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Memory Upgrade for Toshiba Satellite M55-S139
Toshiba Satellite M55-S139 memory upgrade specification, Satellite M55-S139 maximum memory, memory speed, and memory upgrade options.
Upgrade memory on Toshiba Satellite M55-S139 upto a maximum of 2.0 GB
PC2-4200 DDR2 SDRAM SODIMMs, with maximum 1GB per slot in 2 memory slots. The Toshiba Satellite M55-S139 takes the PC2-4200 DDR2 SDRAM SODIMMs Memory Type.
| Toshiba Satellite M55-S139 Memory Upgrade Specification | ||||
|---|---|---|---|---|
| Standard Memory | Maximum Memory | Memory Expansion | CPU Type | Model/Chipset |
| 512 MB (removable) | 2.0 GB PC2-4200 DDR2 SDRAM SODIMMs |
2 sockets | 1.6GHz Intel Celeron M 380 | 400MHz FSB, ATI RADEON XPRESS 200M Chipset |
Toshiba Satellite M55-S139 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 Toshiba Satellite M55-S139 has 2 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.
