
Expansion cards and other internal devices
If you add an expansion card or a storage device to your computer, make sure the component’s
power requirements don’t exceed the maximum power allowances allocated to it by the computer.
The maximum power allowances for expansion cards in your computer can accommodate
three 15-watt cards, two 25-watt cards, or one 15-watt card and one-25 watt card. Some
detailed guidelines are presented in the following table.
Device Voltage Current Power
Expansion card (15 watts)
1
+5 V 3 A 15 W
+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)
2
+5 V 5 A 25 W
+12 V 0.500 A 6 W
–12 V 0.100 A 1.2 W
+3.3 V 2 A 6.6 W
Storage devices +5 V 3 A 15 W
(such as a hard disk) +12 V 2.3 A 27.6 W
+12 V 6.2 A peak
3
—
1 15-watt expansion cards should not consume more than 15 watts of total power.
2 25-watt expansion cards should not consume more than 25 watts of total power.
3 Peak power is for startup only and must not occur in normal operation.
CD-ROM drive
Disc speed
m 24x (twenty-four-times speed)
Disc diameters supported
m 120 mm (4.7 inches)
m 80 mm (3.2 inches)
Data capacity
m 656 MB, Mode 1
m 748 MB, Mode 2
9
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