Specifications

dual ac modular bulk
Each BPS shown in Figure 14 can be thought of as two sub-power supplies housed in a single BPS
power supplies (BPS)
module. If only Grid A power cords are used, only one of the two sub-power supplies is in use.
The other supply sits idle until a second set of Grid B cords is used. The benefit of this design is
that when utilizing all four power cords, the rp8400 has 2N+1 redundant dc power protection.
The dual ac modular power supplies provide:
• the ability to purchase only the amount of power conversion necessary for the intended rp8400
configuration
• redundancy for both hardware failures and power input failures
• hot-plug capability for any BPS in a redundant configuration
• better data security, maintenance scheduling, and maintenance operations without system
interruption
ac power consumption
The HP Server rp8400 power consumption varies greatly, depending on the hardware
configuration and the input line voltages supplied at the customer site. Because energy efficiency
is of such high importance all over the world, HP represents power consumption in terms of
voltamperes (VA). There are two ways to represent consumption:
• theoretical maximum value—represents the maximum wattage of a given configuration,
assuming worst-case conditions (thermal tolerances, workloads, and so forth) on all system
components. It is extremely unlikely that any customer will experience power consumption
at the level specified as the theoretical maximum.
• typical value—represents the expected power consumption of a given configuration.
The typical value is the approximate power consumption that a customer will most likely
experience and can use for power budgeting purposes.
Following are the theoretical maximum and typical power consumption values for two different
rp8400 configurations:
fully loaded rp8400 configuration
The rp8400 fully loaded configuration consists of sixteen 875-MHz PA-8700+ processors, 64 GB
of memory, 16 PCI cards, four cell boards, four internal hard drives, two DVD drives, two core
I/O cards, and six bulk power supplies.
• theoretical maximum power consumption: 5,035 VA (25.2 A @ 200 Vac)
• typical power consumption: 3,046 VA (15.2A @ 200 Vac)
average rp8400 configuration
The rp8400 average configuration includes eight 875-MHz PA-8700+ processors, 16 GB of
memory, eight PCI cards, two cell boards, two internal hard drives, one DVD drive, two core
I/O cards, and four bulk power supplies.
• theoretical maximum power consumption: 2,550 VA (12.8A @ 200 Vac)
• typical power consumption: 1,675 VA (8.4A @ 200 Vac)
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