QuickSpecs

AC Power
AC PowerAC Power
AC Power
The HP Integrity rx8640 Server contains four C20 power receptacle ports located at the bottom rear
bulkhead. A minimum of two power cords must be used to maintain normal operation of the HP Integrity
rx8640 Server. A second set of two cords can be added to improve system availability by protecting, for
example, against power grid failures or accidentally tripped circuit breakers. The HP Integrity rx8640
Server hardware is capable of receiving AC input from two different AC power sources. The objective is
to maintain full equipment functionality when operating from power source A and power source B, or A
alone, or B alone. This capability is called "fault tolerant power compliance."
Although many HP Integrity rx8640 Server configurations can be sufficiently powered from a single 16
/20 amp branch circuit, HP strongly recommends using one 16-amp (minimum) branch circuit per
power cord. Due to the variety of 16/20 plugs used throughout the world, the HP Integrity rx8640 Server
menu offers a choice of plug options.
All HP Integrity rx8620 servers are shipped with four AC power cords.
The drawing below represents the power receptacle ports on the HP Integrity rx8640 Server. If only two
power cords are used, they must be plugged into either A0 and A1, or B0 and B1.
AC Power Consumption
AC Power ConsumptionAC Power Consumption
AC Power Consumption
The HP Integrity rx8640 Server power consumption will vary greatly depending on the hardware
configuration and the input line voltages supplied at customer sites. Because of the disparity of line
voltages throughout the world it's best to represent power consumption in VA (Volt Amperes). With power
consumption being of high concern throughout the world, it's necessary to specify consumption in a
couple of different ways.
Maximum Theoretical Power
Maximum Theoretical Power Maximum Theoretical Power
Maximum Theoretical Power or "Maximum Configuration" (input power at the AC input expressed
as volt amps to take into account power factor correction)–The calculated sum of the maximum
worst case power consumption for every subsystem in the server. This number will never be
exceeded by a functioning server for any combination of hardware and software under any
conditions.
Marked Electrical Power
Marked Electrical PowerMarked Electrical Power
Marked Electrical Power (input power at the AC input expressed as volt amps)–The server Marked
Electrical Power is the rating given on the chassis label and represents the input power required for
facility AC power planning and wiring requirements. This number represents the expected
maximum power consumption for the server based on the power rating of the bulk power supplies.
This number can safely be used to size AC circuits and breakers for the system under all
conditions.
Typical Maximum Power,
Typical Maximum Power, Typical Maximum Power,
Typical Maximum Power, User Expected Maximum Power, or "Typical Configuration" (expressed
as volt amps)–The measured maximum worst case power consumption. This number represents
the larges power consumption that HP engineers were able to produce for the server with any
combination of hardware under laboratory conditions using aggressive software applications
designed specifically to work the system at maximum load. This number can safely be used to
compute thermal loads and power consumption for the system under all conditions.
Power Numbers per configuration are shown below. For further power consumption details, see the HP
Integrity rx8640 Installation Manual.
QuickSpecs
HP Integrity rx8640 Server
HP Integrity rx8640 ServerHP Integrity rx8640 Server
HP Integrity rx8640 Server
Configuration
DA - 12471 Worldwide — Version 14 — November 8, 2007 Page 20