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BTX Motherboard Form Factor

How to install a power supply

The first BTX motherboards

were ATX motherboards

turned upside down, except

for the component location

that really were BTX positioning.

(en.Wikipedia.org/wiki/BTX_

(form_factor)

How to install a power supply

7. PCIe Express power

6-pin and 8-pin PCI Express power

connectors are required of almost every

mid-to high end graphics cards. Depending on

the model a card may require one or two

6-pin connectors, or one 6-pin and one 8-pin.

If you plan to run dual graphic cards then is

obviously doubled! (www.techradar.com)

BTX PSU

9. Adapters

As connectors and requirements have

changed over the years, instead of making

older PSUs redundant companies have

simply offer adapters. These take one or

two Molex connectors and convert them

into SATA, PCIe 6-pin and PCIe 8-pin

power connectors. (www.techradar.com)

6-pin and 8-pin PCIe power connectors

8. Molex and SATA

The remaining power connectors are usually

used to power any optical drives and hard drives

in a system, the old 4-pin Molex connectors

mostly used here. SATA hard drives is the final

exception requiring the SATA power connectors,

but many drives provide connectors for Molex as

well, in this case only use one or the other not

both. (www.techradar.com)

Molex and SATA connectors

Adapters

6. ATX 12V power

The ATX 12V connector is specifically designed

to power the processor with a clean 12V supply

and should be powered from its own 12V rail.

The original and current version is a square 4-pin

design that is suitable for more motherboards,

however high-end Intel motherboards, mostly

socket 1366 models require an up rated 8-pin

version. So check your motherboard before

buying a PSU. (www.techradar.com)

ATX 12V Connector

How to install a power supply

3. Mount the PSU

The standard ATX mount points on a PSU

are all the same. In some cases you may need

to remove the CPU cooler or the case to gain

full access. For tower cases it’s usually easiest

to place the case on its side, as then you can

rest the PSU on its side. (www.techradar.com)

How to install a power supply; How much power

Testing Power Supplies Continued

4. Secure the PSU

The PSU is screwed in place

using four standard ATX is case

screw, make sure you can see all

four before screwing it into place,

as it possible to install the PSU

the wrong way.

(www.techradar.com)

Mean Time Between Failure

Installing new PSU

Always properly remote PSU.

Calculated MTBF value of 100,000 hours. About 11 years of continuous operation. (www.techwarelabs.com)

2. Make sure you choose a suitably

powerful PSU. As a rough guide you

need to add the wattage used,

sometimes called the TDP, for the

processor and graphic card. These

are the two main power eaters and it’s

important the 12V rail on your new

PSU will supply enough power to

both. If in doubt use an online PSU

calculator

(http://www.coolermaster.com/psu_ calculator.php).

Symptoms of a failing PSU

1. The system does not start

2. The system shuts off

3. The system reboots

4. Fan does not run or is noisy

(techradar.com)

Extreme Silent PSU

Never open a PSU, because they

still hold a electric charge, even when

unplugged always replace bad PSUs.

MTBF 100,000 hours or 11 years

IBM Power Supplies continued

The 12 volt rail was used primarily to operate fans and

floppy disk drive motors. The original PC PSU could

deliver a maximum 63.5 watts most of which was on the

5 volt rail. As time passed, PCs included bigger, faster

chips which increased the load on the 5 volt rail. As technology improved, more devices where added, like

hard disk drives and CD-ROM drives so the 12 volt rail

had to deliver more power too.

How to install a power supply

IBM power Supplies continued

As technology improve, the transistor in the

chips continued to shrink and they needed

to run off of voltages lower than 3.3 volts. It was not practical to continue to run all the chips directly of the voltage provided by the PSU because they would have to add more and more lower voltage rails as time passed.

Gaming series

800w ATXeps

Bronze mini ATX

10. Tidy up

A neat case is a happy case. Leaving

cables all over the case can interfere

with air flow and lead to the

system running hotter than normal.

(www.techradar.com)

Testing Power Supplies

750gaming 120mm fan slient ATX PSU 12V

Power Supplies continued

How to install a power supply

Always tidy up before closing case.

When choosing a power supply

make sure it includes all the

necessary connectors for the

type of motherboard you will be

using. (www.techradar.com)

You can use a power supply tester or a

multimeter to test a power supply. If the

+/-12 volt power supply drops below +/-10.8

volts or if the +/-5 volts drop below +/-4.5 volts,

the unit is may be failing and it should be

replaced. The PSU can be tested by turning on

the PSU, and inserting a shunt on pin 16 and a

ground pin 15 or 17 on the motherboard

connector. (Testout.com)

ABT-520MA1W 520

ATX PSU

PC-LCD power supply tester

5. ATX power

This is 20/24-pin ATX main

motherboard power

connector, older systems

only use the first 20-pin. In

this case the extra 4-pins

can simply over hang the

socket or some PSUshave a

connector where the last

four pins unclasped.

(www.techradar.com)

20/24-pin ATX motherboard power connector

Power Supplies

Power supplies must match the motherboard case and form factor.

Types of form factors are ATX, micro ATX, and ITX.

If you have an ATX motherboard, purchase an ATX power supply.

If you have BTX motherboard,

purchase a BTX power supply. Pico BTX is a

motherboard form factor that is meant to miniaturize the 12.8 x 10.5 in (325 x 267mm) BTX standard. Pico motherboards measure 8 x 10.5 in (203 x 267mm). This is

smaller than current "micro-sized motherboards, hence

the name "pico". These motherboards share a common

top half with other sizes in the BTX line, but support

only one or two expansion slots, designed for half-height

or riser-cards applications.(en.wikipedia.org/wiki/BTX_(form_factor)

ICEBERG 680W ATX

Power Supply Connectors

Power Supply Units

Testing Power Supplies continued

A Power supply unit converts AC to low-

voltage DC power for internal components

of a computer. Modern personal computers universally use a switched-mode power

supply. Some power supplies have a manual selector for input voltage, while others automatically adapt to the supply voltage.

(Testout.com)

Symptoms of a failing PSU The system does not

start. The system shuts off. The system reboots

Fan does not run or is noisy. Never open a PSU,

because they still hold a electric charge, even

when unplugged. Always replace bad PSUs.

24-pin ATX,

4-pin Molex,

4-pin FDD,

4- pin p4_12V,

15 -pin SATA2,

6-pin PCI express,

6-pin Aux,

4-pin hp video power,

6-pin dell_p6

IBM Power Supplies Continued

Open PSU

Mini BTX PSU

PSU connector wires

(techwarelabs.com/articles)

BTX Power Supply Unit

As technology improve, the transistor in

the chips continued to shrink and they

needed to run off of voltages lower than

3.3 volts. It was not practical to continue

to run all the chips directly of the voltage

provided by the PSU because they would

have to add more and more lower voltage

rails as time passed. (www.playtool.com)

BTX- Balanced Technology Extended.

The BTX power supply was originally intended to replace the ATX power supply unit in late 2004 and early 2005. IT designed for the BTX Motherboard; which was supposed to alleviate some that arose from newer technology, which often demand more power and created more heat. (www.Ask.com)

Power Supplies Continued

Power Supply Units

Micro BTX PSU

750 Gaming 120mm fan mini BTX PSU

No Power, No Go!

A computer system will not start without a properly operating power supply unit,

that will support the system power requirements.

Each separate voltage output is

referred to as a rail. Rails refer to

a single voltage provided by the

PSU (power supply unit). Many

power supplies have a switch on

the back that turns the power on

and off. Power supplies include a

fan that help cool the system.

(Testout.com)

Sources and References

R2 800W ATX

500W 12V Aluminum ATX PSU blue

There are two types of power supplies:

1. ATX

2. BTX

Let's look at the history!

BTX Continued

By Maurice Sumter

The BTX standard was proposed by Intel, but future development of BTX retail products by

Intel was canceled in September 2006 following Intel’s decision to refocus on low-power CPUs, after suffering scaling and thermal issues with

the Pentium 4. The first company to implement BTX was Gateway inc, followed by Dell and MPC.

(www.Ask.com)

Biography

www.techwarelabs.com/articles,

www.Testout .com

www.Ask.com

en. Wikipedia.org/wiki/ATX

www. playtool.com

en.wikipedia.org/wiki/BTX_(form_factor)

www.techradar.com

Pictures

www.tomshardware.com

www.Amazon.com

en. Wikipedia.org/wik/ATX

www.ebay.com

BTX PSU with ATX

compatible connectors

Always read motherboard documentation before installing a new PSU

Power Supplies Continued

History of ATX and BTX

ATX- Advanced Technology eXtended .

The ATX Motherboard was introduced in

1995. The official specifications ATX Motherboard released by Intel in 1995 has

been revised many times since. The most

recent ATX Motherboard specification is

version 2.2. The most recent ATX 12V power supply unit specification version is 2.31

revised in mid 2008. (en.wikipedia.org)

hp Q57 Elite 8100 MS-7557 mini BTX PSU

The original IBM PC drew most of their

power from two rails: 5 volts and 12 volts.

Their power supplies also provided

-5 and -12 volts but those only delivered

small amounts of power. They had a 5 volt

rail because that was the voltage needed to

power most of the standard silicon chips of

the time. (playtool.com)

Power Supplies

BlackMoon PSU

ATX, BTX, Micro ATX, Mini BTX

IBM Power Supplies Continued

How to install a power supply

Standard ATX power supplies provide +3.3 volts,

+/- 5 volts , and +/-12 volts DC power. Most

modern components require +12 volts output.

Micro ATX power supplies only provide +/-12

volts. Most power supplies have the capacity to

receive both 110 and 220 volt power by toggling

a switch. U.S 110, parts of Europe 220.

(Testout.com)

Power Supplies Continued

ATX PSU, (red) toggle switch

1. Which PSU to buy?

While PC case styles can vary wildly in exterior dimensions

have to match the ATX specification. This means they have

to accept a PSU 15x9m and at least 14cm long. There of

course exceptions to the rule, first the mini-case can use

smaller micro ATX, or entirely custom-designed PSUs,

where the physical size differs from this standard as seen

here. Check before buying. (www.techradar.com)

Older power supply units blow air into the case and

cross the CPU. Current power supplies pull cool air in

from the front, where the power supply and additional

fans at the rear blow the warm air out. Power supplies

provide “soft” power, this allows the motherboard to

always have power, even when the power is turned off.

(Testout.com)

The 12 volt rail was used primarily to

operate fans and floppy disk drive motors.

The original PC PSU could deliver a

maximum 63.5 watts most of which was on

the 5 volt rail. As time passed, PCs included

bigger, faster chips which increased the load

on the 5 volt rail. As technology improved,

more devices where added, like hard disk

drives and CD-ROM drives so the 12 volt rail

had to deliver more power too.

(www.playtool.com)

Verify type of PSU required

ABT-520MA1W 520 ATX PSU

Gaming series 800w ATXeps Bronze mini ATX

Power Supplies

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