PB640 RAM Upgrade
| Caution |
Only authorized service personnel should upgrade the system. Anyone who wants to upgrade the system herself/himself should know about the dangers of ESD (Electro-Static Discharge) and the necessary precautions. Unknowingly zapping the components of the computer will void the warranty. |
| |
| Standard on motherboard: |
8MB installed |
| Maximum on motherboard: |
128MB |
| |
| Uses 4/8/16/32 MB 72-pin simms, 60 or 70ns EDO or Fast Paged RAM |
| Supports only non-parity DRAM. |
|
Specifications
EDO Memory varies on PB640 systems based on the CPU type. The Following table shows what EDO memory speed is required:
|
Pentium CPU
|
70ns
|
60ns
|
|
| | |
|
75mhz
|
X
| |
|
90mhz
|
X
| |
|
100mhz
| |
X
|
|
120mhz
|
X
| |
|
150mhz
|
X
| |
|
133mhz
| |
X
|
|
166mhz
| |
X
|
Notes
| 1. |
Bank by bank support for EDO or Fast Page Mode DRAM with automatic presence detect for EDO DRAM. 60ns EDO required for 66 MHz bus speeds, and 70ns EDO required for 50 & 60 MHz bus speed. 70ns Fast Page Mode required for 50, 60, and 66 MHz bus speeds. EDO and Fast Page Mode can be mixed in separate banks. |
| 2. |
Four 32 bit SIMM sockets 4 MB, 8 MB, 16 MB, 32 MB in either single or double sided configurations. Simms must be added in pairs. SIMM sockets can be populated in any order. ONE or more simms may be located under the peripheral bay in the Packard Bell "all-in-one" (Spectria) chassis. |
| 3. |
Bank 0 will be populated as the default from the factory. |
| 4. |
No configuration jumpers: BIOS detects memory size, and memory type (EDO or Fast Page Mode). |
| 5. |
Memory voltage requirements: 5V. |
Upgrade Table
|
Simm bank 0
|
Simm bank 1
|
Total system memory
|
|
Simm type (size)
|
Simm type (size)
| |
| | |
|
Empty
|
1m x 32
|
8mb
|
|
Empty
|
2m x 32
|
16mb
|
|
Empty
|
4m x 32
|
32mb
|
|
Empty
|
8m x 32
|
64mb
|
|
1m x 32
|
Empty
|
8mb
|
|
1m x 32
|
1m x 32
|
16mb
|
|
1m x 32
|
2m x 32
|
24mb
|
|
1m x 32
|
4m x 32
|
40mb
|
|
1m x 32
|
8m x 32
|
72mb
|
|
2m x 32
|
Empty
|
16mb
|
|
2m x 32
|
1m x 32
|
24mb
|
|
2m x 32
|
2m x 32
|
32mb
|
|
2m x 32
|
4m x 32
|
48mb
|
|
2m x 32
|
8m x 32
|
80mb
|
|
4m x 32
|
Empty
|
32mb
|
|
4m x 32
|
1m x 32
|
40mb
|
|
4m x 32
|
2m x 32
|
48mb
|
|
4m x 32
|
4m x 32
|
64mb
|
|
4m x 32
|
8m x 32
|
96mb
|
|
8m x 32
|
Empty
|
64mb
|
|
8m x 32
|
1m x 32
|
72mb
|
|
8m x 32
|
2m x 32
|
80mb
|
|
8m x 32
|
4m x 32
|
96mb
|
|
8m x 32
|
8m x 32
|
128mb
|
