3.5 – Power Supply Unit [PSU Form Factors]

Question 1

ATX vs SFX

Answer 1

o ATX PSUs are used in computer cases that support ATX & micro-ATX motherboards [standard]

o SFX PSUs are used in computer cases that support mini-ITX or smaller form factors

Question 2

Molex Power Connectors

Answer 2

Supplies 5v & 12v

Used by IDE drives, case fans & other devices

AKA = standard connector

Question 3

SATA power connector

Answer 3

Supplies 5v, 12v, & 3.3v

Used on SATA drives only

Question 4

PCIe Power Connector

Answer 4

a. Used to give additional power to PCIe video cards

b. 6-pin supplies 3 rails of 12v

c. 8-pin supplies 4 rails of 12v

Question 5

ATX Connector

Answer 5

o Supplies 5v, 12v, & 3.3v

o Gives power to motherboard

o 20 pin & 24 pin

Question 6

ATX 12v

Answer 6

o 4-pin connector AKA = P4 connector

o Connects to motherboard to give power to CPU

Question 7

Voltage Regulator Button

Answer 7

Red Button [US = 110, 115, 120]

o DON’T change = send out too much voltage blow power supply

o Little button to change voltage