Technical Reference Guide HP Compaq dx7300 and dc7700 Series Business Desktop Computers Document Part Number: 433473-001 September 2006 This document provides information on the design, architecture, function, and capabilities of the HP Compaq dx7300 and dc7700 Series Business Desktop Computers. This information may be used by engineers, technicians, administrators, or anyone needing detailed information on the products covered. © Copyright 2006 Hewlett-Packard Development Company, L.P. The information contained herein is subject to change without notice. Microsoft, MS-DOS, Windows, and Windows NT are trademarks of Microsoft Corporation in the U.S. and other countries. Intel, Pentium, Intel Inside, and Celeron are trademarks of Intel Corporation in the U.S. and other countries. Adobe, Acrobat, and Acrobat Reader are trademarks or registered trademarks of Adobe Systems Incorporated. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein. This document contains proprietary information that is protected by copyright. No part of this document may be photocopied, reproduced, or translated to another language without the prior written consent of Hewlett-Packard Company. WARNING: Text set off in this manner indicates that failure to follow directions could result in bodily ! harm or loss of life. CAUTION: Text set off in this manner indicates that failure to follow directions could result in damage to equipment or loss of information. ✎ Text set off in this manner provides infomation that may be helpful. Technical Reference Guide HP Compaq dx7300 and dc7700 Series Business Desktop Computers First Edition (September 2006) Document Part Number: 433473-001 Contents 1Introduction 1.1 About this Guide . 1–1 1.1.1 Online Viewing . 1–1 1.1.2 Hardcopy . 1–1 1.2 Additional Information Sources . 1–1 1.3 Model Numbering Convention . 1–2 1.4 Serial Number . 1–3 1.5 Notational Conventions . 1–3 1.5.1 Values. 1–3 1.5.2 Ranges . 1–3 1.5.3 Register Notation and Usage . 1–3 1.5.4 Bit Notation and Byte Values. 1–3 1.6 Common Acronyms and Abbreviations . 1–4 2 System Overview 2.1 Introduction . 2–1 2.2 Features . 2–2 2.3 Mechanical Design . 2–4 2.3.1 Cabinet Layouts . 2–5 2.3.2 Chassis Layouts . 2–10 2.3.3 Board Layouts . 2–14 2.4 System Architecture . 2–17 2.4.1 Intel Processor Support . 2–19 2.4.2 Chipset . 2–20 2.4.3 Support Components . 2–21 2.4.4 System Memory . 2–21 2.4.5 Mass Storage . 2–22 2.4.6 Serial and Parallel Interfaces . 2–22 2.4.7 Universal Serial Bus Interface . 2–22 2.4.8 Network Interface Controller . 2–22 2.4.9 Graphics Subsystem . 2–23 2.4.10Audio Subsystem. 2–23 2.5 Specifications. 2–24 Technical Reference Guide www.hp.com 5 Contents 3 Processor/Memory Subsystem 3.1 Introduction . 3–1 3.2 Pentium 4 Processor . 3–2 3.2.1 Processor Overview . 3–2 3.2.2 Processor Upgrading . 3–3 3.3 Memory Subsystem . 3–4 4 System Support 4.1 Introduction . 4–1 4.2 PCI Bus Overview. 4–1 4.2.1 PCI 2.3 Bus Operation . 4–2 4.2.2 PCI Express Bus Operation . 4–6 4.2.3 Option ROM Mapping . 4–8 4.2.4 PCI Interrupts . 4–8 4.2.5 PCI Power Management Support. 4–8 4.2.6 PCI Connectors. 4–9 4.3 System Resources . 4–11 4.3.1 Interrupts . 4–11 4.3.2 Direct Memory Access. 4–16 4.4 Real-Time Clock and Configuration Memory. 4–19 4.4.1 Clearing CMOS . 4–19 4.4.2 Standard CMOS Locations. 4–20 4.5 System Management . 4–20 4.5.1 Security Functions . 4–20 4.5.2 Power Management . 4–22 4.5.3 System Status . 4–23 4.5.4 Thermal Sensing and Cooling . 4–23 4.6 Register Map and Miscellaneous Functions . 4–24 4.6.1 System I/O Map . ..