 MB, 512 MB or 1.0 GB DIMMs in any combination.

vDIMMs are 38.1 mm (1.5 inches) in height.

Note: Only DDR SDRAM DIMMs can be used.

62User Guide