Chapter 2. Architecture And Technical Overview - IBM OpenPower 720 Technical Overview And Introduction

Architecture and technical
Chapter 2.
overview
This chapter discusses the overall system architecture represented by Figure 2-1. The major
components of this diagram are described in the following sections. The bandwidths provided
throughout this section are theoretical maximums provided for reference. It is always
recommended to obtain real-world performance measurements using production workloads.
Two HMC
Eth ports
RIO-2 bus
2 B (Diff'l) each dir
RIO-2 bus
2 B (Diff'l) each dir
1 GB/sec
GX+ bus
3 (Proc Clk):1
4 Bytes each dir
Elastic Intfc
Figure 2-1 OpenPower 720 logic data flow
© Copyright IBM Corp. 2004. All rights reserved.
Two SP communication
Two SPCN
ports ports
CUoD key card
interface card
1 GB/sec
RIO-2 expansion
card
Enterprise
RIO HUB
2 (Proc Clk):1
8 Bytes each dir
Elastic Intfc
DCM
core core
L3
shared L2 cache
cache
POWER5
memory
controller
distributed switch
SMI-II SMI-II
*DDR1 memory
D D D D D D D D
I I I I I I I I
M M M M M M M M
M M M M M M M M
Two USB
ports
PCI-X slot #5 #4 #3 #2 #1
operator panel
from optional
media backplane
GX+ slot
USB
133 MHz
100 MHz
SP
33 MHz
RIO-2 bus
Enterprise
2 B (Diff'l) each dir
RIO HUB
1 GB/sec
GX+ bus
3 (Proc Clk):1
4 Bytes each dir
Elastic Intfc Tape
DCM
Vertical Fabric
core core
bus
L3
shared L2 cache
cache
POWER5
memory
controller
distributed switch
SMI-II SMI-II
*DDR1 memory
D D D D D D D D
I I I I I I I I
4-pack disk drive backplane
M M M M M M M M
M M M M M M M M
2 (Proc Clk):1
8 Bytes each dir
Elastic Intfc
2
Two
Ethernet
ports
133 MHz
Dual 1 GB
Ethernet
133 MHz
133 MHz
133 MHz
66 MHz
PCI-X to PCI-X PCI-X to PCI-X
bridge 2 133 MHz bridge 0
IDE
PCI-X Host
controller
bridge
bus0
RAID
enablement
to operator panel
card
slim-line media device
slim-line media device
optional media backplane
4-pack disk drive backplane
Dual SCSI
Ultra320
1
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