Compaq DS20E - AlphaStation - 1 GB RAM Průvodce řešením problémů stáhnout pdf (Strana 31)

System Overview 1-15

Compaq Confidential – Need to Know Required

Writer: Robert Young Project: DS20E Reference Guide Comments:

Part Number: ER-K8F6W-UA .A01 File Name: b-ch1 System Overview.doc Last Saved On: 10/4/99 1:23 PM

Processor Modules

The system supports up to two processor modules that can be installed on the

system board. Each processor module contains a 21264 microprocessor. The

21264 microprocessor is a superscalar chip with out-of-order execution and

speculative execution to maximize speed and performance. It contains four

integer execution units and dedicated execution units for floating-point add,

multiply, and divide. The chip also has an integrated instruction cache and a

data cache. Each cache consists of a 64 KB two-way set associative, virtually

addressed cache divided into 64-byte blocks. The data cache is a physically

tagged, write-back cache.

Each processor module contains 4 MB secondary B-cache consisting of late-

write synchronous SDRAMs (synchronous dynamic random access memory)

that provide low latency and high bandwidth. Refer to Chapter 8, “Installing

Components,” for instructions on installing additional processors.

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Compaq DS20E - AlphaStation - 1 GB RAM Průvodce řešením problémů Strana 31