Installing a hot-swap ac power supplyThe following notes describe the type of ac power supply that the server supportsand other information that you must consider when you install a power supply:v Make sure that the devices that you are installing are supported. For a list ofsupported optional devices for the server, see http://www.ibm.com/systems/info/x86servers/serverproven/compat/us/.v Before you install an additional power supply or replace a power supply with oneof a different wattage, you may use the IBM Power Configurator utility todetermine current system power consumption. For more information and todownload the utility, go to http://www-03.ibm.com/systems/bladecenter/resources/powerconfig.html.v The server comes with one hot-swap 12-volt output power supply that connectsto power supply bay 1. The input voltage is 110 V ac or 220 V ac auto-sensing.v You cannot mix 460-watt and 675-watt power supplies, high-efficiency andnon-high-efficiency power supplies, or ac and dc power supplies in the server.v The following information applies when you install 460-watt power supplies in theserver:– A warning message is generated if the total power consumption exceeds 400watts and the server only has one operational 460-watt power supply. In thiscase, the server can still operate under normal condition. Before you installadditional components in the server, you must install an additional powersupply– The server automatically shuts down if the total power consumption exceedsthe total power supply output capacity– You can enable the power capping feature in the Setup utility to control andmonitor power consumption in the server (see “Setup utility menu choices” onpage 145)The following table lists the system status when you install 460-watt powersupplies in the server:Table 12. System status with 460-watt power supplies installedTotal system powerconsumption (inwatts)Number of 460-watt power supplies installedOne Two Two with one failure< 400 Normal Normal, redundantpowerNormal400 ~ 460 Normal, statuswarningNormal, redundantpowerNormal, statuswarning> 460 System shutdown Normal System shutdownv Power supply 1 is the default/primary power supply. If power supply 1 fails, youmust replace the power supply immediately.v You can order an optional power supply for redundancy.v These power supplies are designed for parallel operation. In the event of apower-supply failure, the redundant power supply continues to power the system.The server supports a maximum of two power supplies.v For instructions on how to install a hot-swap dc power supply, refer to thedocumentation that comes with the dc power supply.Statement 5:112 System x3650 M3 Types 4255, 7945, and 7949: Installation and User’s Guide
