PB680 RAM Memory Upgrade

Caution Only authorized service personnel should upgrade the system. Anyone who wants to upgrade the system themselves 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
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 PB680 systems based on the CPU type. The following table shows what EDO memory speed is required:
Pentium CPU 70ns 60ns
66MHz X
75MHz X
90MHz X
100MHz X
120MHz X
133MHz X
150MHz X
166MHz X
200MHz 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 Type (Bank 0) SIMM Type (Bank 1) Total System Memory
1M X 32 (4 MB) Empty 8MB
1M X 32 (4 MB) 1M X 32 (4 MB) 16MB
1M X 32 (4 MB) 2M X 32 (8 MB) 24MB
1M X 32 (4 MB) 4M X 32 (16 MB) 40MB
1M X 32 (4 MB) 8M X 32 (32 MB) 72MB
2M X 32 (8 MB) Empty 16MB
2M X 32 (8 MB) 1M X 32 (4 MB) 24MB
2M X 32 (8 MB) 2M X 32 (8 MB) 32MB
2M X 32 (8 MB) 4M X 32 (16 MB) 48MB
2M X 32 (8 MB) 8M X 32 (32 MB) 72MB
4M X 32 (16 MB) Empty 32MB
4M X 32 (16 MB) 1M X 32 (4 MB) 40MB
4M X 32 (16 MB) 2M X 32 (8 MB) 48MB
4M X 32 (16 MB) 4M X 32 (16 MB) 64MB
4M X 32 (16 MB) 8M X 32 (32 MB) 96MB
8M X 32 (32 MB) Empty 64MB
8M X 32 (32 MB) 1M X 32 (4 MB) 72MB
8M X 32 (32 MB) 2M X 32 (8 MB) 80MB
8M X 32 (32 MB) 4M X 32 (16 MB) 96MB
8M X 32 (32 MB) 8M X 32 (32 MB) 128MB