Upgrade IBM RS/6000 Model R21 Computer Memory

 Memory Specifications
Standard64 or 128 MB (removable) on base memory card
Maximum2 GB
Slots8 slots for base memory cards
CommentsSome 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
CPU Type77MHz IBM POWER RISC
Model CommentsIBM's lowest-priced 64-bit RS/6000 enterprise server yet

Your IBM RS/6000 Model R21 can support up to 2 GB of memory. For optimal system performance install the maximum amount of memory in each memory socket, this system comes with standard amount of   64 or 128 MB (removable) on base memory card RAM. One or more of the sockets in the system might be already filled with memory. Whenever you upgrade, you can either add memory to one of the open sockets and/or remove memory from a filled socket and replace it with a higher capacity memory module. Select your Memory Upgrade for IBM RS/6000 Model R21.