Operating instructions

See Figure 1–5 for sections of the motherboard:
CPU slots (CPU 0 is right slot).
I/O slots
Memory slots
IDE
SCSI
All components are on a single system motherboard that contains a memory
subsystem, PCI bus, integrated dual Ultra3 SCSI controllers, and slots for PCI
options.
CPU Module
The system can have up to two CPU modules. The CPU modules are installed
on the system motherboard. Each module contains an Alpha EV68 microproc-
essor.
The microprocessor is a superscalar CPU with out-of-order execution and specu-
lative execution to maximize speed and performance. It contains four integer
execution units and dedicated execution units for floating-point add, multiply,
and divide. It has an instruction cache and a data cache on the chip. Each
cache is a 64 KB, two-way, set-associative, virtually addressed cache that has
64-byte blocks. The data cache is a physically tagged, write-back cache.
Each CPU module has an 8 MB Level 2 B-cache (backup cache) and a power
regulator. See Chapter 4 for instructions on installing CPUs.
DIMMs
The system supports up to 16 DIMMs. Each array contains four slots. The sys-
tem uses 200-pin buffered synchronous dual in-line memory modules (DIMMs).
(See Chapter 4 for instructions on installing DIMMs.)
System Overview 1-11