This post discusses the Standard IBM Bladecenter Chassis, not the T -or H Chassis systems. A common warning message you might recieve from an IBM Bladecenter is as follows: "Demand exceeds a single power module. Throttling can occur in power domain 1." The message is normal.In a normal rudundant situation, all power needs are drawn from both PSU's, so you effectively have 2 x 2000 = 4000w for a single power domain during normal running. Its not a fail-over system, its drawns its power from both PSU's ......