IBM 2254, Hardware Maintenance Manual

Page: 57 / 252

See the following illustration for the location of parts on the system board.
1
Fan connector
11
Primary IDE connector
2
Microprocessor
12
Front USB connector
3
DIMM 1
13
Virtual clear CMOS/BIOS recovery jumper
4
DIMM 2
14
Battery
5
Power connector
15
PCI slot
6
Power connector
16
PCI slot
7
Hard disk LED connector
17
PCI slot
8
Power LED connector
18
CD-ROM audio connector
9
Diskette connector
19
Front panel connector
10
Secondary IDE connector
Installing memory - microtower model
Your computer has two connectors for installing dual in-line memory modules
(DIMMs) that provide up to a maximum of 512 MB of system memory.
Installing DIMMs
When installing DIMMs, the following rules apply:
v
Fill each system memory connector sequentially, starting at DIMM 1
v
Use 3.3 V, synchronous, 168-pin, unbuffered, 133 MHz nonparity synchronous
dynamic random access memory (SDRAM)
v
Use 32 MB, 64 MB, 128 MB, or 256 MB DIMMs in any combination
v
DIMM heights of 38.1 mm (1.5 inches)
To install a DIMM:
1. Remove the cover. See “Removing the cover - microtower model” on page 44.
Chapter 4. Installing Options
49