Computer Power Supplies

Question 1

This connector had 20-pins. delivering a combination of 3.3V, 5V, and 12V power

Answer 1

older ATX PSUs

Question 2

Introduced a 24-pin connector which adds one additional line of each type

Answer 2

ATX 2.0 standard

Question 3

Power supply that works in both the 20-pin and 24-pin motherboard?

Answer 3

two-piece “20+4” connector

Question 4

Originally used to connect pre-SATA floppy and hard disk drives

Answer 4

4-pin Molex

Question 5

Used to provide 12V of power to many different types of peripheral devices, such as add-on fans, video cards, case lighting

Answer 5

4-pin Molex

Question 6

Used to provide additional power to a PCIe video card

Answer 6

6-pin PCIe or 8-pin PCIe

Question 7

How many watts does a PCIe slot draw?

Answer 7

75 watts

Question 8

How much additional power is provided by a 6-pin PCIe connector? 8-pin PCIe connector?

Answer 8

75 watts and 150 watts

Question 9

Supplies additional power to the CPU beyond what the 24-pin connector can deliver

Answer 9

ATX 4-pin 12V

Question 10

An 8-pin 12V connector, which supplies more power to the CPU than the ATX 12V 4-pin connector

Answer 10

EPS 12V connector

Question 11

Which power connector type is used to provide power to modern hard disk drives?

Answer 11

15-pin SATA connector

Question 12

Which power supply connector is used to provide 12 volt of power to add on fans, video cards, and case lighting?

Answer 12

4-pin Molex

Question 13

Supplies power to the motherboard and is the largest connector on the power supply unit

Answer 13

24-pin ATX

Question 14

Supplies additional power to the CPU even more than the largest connector

Answer 14

ATX 4 pin 12 V

Question 15

Connects pre-SATA floppy and hard discs drives and provides 12V of power to many peripheral devices

Answer 15

4 pin Molex

Question 16

Supplies power to SATA based hard and optical drives with different power voltages (3.3v, 5v, 12v)

Answer 16

15-pin SATA

Question 17

Factors that must be considered when selecting a power supply unit (PSU) for a computer

Answer 17

1. Select the correct form factor and size.
2. Determine the wattage needed.
3. Verify the PSU has all the different connector types needed.
4. Determine whether a single-rail or multi-rail PSU is needed.
5. Determine whether a dual or single voltage is needed.
6. Select an appropriate PSU fan size.
7. Consider a PSU with a higher efficiency rating.

Question 18

Tools needed for replacing a DC power jack

Answer 18

1. Soldering iron
2. Rosin core solder
3. Desoldering pump
4. Isopropyl alcohol
5. Toothbrush

Question 19

A PSU configuration that provides separate 12V circuits in order to provide extra protection against power spikes on high current circuits.

Answer 19

Multi-rail PSU

Question 20

A PSU configuration in which all computer components share the PSU’s single 12V circuit, drawing what they need, when they need it from a single source

Answer 20

Single-rail PSU

Question 21

Uses a 4-pin connector that provides 5 or 12 volts

Answer 21

ATA hard drives