This power supply option contains two hot-swap 1300W, -36/-75VDC (-48VDC nominal) power supplies to provide both power and redundancy to your IBM BladeCenter T. Two 2.8m (nine foot) IEC309 C19 to C20 rack cables are included for attachment to a supported -36/-75VDC power distribution unit. BladeCenter T supports four power modules. Two 1300W hot-swap, redundant power modules are standard and support the population of BladeCenter T bays 1 through 4. This 1300W Power Supply Module is required to support installation of blade servers in BladeCenter T bays 5 through 8. BladeCenter T customers must use power supplies of identical wattages to ensure power redundancy and should not mix power supplies of different wattages.