Compaq AlphaServer DS20 User Manual Page 1

Compaq AlphaServer DS20E Systems Technical Summary

8System Features Auto reboot. On systems running Tru64 UNIX or OpenVMS, a firmware environment variable lets you set the default action the system ta

9The primary means of clustering AlphaServer DS20E systems depends on the operating system. • Ethernet, OpenVMS • CI clusters, OpenVMS only • Mem

10Compaq AlphaServer DS20E System Diagrams 956741213MR0300A8 MR0301A123456987 1. CPUs 2. System board 3. PCI slots 4. System features module 5.

11System Features at a Glance Table 1 provides a quick reference to features of Compaq AlphaServer DS20E systems. Table 1 AlphaServer DS20E Feature

12Physical Characteristics Table 2 details basic physical characteristics of the system. Table 2 AlphaServer DS20E Physical Characteristics Dimensi

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Contents System Overview 1 Features and Benefits 1 Architecture 2 System Block Diagram System Board 3 Component and Connector Locations

1 Compaq AlphaServer DS20E Systems The Compaq AlphaServer DS20E system delivers high performance for business, technical, and scientific applicat

2Architecture This system is designed to maximize the potential of the Alpha 21264 chip. The traditional bus interconnect has been replaced by a sw

3System Board The interconnect switch is implemented on the system board by the chipset consisting of one C-chip, two P-chips, and eight D-chips. Thi

4Third-Generation Alpha Chip The third generation of the Alpha microprocessor, the Alpha 21264, is a superscalar superpipelined implementation of the

5Memory The switch interconnect can move a large amount of data over two independent memory data buses. Each memory bus is 256 bits wide (32 bytes).

6I/O Implementation Two separate 64-bit PCI buses are provided, each with three slots. As can be seen in the block diagram, the C-chip controls both

7Server Management The AlphaServer products support important operational and platform management requirements. Operational Management Server/Network