Apple Workgroup Server 8550 - Manual (Page 108)

Audio and telecommunications devices
The following table shows power allowances for external devices connected
to input ports.
Device Voltage Current Power
Microphone +5 V 20 mA 100 mW
GeoPort telecom adapter +5 V 500 mA 2.5 W
Expansion cards and devices
If you add a PCI expansion card, a 5.25-inch storage device, or a 3.5-inch
storage device to your server, make sure the component’s power requirements
don’t exceed the maximum power allowances allocated to it by the server.
The maximum power allowances for expansion cards in your server can
accommodate three 15-watt or two 25-watt cards. Detailed guidelines are
presented in the following table.
Device Voltage Current Power
Expansion card (15 watts)* +5 V 3 A 15 W
(PCI) +12 V 0.500 A 6 W
–12 V 0.100 A 1.2 W
+3.3 V 2 A 6.6 W
Expansion card (25 watts)** +5 V 5 A 25 W
(PCI) +12 V 0.500 A 6 W
–12 V 0.100 A 1.2 W
+3.3 V 2 A 6.6 W
Storage device +5 V 9 A 45 W
(such as a CD-ROM drive) +12 V 3 A 36 W
+12 V 7.5 A peak*** —
*15-watt expansion cards should not consume more than 15 watts of power total.
**25-watt cards should not consume more than 25 watts of power total.
***Peak power is for startup only and must not occur in normal operation.
Specifications 99