2 Sun Fire V890 Server Owner’s Guide • September 2004
Processing Capability
Processing power is provided by up to four CPU/Memory boards. Each board
incorporates:
■ Two dual-threaded UltraSPARC IV processors
■ 16 Mbytes of local static random access memory (SRAM) external cache memory
per processor
■ Slots for 16 memory modules (eight per processor)
A fully configured system includes a total of eight UltraSPARC IV processors
residing on four CPU/Memory boards. For more information, see “About
CPU/Memory Boards” on page 48.
System Memory
System main memory is provided by up to 64 dual inline memory modules
(DIMMs), which operate at a 75-MHz clock frequency. The system comes standard
with 512-Mbyte DIMMs, with 1-Gbyte DIMMs optionally available. Total system
memory is shared by all processors in the system and ranges from a minimum of 16
Gbytes (with a four-processor system) to a maximum of 64 Gbytes (with an eight-
processor system). For more information about system memory, see “About Memory
Modules” on page 51.
System I/O
System I/O is handled by four separate Peripheral Component Interconnect (PCI)
buses. These industry-standard buses support all of the system’s on-board I/O
controllers in addition to nine slots for PCI interface cards. Seven of the PCI slots
operate at a 33-MHz clock rate, and two slots operate at either 33 or 66 MHz. All
slots comply with PCI Local Bus Specification Revision 2.1 and support PCI hot-plug
operations. You can hot-plug any standard PCI card, provided a suitable software
driver exists for the Solaris™ Operating System (Solaris OS) and the driver supports
PCI hot-plug operations. For additional details, see “About PCI Cards and Buses” on
page 56.