Chapter 20 Power System: Description/Calculating Power Usage
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Table 20-4. Worksheet for Calculating DC Power Usage (continued)
Current (maximum) at voltage levels:
Device +3.3 V +5 V stby +5 V +12 V -12 V
Front panel plus six cooling fans 4.0 A
Total Current
✏NOTE
The total combined wattage must be less than 935 watts for your server
configuration. The current for each voltage level must be less than the limits
prescribed by the above power supply output voltage specification; see
Table 20-2.
Table 20-5. Total Combined Power Used by Your Server
Voltage Level and Total Current (V x A = W) Total Watts for Each Voltage Level
(+3.3 V) x ( A) W
(+5 V) x ( A) W
(-5 V) x ( A) W
(+12 V) x ( A) W
(-12 V) x ( A) W
(+5 V Standby) x ( A) W
Total Combined Wattage = W