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Appendix C: Equipment log and configuration worksheets
200
Calculating the total combined power used
by the system
1 From the previous worksheet, enter the total current for each
column in the Power Usage Worksheet 2.
2 Multiply the voltage by the total current to get the total wattage
for each voltage level.
3 Add the total wattage for each voltage level to arrive at the total
combined power usage of the power supply.
3rd 5.25-inch
peripheral
drive
+3.3 V +5 V
5 V
Standby
+12 V -12 V
Fans
Total
Current
Power Usage Worksheet 2
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
Total Combined Wattage ________ W
Power Usage Worksheet 1
Device Current (maximum) voltage level
AA G900 ug - EN.book Page 200 Wednesday, September 25, 2002 5:23 PM