50 Sun Fire V890 Server Owner’s Guide • May 2004
The UltraSPARC IV processor is a high-performance, highly integrated, CMP
processor that enables an increase in application throughput while maintaining
binary compatibility. The UltraSPARC IV processor implements a 64-bit SPARC
International Version 9 Instruction Set Architecture (ISA).
The UltraSPARC IV processor improves throughput performance in commercial
applications such as databases, web servers, and high-performance technical
computing. It supports both 2D and 3D graphics, as well as image processing, video
compression and decompression, and video effects through the sophisticated Visual
Instruction Set (VIS) extension. VIS provides high levels of multimedia performance,
including real-time video compression and decompression and two streams of
MPEG-2 decompression at full broadcast quality with no additional hardware
support.
The Sun Fire V890 server employs a shared-memory multiprocessor architecture
with all processors sharing the same physical address space. The UltraSPARC IV
processors, main memory, and I/O subsystem communicate via a high-speed system
interconnect bus, operating at a clock rate of 150 MHz. In a system configured with
multiple CPU/Memory boards, all main memory is accessible from any processor
over the system bus. The main memory is shared logically by all processors and I/O
devices in the system.
For information about memory modules and memory configuration guidelines, see
“About Memory Modules” on page 51.
Caution – CPU/Memory boards must be installed only by a qualified service
technician. After installing a CPU/Memory board, you must perform a
reconfiguration boot in order for the environmental software to recognize the new
device. See “How to Initiate a Reconfiguration Boot” on page 40.
Caution – Either a CPU/Memory board or an air baffle must be installed in each
CPU/Memory slot at all times. After removing a CPU/Memory board, a
qualified service technician must install a replacement board or an air baffle
immediately to avoid an automatic thermal shutdown. For installation
instructions, see the Sun Fire V890 Server Service Manual, which is included on the
Sun Fire V890 Documentation CD.
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