About Memory Modules - Sun Microsystems Sun Fire V490 Parts Installation And Removal Manual

About Memory Modules

The Sun Fire V490 server uses 3.3V, high-capacity dual inline memory modules
(DIMMs). The DIMMs are built with synchronous dynamic random access memory
(SDRAM) chips that operate at a 75-MHz clock frequency.
Each CPU/Memory board contains slots for 16 DIMMs. Within each CPU/Memory
board, the 16 DIMM slots are organized into groups of four. The system reads from,
or writes to, all four DIMMs in a group simultaneously. DIMMs, therefore, must be
added in sets of four.
84 Sun Fire V490 Server Parts Installation and Removal Guide • October 2005