Power Flashcards
1
Q
watts = x * y
A
volts * amps = watts
2
Q
AC power is used by:
A
the power grid
3
Q
DC power is used by:
A
computer components
4
Q
110-120V AC (VAC)
A
US/Canada
5
Q
220-240V AC (VAC)
A
Europe
6
Q
60hz (hertz)
A
US/Canada
7
Q
50hz (hertz)
A
Europe
8
Q
Motherboard power
(+) __V
(+/-) __V
(+/-) __V
A
+3.3V
+/- 5V
+/- 12V
9
Q
PCIe adapters, hard drive motors, cooling fans,
most modern components
A
+12V
10
Q
Some motherboard components
A
+5V
11
Q
M.2 slots, RAM slots, motherboard logic circuits
A
+3.3V
12
Q
Integrated LAN, older serial ports, some PCI cards
A
-12V
13
Q
Available for ISA adapter cards (though today’s motherboards don’t have ISA slots)
A
-5V
14
Q
How do you decide the size of a power supply you need?
A
watts needed by all computer components x2
