System ambient
after altitude
derating (°C)
Maximum
supported power
dissipation (W) for
85° C or above still
air rated PCIe
cards
Maximum
supported power
dissipation (W) for
70° C still air rated
PCIe cards
Maximum
supported power
dissipation (W) for
55°C still air rated
PCIe cards
20 15 12 8
25 14 10 6
30 13 9 5
35 12 8 4
40 10 6 3
45 9 5 2
50 8 4 1
55 6 3 Not supported
60 5 2 Not supported
65 4 1 Not supported
70 3 Not supported Not supported
NOTE: PCIe cards must support still air environment and must not require
active cooling
NOTE: PCIe cards rated above 25W are not supported regardless of
temperature rating
NOTE: If a PCIe card is rated at a temperature that has not shown in the
table, use interpolation to calculate the maximum supported power.
NOTE: If a PCIe card is rated at a temperature greater than 85°C, it shall be
treated as an 85°C rated card in determining the supported power.
I/O Module Overview 40
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