User Manual B410PT
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Use these worksheet below to calculate the total power used by your configuration. List all
current into the appropriate voltage level for each device and calculate the total current on each
voltage level
7. Power Budget Calculation
7.1 275W Power Supply
Current ( Maximum ) at voltage level:
Device
+5Vsb
+3.3V
+5V
+12V
-5V
-12V
Port Townsend Board
Processor
Total Memory
Hard Disk Drive
Total Add-in-Cards
4 x System Fans
2.8
Total Current
Maximum ratings (275W)
2.5
17
18
23
0.3
DO NOT OVERLOAD: Do not exceed power limit for any DC outputs
From the worksheet above, enter the total current for each colume, multiply the voltage by the
total current to get the total wattage for each voltage level. Add all the Wattage up and find the
total power usage.
Voltage Level and Current
Ohm’s Law (Volts x Amperes=Power)
Power (Watts) on each Voltage Level
(+5Vsb) x ( )A
(+5.3V) x ( )A
(+ 5 V ) x ( )A
(+ 12V) x ( )A
(- 5V ) x ( )A
(- 12V) x ( )A
Total Combined Wattage
Table 9 Power budget calculation (per blade)
Table 10 Total combined wattage calculation (per blade)