Question about Diablotek BLACK ATX CASE W/ 400W PSU (CP2036-BK) ATX Case

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Computer cases What is the main differences between the AT and ATX computer cases?

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An at case doesnt have the extra ports than an atx case has, take for instance an atx motherboard has printer port, comp port, usb and ps2 ports near the top left side, an at motherboard only has an at keyboard connector, all the other things are put in an empty isa/pci slot

Here is a picture of an AT motherboard note top right the keyboard port and the white strip behind that is a 1 row set of pins for the power as the switch is in the power supply and not on the motherboard

And This is an ATX motherboard you can see the 20pin atx power connector, because the motherboard has an electronic switch to control the power.

Posted on Dec 15, 2008


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Power supply diagram for ht 2000 motherboard

1) Uses one 24-pin ATX main power cable.

Motherboard installed in computer case, the motherboard connector for the 24-pin ATX main power cable; is to the Right of the Blue IDE (PATA) connector.
(Right side of motherboard)

General example. Note that color does NOT matter of connector,

2) Uses one 4-pin ATX +12 Volt power cable,

Motherboard installed in computer case, the whitish square 4-socket hole connector, to the Bottom/Left corner of the Processor socket; is the 4-pin ATX +12 Volt power cable's motherboard connector.

General example. Note color does NOT matter of connector,

THAT, would be considered a Power Supply diagram of the motherboard.

They are the only two power cables that plug into the motherboard.

The front of your desktop computer is the Front Panel.

The area of contact pins on the motherboard, that the Main wires from the Front Panel go to, is the Front Panel header.

Power On switch, Power On LED, (Light Emitting Diode), Harddrive activity LED, and a Reset switch IF used.


Apr 15, 2013 | ECS HP MCP61PM-HM Nettle3-GL8E 6150SE AM2...


Ensure Your Case Works with the Motherboard

The<b> motherboard</b> is an essential component of the system, but they are also manufactured in different sizes. Accordingly, it is important that you check to make sure it fits in the desired action. The good news is that all <b>motherboards</b> and cases are identified by a "<b>shape factor</b>" which is the manufacturer's sizing standards. The form factor is the most common ATX If your <b>motherboard</b> is an ATX, which tends to offer the best flexibility to choose a desktop case. After that, you will have much larger PC cases from which to choose, as most are ATX.<br />

on Dec 31, 2010 | Computers & Internet

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My computer will not turn on and i was told something is wrong with the motherboard. How do i fix this?

Your computer, Dell Dimension E521 Desktop PC, will not turn on, and someone told you the problem is the motherboard?

Unless you stated to this entity, that you spotted leaking Electrolytic Capacitors on the motherboard, how can they assume this?

I believe you should check whether the problem is the Power On switch, or the Power Supply.

1) The Power On switch is located inside the plastic Power On button. It is an ATX power on switch. (The Power On switch is a Momentary Contact Switch )

This is an example of an ATX power on switch, that I have found fits many desktop computers,

The test to perform bypasses the Power On switch. It does NOT involve the Power On switch itself, however.

Bypassing the Power On switch turns the computer (Power Supply) on?
Problem is the Power On switch.

Bypassing the Power On switch does NOT turn the computer (Power Supply) on?
The problem is the Power Supply.

A) Computer on a table, computer unplugged from power, computer case open.
I would then lay the computer on it's side, on a towel, on the table, computer case opening UP.
Watch the cables attached to the computer.

This is so you can access the components inside of the computer more easily. This will become apparent in a moment.
Now follow Anti-Static Precautions.

Anti-Static Precautions:
Your body carries Static electricity. Static WILL fry out (Short Circuit) the delicate hardware components inside a computer.
Relieve your body of Static BEFORE reaching inside the computer.

(Have to restate) Computer on a table, computer unplugged from power, computer case open.
TOUCH an unpainted surface, of the metal frame of the open computer case.
This action will relieve your body of Static.

Should you leave your computer in the middle of working on it, (For ANY reason), be SURE to touch the metal frame again upon your return.

Now you are safe, and the computer is safe. Let's begin;

Inside your computer there is a power cable coming from the Power Supply, that plugs into the motherboard. This power cable I'm referring to is the 24-pin ATX main power cable.

This is an example of a 24-pin ATX main power cable, and it's respective connector on the motherboard,

Female connector on motherboard shown in the Left photo.
Power cable connector shown in the middle photo.

The photo to the right shows the ATX main power cable plugged into the motherboard.
This is how it needs to be for the test. It also shows the color of the various wires going into it.
We only need to be concerned with Two wires.

The Green wire, and ANY Black wire.

The Green wire is the Soft Power On wire. It is also abbreviated as PS_ON.
ANY Black wire you see is a Ground wire.

A jumper wire is used to BRIEFLY connect the Green wire, to ANY Black wire.
(Again, the Power On switch is a Momentary Contact Switch)

The jumper wire preferred to use is a paper clip. The paper clip is straightened out, then bent into a U-shape.
Look at the U-shape upside down. The top/middle is wrapped a few times with black plastic electrical tape. This is for your fingers, and thumb to hold onto.

The 'legs' of the U-shape go down into the Back of the ATX main power cable's connector.
(I shortened 24-pin ATX main power cable to ATX main power cable)

Look at the photo to the right. See how the Green wire goes down into a squarish socket hole?
Look at the photo in the middle. See the metal tube shapes at the Front of the connector?
Brass looking, slightly square?

These are metal terminals. There is a metal terminal for every wire, going down into the ATX main power cable connector.

The 'leg' of the U-shape jumper wire goes down into the Back of the connector (ATX main power cable connector), RIGHT NEXT TO the existing wire that is in the socket hole.

It has to go down into the squarish socket hole far enough, to pass by the insulation of the wire, and Touch the metal terminal.

One leg of the U-shape goes down into the socket hole of the Green wire, right next to the Green wire, and touches the metal terminal.

The other leg of the U-shape goes down into a socket hole, with ANY Black wire, and touches the metal terminal pin.

The leg MUST touch the metal terminal pin.

The contact made is brief. No more than 2 seconds. (1001,..1002)

Shock warning. None.
The Soft Power On wire (Green wire) has 5 Volts DC going through it.
In comparison two D cell flashlight batteries produce 3 Volts DC.

HOWEVER, there may be a spark, as both legs of the U-shape jumper wire touch their respective metal terminals. Warning you in advance.

You are also holding onto the black plastic electrical tape. (One wrap of black plastic electrical tape will insulate you from 600 Volts DC)

IF, the jumper wire turns the computer on, (Power Supply actually), the problem is a bad Power On switch.

IF, the jumper wire does Not turn the computer on, the problem is a bad Power Supply.

The Power Supply used in a Dell Dimension E521 Desktop PC, is an ATX (Form Factor) power supply.

The form factor ATX for a Power Supply refers to the size, and shape of the Power Supply's case, and the power cables provided with the Power Supply.

The size, and shape of the ATX power supply case is approximately 6 inches Wide (Width), 5-1/2 inches Long (Length), and 3-1/2 inches Tall. (Height)

With the power cables offered with today's offering of ATX power supply's, there is no need to be concerned if the ATX power supply in question, has the needed power cables.

ATX power supply's sold now, have the correct power cables you'll need, and the correct amount of power cables.

This is just one example of an ATX power supply that will work,

Scroll down to the bold heading - Detailed Features
Look at the chart under the subheading - Connectors

Note the first connector shown. This is a 20-pin plus a 4-pin main power cable.
Both power cables are used for your 24-pin ATX main power cable connector, on your motherboard.

This gives a little more information on a 20 + 4-pin ATX main power cable,

Note the photo to the right. This particular motherboard has a 20-pin ATX main power cable connector. It does not require the additional 4-pin power cable.
Yours does.

Do Not confuse the 4-pin ATX +12 Volt power cable, with the 4-pin power cable that comes with a 20 + 4-pin ATX main power cable.

The 4-pin power cable you need is in the harness of wires, for the 20 + 4-pin ATX main power cable.

There WILL be a 4-pin ATX +12 Volt power cable, however. This is an example of a 4-pin ATX +12 Volt power cable,

(Color of the connectors for any power cable, does Not matter. They can be any color)

Dell Support > Dimension E521 Desktop PC > Service Manual,

In the list click on - Technical Overview
Now click on - System Board Components

22 is where the 24-pin ATX main power cable plugs in.

The 24-pin ATX main power cable connector, and the 4-pin ATX +12 Volt power cable connector, have a Lock on the side. The plastic rectangle on the side of the connector/s.
This Lock has a hook on the bottom end. The end that faces the motherboard.
The hook goes over a Tab on the female connector, on the motherboard.

The Lock acts like a see-saw on a playground. The top of the Lock is squeezed in. This action brings the hooked end away, from the Tab on the motherboard female connector.
Then the power cable CONNECTOR is wiggled, and removed from the female motherboard connector.

{ ONLY use the Connector when removing it. DO NOT pull on the wires)

2 points to where the 4-pin ATX +12 Volt power cable plugs in.
That's it for the Power Supply power cables.

1 points to where the Processor Fan plugs into.
5 and 6, point to where the Data cables from the SATA harddrive, and SATA optical drives, plug into.
(This is if the Dimension E521 has SATA optical drives, and not IDE { PATA} optical drives)

[ The SATA data cable connector has 7 contact pins in it. It is the shorter connector.
The SATA power cable has 15 pins in it. It is the longer connector.

IF, the SATA harddrive has a provision for using a SATA power cable, AND a 4-pin Peripheral power cable (Mislabeled as Molex), ONLY use just the SATA power cable. Otherwise the SATA harddrive will burn out. Sometimes not right away, but eventually it does ]

Going back to the main page for the Service Manual, click on -
Removing and Installing Parts.

Removing the Computer Cover is listed, as well as Power Supply.

For additional questions please post in a Comment.


Nov 03, 2011 | Dell Dimension E521 PC Desktop

1 Answer


The CoolerMaster CAC-T05-UW computer case is a Mid-Tower computer case.

It supports (Uses) power supply's that are the ATX form factor.

[Motherboards dimensions are stated as Form Factor. What Form Factor is the motherboard.
The term Form Factor is used erroneously for Power Supply's, and computer cases, ]

The ATX form factor dimensions for a Power Supply is approximately,
A) 6 inches Wide. { Width} (15.24 Centimeters)
B) 5.5 inches Long {Length} (13.97 Centimeters)
C) 3.5 inches Tall {Height} ( 8.89 Centimeters)

The ATX form factor for a power supply, also denotes what power cables are used.

A) One 20 or 24-pin ATX main power cable.
(Power supply's sold now, have an ATX main power cable that can be used as a 20-pin, or a 24-pin. You simply use, or do not use the four extra pins,

B) One 4-pin ATX +12 Volt power cable,

C) At least one SATA power cable. Better power supply's have two, or more,

D) Two, or more 4-pin standard Peripheral power cables. Better power supply's usually have four,
(Misnomered as 'Molex'. The name stuck just like Crescent wrench for an adjustable open-end wrench),

[Don't forget that if you need a certain power cable, and the Power Supply doesn't have it, you can use an adapter power cable on two 4-pin standard Peripheral power cables ]

E) 4-pin small Peripheral power cable. Used in the older computers for a Floppy Drive. Used now for a Card Reader,

I'm going to state that approximately 80 percent of personal computers out there use an ATX form factor power supply.

(The rest use a smaller size of power supply, or a different shape.
This was brought about so desktop computers could be made smaller.
Less space is needed for the computer tower in the room.

BAD design, computer manufacturers, and people who desire this.
Most personal computers are cooled by AIR, except for the gamer computers that may use Water, or Nitrogen, or refrigerant.
You need a Mid-Tower, or Full-Tower computer case, or you're going to have problems down the road)

ATX power supply's are sold everywhere.

The things you need to consider, besides what form factor for the Power Supply, is what Wattage, and how much Amp's will the 12 volt power rails handle.

A decent Power Supply now should have at least 500 Watts, and the 12 volt power rail/s should handle at least 24 Amps. (24A)

{Some Power Supply's are listed as having multiple 12 Volt power rails.
Check to see what Each 12 volt power rail listed, will handle in Amperage.
Add ALL 12 volt power rail Amp's up for a total.
This is what the 12 Volt power rail amperage will be.

I'll show an example in an added Comment}

For additional questions please post in a Comment.


Aug 10, 2011 | Cooler Master CAC-T05-UW ATX Mid-Tower...

1 Answer

How much does it cost?

Product Coolermaster Sileo 500
ATX Mid Tower Case Manufacturer Coolermaster Market Price US$70~$100

To this point Coolermaster has had a reputation for putting out cases that are either simple and utilitarian, or massive and complex. The Sileo 500 is decidedly different - it is marketed specifically as a quiet enclosure. Its name you may think is fake Italian for "silly" but it's actually Latin for "silent." Fancy, eh?

Feb 10, 2011 | Cooler Master (CAC-T05-UW) (CAC-T05-UWA)...

1 Answer

Can not get computer to power back up no lights on front o rear just little light on mother board have dell 8400

Bad Power Supply, sscorbett.

Usually you have enough power to light LED lights, (Like the harddrive activity LED light for add-in cards, that you see on the motherboard), and spin fans, but Not enough power to turn the Processor on.

Dell Support >Dimension 8400 > Service Manual

Technical Overview > System Board Components

harddrive activity light for add-in cards (SCSI LED)

The Dimension 8400 comes with an ATX style of Power Supply, that has a maximum rated Wattage of 250 Watts.
1) ALL of the LED lights combined use less than 1 Watt of power.
2) EACH fan uses 2 to 3 Watts
3) A typical Processor can use 51 to 125 Watts.

Your Power Supply just has enough power to light that LED light.
Weak voltage power rail.
Replace the Power Supply.

[ There are three power rails inside that SMPS.
Switched-Mode Power Supply.

1) The 3.3 Volt power rail
2) The 5 Volt power rail
3) The 12 Volt power rail ]

The ATX form factor for a Power Supply refers to the size, and shape of the case, for one.
Approximately 6 inches Wide, 5.5 inches Long, and 3-1/2 inches Tall.
The ATX power supply case in the Dimension 8400 however, is shorter in length.
It is 4 inches Long. (Depth)

Not an advertisement for the website, nor manufacturer.
Reference for the case size, and power cables needed,

Scroll down to see the connectors of the various power cables needed.

You may have a Power Supply with these dimensions, and needed power cables, in an unused computer.
Perhaps someone has upgraded to a better computer, and has an unused computer that you can temporarily borrow the Power Supply for a test unit.

Make sure it has at least 250 Watts (Maximum rated wattage), plus,

1) 20-pin ATX main power cable. (Or a 20 + 4-pin ATX main power cable)

[ 20 + 4-pin ATX main power cable, ]

2) 4-pin ATX +12 Volt power cable

Plus the various power cables needed for the Harddrive, optical drive/s, and computer case fan/s, if it/they do not connect to the motherboard.

Oct 21, 2010 | Dell Dimension 8400 power supply ** FREE...

2 Answers

I have a Ultra M923 Full Tower ATX Case ATX and the lcd screen doesn't work, is there anything i can do to fix it?

@ PaulMo..
You need to research the question and product at hand before posting a solution, Flyner1990 was referring to the LCD panel on the Ultra M923 Full tower case and not a monitor or video card.
The Ultra M923 has known issues with the front LCD panel, either they work or they dont. They are not accurate either.. Solution is either replace the case with something else or disconnect the LCD panel's sensor's and purchase another fan controller. I too own this case and love the design but having issues with the front panel as well and my fix was installing another fan controller/monitor..

Feb 22, 2010 | Ultra Products Ultra M923 Full Tower ATX...

3 Answers

What is Mini Tower ATX Cabinet

A mini tower is a PC desktop case which is approx half the height of a full size desktop tower case. ATX probably refers to a ATX switch mode power supply.

Sep 10, 2009 | ASUS TM-220 (generic) Micro ATX Mini Tower...

1 Answer

I have an old e machine 500 (origional operating system was windows 98). I am replacing the ATX switching power supply , 230 wat, model lp6100a. My problem is connecting it. I know all the connectors...

The old AT power supply that these old computers uses has two six pin socket connectors and these are different to the ATX connector.
You cannot buy these power supply now, most likely you might find one/computer in a junk shop.
If you have electronic knowledge you might be able to cut off the connectors from the old power supply and connect it to the ATX power supply and modify the ATX power supply so you can switch on the power to the old computer. The old AT power supply uses a mains power switch whereas the ATX uses low voltage to turn on the power supply.
Good luck & have fun.

Nov 29, 2008 | Powmax 400 Watt ATX Switching Power Supply...

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