Installing Memory - IBM A50 User Manual

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

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:
v System memory is divided into two channels (channel A and B). DIMM
v If DIMM connectors 1 and 3 (or 2 and 4) are filled with the same technology and
v Use 2.5 V, 184-pin, double data rate synchronous dynamic random access
v Use 128 MB, 256 MB, 512 MB or 1.0 GB DIMMs in any combination.
v DIMMs are 38.1 mm (1.5 inches) in height.
Note: Only DDR SDRAM DIMMs can be used.
1 Microprocessor
2 DIMM connector 1
3 DIMM connector 2
4 DIMM connector 3
5 DIMM connector 4
6 Power connector
7 Diskette drive connector
8 Primary IDE connector
9 Secondary IDE connector
10 SATA1 connector
connectors 1 and 2 are channel A, and DIMM connectors 3 and 4 are channel B.
size of memory, the system operates in dual channel mode.
memory (DDR SDRAM).
11 SATA0 connector
12 Front panel connector
13 Clear CMOS/Recovery jumper
14 Battery
15 Front panel audio connector
16 PCI slot 3
17 PCI slot 2
18 PCI slot 1
19 AGP slot (some models)
20 12v power connector
Chapter 1. Types 8149, 8177, and 8178
11