> IBM Memory > IBM Other Models Computer Memory
Memory Upgrade for IBM PS/1 Consultant 2155-G78/G54
IBM PS/1 Consultant 2155-G78/G54 memory upgrade specification, PS/1 Consultant 2155-G78/G54 maximum memory, memory speed, and memory upgrade options.
Upgrade memory on IBM PS/1 Consultant 2155-G78/G54 upto a maximum of 32 MB
80ns 30-pin SIMMs, with maximum per slot in 8 (2 banks of 4) memory slots. The IBM PS/1 Consultant 2155-G78/G54 takes the 80ns 30-pin SIMMs Memory Type.
| IBM PS/1 Consultant 2155-G78/G54 Memory Upgrade Specification | ||||
|---|---|---|---|---|
| Standard Memory | Maximum Memory | Memory Expansion | CPU Type | Model/Chipset |
| 4 MB or 8 MB (removable) | 32 MB 80ns 30-pin SIMMs |
8 sockets (2 banks of 4) | 33MHz/25MHz Intel i486DX/SX | 100MHz FSB |
IBM PS/1 Consultant 2155-G78/G54 Memory Upgrade options.
What are memory sockets or slots and how are these divided into bank?
Memory Sockets or Slots are the place where memory RAM modules are inserted in the motherboard. The IBM PS/1 Consultant 2155-G78/G54 has 8 (2 banks of 4) memory expansion slots. A memory bank is a group of memory expansion sockets, a bank must be completely filled with memory modules of the same size and type in order for the system to recognize and address the memory. i.e. :
2 sockets (2 banks of 1) This indicates that there are 2 memory slots. These are divided into 2 banks, and each bank consists of one memory slot. So you can add memory one piece at a time for the system to use.
3 sockets (3 banks of 1) This indicates that there are 3 memory slots. These are divided into 3 banks, and each bank consists of one memory slot. So you can add memory one piece at a time for the system to use.
4 sockets (2 banks of 2) This indicates that there are 4 memory slots. These are divided into 2 banks, and each bank consists of two memory slots. So you must add memory two pieces at a time (they must be the same size and type of memory) in order for the system to benefit from the upgrade.
8 sockets (4 banks of 2) This indicates that there are 8 memory slots. These are divided into 4 banks, and each bank consists of two memory slots. So you must add memory two pieces at a time (they must be the same size and type of memory) in order for the system to benefit from the upgrade.
12 sockets (3 banks of 4) This indicates that there are 12 memory slots. These are divided into 3 banks, and each bank consists of four memory slots. So you must add memory four pieces at a time (and they must be the same size and type of memory) in order for the system to benefit from the upgrade.
