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Memory Upgrade for IBM ThinkStation D20 (4155) (ECC)
IBM ThinkStation D20 (4155) (ECC) memory upgrade specification, ThinkStation D20 (4155) (ECC) maximum memory, memory speed, and memory upgrade options.
Upgrade memory on IBM ThinkStation D20 (4155) (ECC) upto a maximum of 48GB with 2 CPUs
PC3-10666 DDR3-1333 240pin ECC SDRAM DIMM, with maximum per slot in 12 Sockets (6 Sockets (2 banks of 3) per CPU memory slots. The IBM ThinkStation D20 (4155) (ECC) takes the PC3-10666 DDR3-1333 240pin ECC SDRAM DIMM Memory Type.
| IBM ThinkStation D20 (4155) (ECC) Memory Upgrade Specification | ||||
|---|---|---|---|---|
| Standard Memory | Maximum Memory | Memory Expansion | CPU Type | Model/Chipset |
| 1GB | 48GB with 2 CPUs PC3-10666 DDR3-1333 240pin ECC SDRAM DIMM |
12 Sockets (6 Sockets (2 banks of 3) per CPU | Intel Xeon Processor Intel 5500 Chipset |
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IBM ThinkStation D20 (4155) (ECC) 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 ThinkStation D20 (4155) (ECC) has 12 Sockets (6 Sockets (2 banks of 3) per CPU 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.
