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Power Budget
Power Budgeting
Table 2-3 Model 744 Current Requirements Worksheet
Each Model 744 Board Computer
+5V dc
Amps
+12V dc
Amps
-12V dc
Amps
If 132 MHz, current for +5V dc is 4.7A
1
If 165 MHz, current for +5V dc is 6.3A
______
0.1A 0.1A
RAM cards (see Table 2-1 or Table 2-2)
________
Graphics subsystems
2
x 0.9A each =
FWD SCSI GSC card x 0.7A each =
HCRX graphics board 2.0A _
PMC bridge adapter 0.6A
PMC cards on bridge adapter
3
________ ________
Totals for Model 744 board computer ________ ________
1. Does not include on-board graphics, if installed.
2. On-board graphics and graphics accessory cards are each separate graphics subsystems.
3. PMC cards may also draw +3.3 current that is provided through the +5 on the bridge adapter.
The +3.3 current FOR ALL PMC CARDS ON THE BRIDGE ADAPTER AND EXPANSION
ADAPTER (do not include other expansion adapter currents) must be entered into the +5 column
after multiplying the +3.3 current by .75 to convert to the actual +5 current draw.