EXPANSION CHASSIS
3-2
600-2708 PCI Express Expansion System User’s Manual
Revision 1.0, June 2010
Table 3-1. PCIe- 451 Power Requirements
The chassis contains a 680W ATX12V power supply with two independent 12V outputs, however only
+12-V1 is used by the PCIe-451. The PCIe-451 can support 25W of +12V power at all eight slots.
Assuming the cards also draw the maximum 10W from +3.3V, then a fully populated chassis would
have about 370W surplus power available for peripheral components.
Table 3-2. PCIe- 425 Power Requirements
* The PCIe-425 does not use +12V
Table 3-3.
Power Supplied Per PCIe Slot
3.6
PCI-E AUXILARY POWER CONNECTORS
Some PCIe add-in cards require more power than the PCIe slot connector can provide. These cards will
have a six position, two row by three column, Molex type power connector probably located at the top
or rear edge of the card. The power supply in the expansion chassis has two PCIe auxilary power cables
available for these card types.
Voltage
Current Minimum
Current Typical
Current Maximum
Where Used
+3.3V
0.300 Amps
1.2 Amps
(24 + 1.2) Amps*
Slots J1-J8 and
baseboard
+5V
0.100 Amps**
0.100 Amps
0.100 Amps
Not used
+12V-1
0.00 Amps
0.00 Amps
16.8 Amps***
Slots J1- J8 only
+12V-2
0.00 Amps
0.00 Amps
0.00 Amps
Not used
-12V
0.00 Amps
0.00 Amps
0.00 Amps
Not used
-5V
0.00 Amps
0.00 Amps
0.00 Amps
Not used
+5VSB
0.00 Amps
0.00 Amps
0.00 Amps
Not used
Voltage
Current Typical
Current Maximum
+3.3V
0.62 Amps
0.87 Amps
+12V
0 Amps
0 Amps
Voltage
Current Maximum
Voltage Tolerance
+3.3V
3.0 Amps
+/- 9%
+12V
2.1 Amps
+/- 8%
