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Memory Upgrade for IBM RS/6000 Model R21
IBM RS/6000 Model R21 memory upgrade specification, RS/6000 Model R21 maximum memory, memory speed, and memory upgrade options.
Upgrade memory on IBM RS/6000 Model R21 upto a maximum of 2 GB
Some systems require either two, four, or eight populated IBM memory cards. The first four memory cards and last four memory cards must be populated with memory kits OF EQUAL CAPACITY. Here are some examples of valid configurations: Two-Cards Memory, with maximum per slot in 8 slots for base memory cards memory slots. The IBM RS/6000 Model R21 takes the Some systems require either two, four, or eight populated IBM memory cards. The first four memory cards and last four memory cards must be populated with memory kits OF EQUAL CAPACITY. Here are some examples of valid configurations: Two-Cards Memory Memory Type.
| IBM RS/6000 Model R21 Memory Upgrade Specification | ||||
|---|---|---|---|---|
| Standard Memory | Maximum Memory | Memory Expansion | CPU Type | Model/Chipset |
| 64 or 128 MB (removable) on base memory card | 2 GB Some systems require either two, four, or eight populated IBM memory cards. The first four memory cards and last four memory cards must be populated with memory kits OF EQUAL CAPACITY. Here are some examples of valid configurations: Two-Cards Memory |
8 slots for base memory cards | 77MHz IBM POWER RISC | IBM's lowest-priced 64-bit RS/6000 enterprise server yet |
IBM RS/6000 Model R21 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 RS/6000 Model R21 has 8 slots for base memory cards 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.
