HP Onboard Administrator - Manual (Page 251)

Configuring the HP BladeSystem c7000 enclosure and enclosure devices 251
server blades receive more power than idle server blades. This power allocation improves aggregate
enclosure performance.
BladeSystem server power caps are set in the Onboard Administrator. Enclosure Dynamic Power Capping
protects both cooling and electrical infrastructures. Enclosure Dynamic Power Capping works with either
firmware-based power capping technology on the server or with the fast, hardware-based technology. The
Enclosure Dynamic Power Capping solution performs better if the server blades that support the fast,
hardware-based capping technology are upgraded.
Enclosure Dynamic Power Capping requires Onboard Administrator 2.30 (or later), iLO 2 version 1.70 (or
later), and System ROM/BIOS dated 10/1/2008 (or later).
NOTE: Power caps set for less than 50% of the difference between maximum power and idle
power might become unreachable due to changes in the server. Power caps set for less than 20%
are not recommended, and might cause the server to reboot or the server operating system to stop
responding.