Front cover IBM Power Systems H922 and H924 Technical Overview and Introduction Tamas David Domjan Bartlomiej Grabowski Mauro Minomizaki Redpaper IBM Redbooks IBM Power Systems H922 and H924 Technical Overview and Introduction January 2021 REDP-5622-00 Note: Before using this information and the product it supports, read the information in “Notices” on page vii. First Edition (January 2021) This edition applies to IBM Power System H922 (9223-22S), and IBM Power System H924 (9223-42S) servers. This document was created or updated on January 8, 2021. © Copyright International Business Machines Corporation 2021. All rights reserved. Note to U.S. Government Users Restricted Rights -- Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp. Contents Notices . vii Trademarks . viii Preface . ix Authors. .x Now you can become a published author, too! . .x Comments welcome. xi Stay connected to IBM Redbooks . xi Chapter 1. General description . 1 1.1 Systems overview . 2 1.1.1 Power H922 server (9223-22S) . 3 1.1.2 Power H924 server (9223-42S) . 4 1.1.3 Common features . 5 1.2 Operating environment . 6 1.3 Physical package . 7 1.4 System features . 9 1.4.1 Power H922 (9223-22S) system features. 9 1.4.2 Power H924 (9223-42S) system features. 10 1.4.3 Minimum features . 11 1.4.4 Power supply features . 12 1.4.5 Processor module features . 12 1.4.6 Memory features . 14 1.4.7 PCIe slots . 15 1.5 Disk and media features . 16 1.6 I/O drawers for Power H922, and Power H924 servers . 26 1.6.1 PCIe Gen3 I/O expansion drawer . 26 1.6.2 .I/O drawers and usable PCI slots. 27 1.6.3 EXP24SX SAS Storage Enclosure (#ESLS) and EXP12SX SAS Storage Enclosure (#ESLL). 28 1.7 System racks. 30 1.7.1 IBM 7014 Model T00 rack. 30 1.7.2 IBM 7014 Model T42 rack. 31 1.7.3 IBM 42U Slim Rack 7965-94Y . 33 1.7.4 1.8 Meter Rack (#0551) . 33 1.7.5 2.0 Meter Rack (#0553) . 33 1.7.6 Rack (#ER05) . 33 1.7.7 The AC power distribution unit and rack content . 34 1.7.8 Rack-mounting rules . 37 1.7.9 Useful rack additions. 37 1.7.10 Original equipment manufacturer racks . 39 1.8 Hardware Management Console . 40 1.8.1 New features. 40 1.8.2 Hardware Management Console overview . 41 1.8.3 Hardware Management Console code level . 42 1.8.4 Two architectures of Hardware Management Console. 43 1.8.5 Virtual Hardware Management Console . 43 1.8.6 Connectivity to POWER9 processor-based systems . 45 1.8.7 High availability Hardware Management Console configuration. 46 © Copyright IBM Corp. 2021. iii Chapter 2. Architecture and technical overview . 49 2.1 IBM POWER9 processor . 53 2.1.1 POWER9 processor overview. 53 2.1.2 POWER9 processor features . 54 2.1.3 POWER9 processor core . 55 2.1.4 Simultaneous multithreading. 56 2.1.5 Processor feature codes . 56 2.1.6 Memory access. 57 2.1.7 On-chip L3 cache innovation and intelligent caching . 58 2.1.8 Hardware transactional memory . 59 2.1.9 Coherent Accelerator Processor Interface 2.0 . 59 2.1.10 Power management and system performance . 61 2.2 Memory subsystem . 63 2.2.1 Memory placement rules. 64 2.2.2 Memory bandwidth . 69 2.3 System buses . 72 2.3.1 Memory buses . 72 2.3.2 Inter-node SMP X-buses. 73 2.3.3 PCIe Gen 4 buses. 73 2.3.4 Service processor interface bus . 75 2.4 Internal I/O subsystem . 75 2.4.1 Slot configuration . 75 2.4.2 System ports . 78 2.5 PCIe adapters . 78 2.5.1 Peripheral Component Interconnect Express . 78 2.5.2 LAN adapters . ..