IBM eServer OpenPower 720, Technical Overview And Introduction

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OpenPower 720 Technical Overview and Introduction
Figure 2-7 IBM memory certification label
Sometimes OEM vendors put a label reporting the IBM memory part number but not the
barcode or the alphanumeric string, or both on their DIMMs.
In case of system failure caused by OEM memory installed in the system, the first thing to do
is to replace the suspected memory with IBM memory and check whether the problem is
corrected. Contact your IBM representative for further assistance if needed.
2.4 System buses
The following sections provide additional information related to the internal buses.
2.4.1 RIO buses and GX card
Each DCM provides a GX+ bus that is used to connect to an I/O subsystem. In a fully
populated OpenPower 720, there are two GX+ buses, one from each processor card. Each
system has one GX+ slot with a single GX+ bus. The GX+ slot is not active unless the second
processor card is installed. The GX+ cards are hot-pluggable. The OpenPower 720 provides
two external RIO-2 ports that can operate up to 1 GHz. An add-in GX adapter card (Remote
I/O expansion card, FC 1806) when plugged into the GX+ slot adds two more RIO-2 ports.
The RIO-2 ports are used for I/O expansion to external I/O drawers. The supported I/O
drawer is 7311 Model D20.
2.5 Internal I/O subsystem
The internal I/O subsystem resides on the system planar, and the service processor (SP) is
packaged on a separate service processor card. Each card is a separate FRU. There is an
internal RIO-2 bus imbedded in the system planar. The system planar contains both the
Enterprise RIO-2 hub and the PCI-X Host bridge chip to connect to the integrated I/O
packaged on the system planar. Two RIO-2 ports of the Enterprise hub chip are used for the
integrated I/O, and the remaining two ports are routed to external connectors.
The system planar provides five PCI-X slots and several integrated PCI devices that interface
to two EADS-X chips that function as PCI-X to PCI-X bridges to the primary PCI-X buses on
the PCI-X Host bridge chip.
PCI-X slot 5 can accept a short PCI-X or PCI card and its space is shared with the Remote
I/O expansion card. The remaining PCI-X slots are full length cards. The dual 10/100/1000
Mbps Ethernet adapter is integrated on the system planar.
11S 1234567 Y L12345678901 FRU P/N EC Level
Seven digits
IBM part number
Twelve digits
IBM plant identificator
and part serial number
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