Table 2. Power Capacity At +5.2 Volts (Ac Power Supplies); Table 3. Power Capacity At +5.2 Volts (Dc Power Supplies) - IBM Nways 8265 Product Description

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IBM 8265: Product Description
Power Capacity for Modules
The following tables show the power capacity (at +5.2 volts) available in non-fault
tolerant and fault-tolerant modes. When calculating the number of power supplies
required, you must also allow for the system overhead (power used by the fan units
and backplane) which is 1 Watt.
415 W AC Power Supplies:

Table 2. Power Capacity at +5.2 Volts (AC Power Supplies)

Number of Power
Supplies
One
Two
Three
Four
Note:
295 W DC Power Supplies:

Table 3. Power Capacity at +5.2 Volts (DC Power Supplies)

Number of Power
Supplies
One
Two
Three
Four
Note:
Using 8260 295 W AC Power Supplies
Although you can install both 8265 415 W and 8260 295 W AC power supplies in the
same switch, this should be avoided when running in power fault-tolerant mode. This
is because the lower output power supply (295 Watt) cannot backup a higher output
power supply (415 Watt). See the IBM 8260 Nways Multiprotocol Switching Hub
Product Description , GA33-0415 for power capacities when a mixture of 415 W and
295 W AC power supplies are used.
Non-Fault Tolerant
Mode
301
542
813
1084
Power fault-tolerance can only be established if the unallocated
power budget (of at least one power supply) can be held in reserve.
Non-Fault Tolerant
Mode
204
367
551
734
Power fault-tolerance can only be established if the unallocated
power budget (of at least one power supply) can be held in reserve.
Fault Tolerant Mode
See note
301
542
813
Fault Tolerant Mode
See note
204
367
551