This appendix describes the power supplies units (PSUs) used with the Sun Fire X4600 and X4600 M2 servers. It also describes how the system configuration affects PSU requirements and redundancy.
Caution - The Sun Fire X4600 and X4600 M2 servers are designed to operate with all four PSUs in place. Leaving a PSU slot empty can interfere with proper airflow and cause the system to overheat.
Three power supplies are available for the Sun Fire X4600 and X4600 M2 servers: an 850 W PSU (300-1971), a 950 W PSU (300-2013), and an 1133 W PSU. The PSU models have the same physical form factor, but cannot be used together in the same system.
For the server to power up reliably, four PSUs must be working and connected to external AC power. Once the server is powered up, one or more PSUs is redundant. Redundant PSUs should be left in place. Depending on the configuration, redundancy is either 2+2 (server requires 2 working PSUs, with 2 redundant PSUs) or 3+1 (server requires 3 working PSUs, with 1 redundant PSU).
The specific PSU requirements and redundancy depend on the system configuration as described in the following sections:
Read the following notes regarding power supply redundancy for x4600 configurations:
2+2 Power Redundancy is supported as follows:
1. X4600 rev E, (850w OR 950w PSU) ,with CPLD version 8 - both 4 and 8 CPU module configurations supported with full memory and full I/O. If you have CPLD version 4 - your rev E system will support 3+1 Power only.
2. X4600 M2 (850w OR 950W PSU)with 4 or 8 95W rev F processors are supported, with full memory and full I/O. This includes the 8218 2.6GHz rev F processor.
3. X4600 M2 (850w PSU)with 4 120W rev F processors are supported, with full memory and full I/O. This includes the 8220SE 2.8GHz rev F 120W processors.
An 8-socket 120W rev F processor system with full memory and full I/O achieves only 3+1 power with 850w PSU, full 2+2 is achieved by having the 950w PSU in this configuration.
The mixing of 950w and 850w PSU's on the same system is not supported.
105w CPU redundancy: For 8 sockets with 8360SE, maximum memory and I/O, 3+1 power redundancy using a 950W PS is supported, but not 2+2.
For 2 and 4-processor configurations involving the 8360SE processors, with up to max possible memory and I/O, the system can operate in 2+2 power redundancy mode with the 950W PSUs.
For 6 and 8-processor, 3+1 power redundancy is supported, but not 2+2.
Note - 950W PSU requirements apply to the 1133 W PSU.
Note - Depending on the configuration, it may be possible to power up a server with fewer than four PSUs working and connected to external power. However, use of less than four PSUs may not be reliable and is not supported.
Caution - Always replace faulty power supplies as soon as possible.
To identify the Sun Fire X4600 CPU module, refer to F.1.1 Sun Fire X4600 CPU Module.
Servers with this module can use either 850W or 950W PSUs.The PSU redundancy depends on the CPLD version of the motherboard:
If the motherboard has CPLD version 4, the PSUs have 2+2 redundancy.
If the motherboard has a previous CPLD version, the PSUs have 3+1 redundancy.
The CPLD version is reported at boot time, during power-on self-test (POST). For an example, see CPLD Version Screen .
AMIBIOS(C)2004 American Megatrends, Inc. BIOS Build Version : 0ABIT032 Date: 10/03/06 10:35:39 Core: 08.00.12 CPU : AMD Engineering Sample Speed : 2.80 GHz Count : 8 DRAM Clocking CPU0 Core0/1 = 667 MHz, CPU1 Core0/1 = 667 MHz, CPU2 Core0/1 = 667 MHz, CPU3 Core0/1 = 667 MHz Sun Fire X4600 M2, 4 AMD North Bridges, Rev F2 1 AMD 8132 PCI-X 2.0 Controller, Rev B2 1 NVidia CK8-04 PRO SB, 1 NVidia IO-4 Slave Bridge(s) BMC Firmware Revision : 1.00.06 CPLD Revision : 2.0 Initializing USB Controllers .. Done. Press F2 to run Setup (CTRL+E on Remote Keyboard) Press F8 for BBS POPUP (CTRL+P on Remote Keyboard) Press F12 to boot from the network (CTRL+N on Remote Keyboard) 5449MB OK
The various models of CPU modules used in Sun Fire X4600 M2 servers all have the power requirements and redundancy described in this section. Servers with these modules can use either 850W or 950W PSUs. However, if you require 2+2 redundancy, you may have to use 950W PSUs. Follow these rules.
If 95W CPUs are used, PSUs have 2+2 redundancy.
If 120W CPUs are used and the server has 2 or 4 CPU modules, PSUs have 2+2 redundancy.
If 120W CPUs are used and the server has 6 or 8 CPU modules, redundancy depends on the PSUs used:
If 850W PSUs are used, they have 3+1 redundancy.
If 950W PSUs are used, they have 2+2 redundancy.
Note - 950W PSU rules apply to the 1133 W PSU.
These rules are summarized in PSU Redundancy in Sun Fire X4600 M2 Servers.