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67 Cards in this Set
- Front
- Back
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PSU |
Power Supply Unit |
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Voltage |
The pressure of the electrons in the wire. |
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Amperage |
The amount of electrons moving past a point in a wire. |
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The amounts of amps and voltage needed for something to run/work |
Watts |
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Watts Equations |
V * A = W |
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Ohms |
Resistance |
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Circuit Breaker |
A heat sensitive or electromagnetically operated electrical switch rated for a specified amp |
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An electrical outlet must have ______ to be used with a computer. |
Ground |
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DC |
Direct Current |
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AC |
Alternating Current |
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What is the standard power connector in the US? |
IEC-320 |
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Standard AC voltage is.... |
~ 115 VAC (give or take 5V) |
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The rest of the world uses _______ VAC. |
220-240 |
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Dual Voltage Options |
Let's you choose between American standards or International on the Power Supply |
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Before connecting a computer to an electrical outlet what should you do? |
Use a multimeter to check outputs. Hot output approximately 115V Ground 0V |
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V - |
Direct Current |
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V ~ |
AC |
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Brownout |
When there is a large electricity sag |
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Blackout |
When power cuts out conpletely |
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Make sure to always have ________ __________ connected to your PC. |
Surge Suppresser. |
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Always make sure surge suppressors are rate by ______________ for __________. |
Underwriter Laboratories 1449 330V rating |
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What is the should the minimum joule rating of a Surge Suppressor be? |
2000 Joules at least |
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UPS |
Uninterruptible Power Supply |
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Modern Motherboards use a ___ or ___ pin P1 Power Connector |
20, 24 |
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What are the three types of peripheral connectors? |
Molex, Mini, and SATA |
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Molex connectors provide what voltages? |
5V and 12V |
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Molex connectors provide power for... |
Fans and older drives |
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Chamfers |
Notches on the Molex connector to guide the connection |
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Mini connectors provide how much voltage? |
5V and 12V |
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Mini connectors are used for what? |
Connecting the mostly extinct floppy drive. |
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What do you need to be careful of with the Mini Connector? |
Connected the right way as it will ruin the device if connected the wrong way. |
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SATA power connectors have how many pins? |
15 |
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SATA will work at what voltages? |
3.3, 5.0, 12.0V devices |
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Soft Power |
The power on switch tells BIOS to handle the power on procedures vs. Like a switch. |
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What is the first widespread ATX update? |
ATX 12V 1.3 - Introduced a 4pin motherboard power connector in 2003. Also introduced a 6pin auxiliary connector (AUX) to supply 3.3V or 5.0V |
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EPS12V |
Non-ATX motherboard and power supply developed by Server System infrastructure. 24 pin main motherboard connector. Also came with an AUX connector, an ATX12V P4 connector, and a unique 8-pin connector. |
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Rails |
Generally, all of the PC’s power comes from a single transformer that takes the AC current from a wall socket and converts it into DC current that is split into three primary DC voltage rails: 12.0 V, 5.0 V, and 3.3 V. Groups of wires run from each of these voltage rails to the various connectors. |
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What is the key circuitry that monitors the amount of amperage going through each rail? |
Over-Current Protection (OCP) |
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Single-Rail System |
A single OCP monitors all the pathways. |
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Multirails System |
Each pathway gets it's own OCP |
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CompTIA calls multi-rail what? |
Dual Rail |
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ATX12V 2.0 |
24 pin motherboard power connector that is backwards compatible to the 20-pin. Requires two 12V rails for any power supply rated higher than 230 Watts.Dropped the AUX for the for SATA drive connections. |
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Convertible pin connectors is not a compatible replacement for the __ connector |
P4 |
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Modern motherboards typically have a 8 pin connector used to support high end CPUs that demand a lot of power. Also referred to as a.... used to support high end CPUs that demand a lot of power. Also referred to as a.... |
EPS12V, EATX 12V, ATX12V 2x 4 |
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Auxiliary PCIe (PCIexpress) has how many pins? |
6 or 8 pins. |
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Do not confuse the 8 pin PCIe with the ______? |
EPS12V. |
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Common specialty power supply types: |
- Mini ATX and Micro ATX - TFX12V - SFX12V - CFX12V - LFX12V |
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TFX12V |
A small power supply form factor optimized for low-profile ATX systems |
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SF12V |
A small power supply form factor optimized for systems using FlexATX motherboards |
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CFX12V |
An L-shaped power supply optimized for microBTX systems |
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LFX12V |
A small power supply form factor optimized for low-profile BTX systems |
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Harmonics |
Electrical backpressure |
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Active Power Factor Correlation (PFC) |
Extra circuitry that smooths out the power coming from the wall before passing it to the main power supply circuits. |
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Never buy a power supply without.... |
Active PFC |
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What is the minimum wattage that a power supply needs to provide? |
Total wattage of all devices combined. |
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ATX12V 2.0 requires the differentials of wattage made to loss heat is ___? |
70% |
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As a general rule, make sure the power supply of a new PC provides how many watts? |
500 Watts |
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An ATX power supply is always... |
On |
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Freeware fan utility |
Speedfan |
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When using a multimeter to test a power supply, remember that the voltage is not exact and can vary by +- ___. |
10% |
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What part in the PC breaks more than any other? |
The power supply |
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What type of Fore Extoiguisher should you have when working with electrical equipment? |
Type C |
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Joachim ordered a new power supply but was surprised when it arrived because it had an extra 4-wire connector. What is that connector? |
P4 |
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What voltages should the two hot wires on a Molex connector read? |
Red = 5 V; Yellow = 12 V |
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A PC’s power supply provides DC power in what standard configuration? |
Three primary voltage rails, one each for 12-volt, 5-volt, and 3.3-volt connectors |
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How many pins does a SATA power connector have? |
15 |
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Multiple rails provides better protection of the power supply? True or False |
True |
