17
IMPORTANT Refer to Table 4 to select the appropriate size circuit breaker for systems configured without a
full complement of cells, memory, and I/O.
Table 4 shows Superdome power requirements by configuration (i.e. number of cell boards, amount of memory
per cell, and number of I/O chassis). This requirement applies to 32-way-capable systems with PA8600 or
PA8700 processors.
There are two columns of power numbers (Watts). The Power Breaker column shows the power used to size
the wall breaker at the installation site. The Typical Power column shows typical power. Typical power
numbers are for PA8600 systems and may be used to assess average utility cost of cooling and electrical
power. Expect these typical numbers to be about 18% less for PA8700 systems. Table 4 also shows the
recommended breaker sizes for 4-wire and 5-wire sources
Table 4 Typical Superdome Configurations
Cell
Boards
Memory
Per Cell
Board
I/O
Chassis
Modules
Breaker
Power
a
Recommended
3-pole Breaker
Size
a,b
Recommended
4-pole Breaker
Size
a,c
Typical
Power
Typical
Cooling
Qty. GBytes Qty. Watts Amps (min.) Amps (min.) Watts BTU/HR
8 16 4 10660 40 25 8460 28,850
8 16 2 9600 40 25 7780 26,530
8 8 4 9220 40 25 7340 25,030
8 8 2 8160 30 20 6660 22,710
8 4 4 8500 35 20 6780 23,120
8 4 2 7440 30 20 6100 20,800
6 16 4 9040 35 20 7140 24,350
6 16 2 7980 30 20 6460 22,030
6 8 4 7960 30 20 6300 21,480
6 8 2 6900 30 20 5620 19,160
6 4 4 7420 30 20 5880 20,050
6 4 2 6360 30 20 5200 17,730
4 16 4 7420 30 20 5820 19,850
4 16 2 6360 30 20 5140 17,530
4 8 4 6700 30 20 5260 17,940
4 8 2 5640 25 20 4580 15,620
4 4 4 6340 30 20 4980 16,980
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