Question about HP Pavilion a800n (PP163AA) PC Desktop

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Case ATX compatible?

I do charity work and want to replace the motherboard in an HP Pavilion a800n for more processing power. Is the case ATX compatible?

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Re: Case ATX compatible? - HP Pavilion a800n (PP163AA) PC Desktop PC Desktops

Yes, it is

Posted on Jan 16, 2008

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I have an Hp m260n. I just need to find out what type of case it has (ATX or uATX).

Motherboard: ASUS P4SD Motherboard Specifications

Board Form Factor: uATX

uATX stands for Micro-ATX,

HOWEVER, the Power Supply is an ATX form factor,

,of a sort.

Form Factor related directly to desktop computer Motherboards.
Now has 'evolved' to relate to the computer case, and Power Supply.

When referring to a Power Supply, and the ATX form factor; you are not only referring to the size, and shape of the Power Supply's case; but also the type of power cables used, and the technology used within.

Size and shape of an ATX power supply is approximately;

6 Inches Wide, 5.5 Inches Long, and 3.5 Inches in Height.
(152.39mm Wide, 139.69mm Long, and 88.89mm in Height)

Power cables included with Power Supply's nowadays, will include all the power cables you'll need, with probably some left over.

HOWEVER, looking at the 'ATX' form factor designated for your computer, to wit from the ad above, it does NOT fit the above size, and shape.

More like 6 Inches Wide, 4 Inches Long, and 3.5 Inches in Height.
Looks like they just crammed everything into one small box.

Remove motherboard, and all internal hardware, into a new computer case?
No prob!

Most Mid-Tower to Full Tower size computer cases, will have a Support Plate that accommodates a Micro-ATX form factor motherboard, OR an ATX form factor motherboard.

Just look at the Support Plate mounting holes.
Ones for a Micro-ATX (uATX) motherboard, will have uATX next to them, or MATX, or mATX.

Ones for an ATX motherboard, will have ATX next to them.

However check the computer case manufacturer info to be sure.

[ The motherboard mounts to a Support Plate.
The Support Plate can be an integral part of the metal frame, of the computer case; or a separate metal plate that attaches to the computer case metal frame ]

Not what you had in mind Joel? Post back in a Comment.


Feb 17, 2013 | HP Media Center PC M260n (DF200A#ABA) PC...

1 Answer

Hp pavilion slimline s5000 series whats the highest graphics card i can put in it

There are 14 different versions in the s5000 series of slimline desktop computers,
{From s5200z to the s5285t}

Some are Intel processor based, some are AMD processor based.
The Power Supply wattage differs also. Seems it goes from 220 Watts to 300 Watts.

All versions have a PCI-Express x16 expansion slot, though.

[ It is based on the PCI-Express 1.1 version technology
A graphics card based on the PCI-Express 2.0 technology will work.

Because PCI-Express 2.0 is backward compatible with PCI-Express 1.1

"PCIe 2.0 motherboard slots are fully backward compatible with PCIe v1.x cards. PCIe 2.0 cards are also generally backward compatible with PCIe 1.x motherboards, using the available bandwidth of PCI Express 1.1. Overall, graphic cards or motherboards designed for v2.0 will work with the other being v1.1 or v1.0."

1) Motherboards based on the PCI-Express 2.0 technology, are compatible with a PCI-Express graphics card that is based on the older PCI-Express 1.1 technology.

2) PCI-Express graphics cards are also generally compatible, if they operate at the smaller bandwidth of PCI-Express 1.1

Since the slower technology of PCI-Express 1.1 is what is available on your motherboard, a graphics card based on PCI-Express 2.0 will not operate at full capability.

{Graphics cards based on the new PCI-Express 2.1 technology will work also }

Will you notice?
No ]

What is the limit for a graphics card?
The sky.

Two problems though.
A) The Power Supply
B) The available room inside the computer case for a graphics card.

1) Power Supply:
According to HP Support, and looking at the specifications for the s5200z, and s5285t, the top of the line graphics card is an Nvidia GT220.

This is due to the low power consumption. (And probably reduced cost from Nvidia)

Based on price, and performance however, the GT220 is a less than choice.

Using a Zotac version as an example,

Stream Processors = 48

You can have the fastest Core Clock, and Memory Clock, plus all kinds of graphics ram memory, but if you do not have enough Stream Processors, your graphics card will be less than adequate.

Consider Stream Processors as the 'Information Highway'. The path that graphics information takes from the Processor to the Graphics Card, and back.

If you do not have enough stream processors it's like a road being worked on.
Traffic is redirected into just one lane. Everything slows down.
There is a 'Bottleneck'.

Most decent graphics cards that are better than a GT220, require a Power Supply with 400 Watts, or greater.
The size and shape of the Power Supply's case, makes it hard to find a replacement that is greater than 300 Watts.

2) Available room for a graphics card (Height) inside the computer case:

With the Slimline case you have to purchase graphics cards that are Low-Profile.
{Low Height}

It isn't so much the length that you need to be concerned with, as it is the height of the graphics card.
The length of a graphics card goes from the back of the computer towards the front.
The height of a graphics card goes from side to side inside the computer case.

Average width inside a Slimline case seems to be around 4 inches.

You have to take into consideration; how far the motherboard is supported off of the support plate inside the computer case, and when inserted how high does the graphics card sit in the PCI-Express x16 expansion slot.
4 inches is Not enough room.

If it were I, I would remove all internal components, and install them in a cheap, decent, Mid-tower computer case. There is more room inside the case for a taller graphics card, and the case will use the common ATX style of Power Supply. A 600 Watt ATX power supply is pretty economical.

{There is also more room inside for air flow. Air is the cooling medium for a desktop computer. (Unless it's a high-end gamer computer. Dry Ice, Nitrogen, Refrigerant etc. have been used )

More air flow means cooler hardware components inside the computer.
Result? Longer life, more reliable }

Then I would use an ATI Radeon HD 5750 graphics card, (And a decent 600 Watt power supply)

{A decent mid-tower computer case averages around $50 }


Sep 11, 2011 | HP PC Desktops

1 Answer

Why is my hp pavilion 523w not working it just makes enough power to make a green light flash

The Green LED light you see flashing indicates you have a bad Power Supply.

Computer unplugged from power, computer on a table, computer case open, observe Anti-Static Precautions.
Clean the inside of the computer out with a can of compressed air for computers, (Or may take two, and a few Q-tips), and replace the Power Supply.

Supporting data:

HP Support > Pavilion 523w desktop computer > Main support page,

Click on > Solve a problem > Start Up/Shutdown/ Power > Power Management

Click on the + sign to the left of > Power supply light is on or flashes

Replacing a Power Supply,



The Power Supply is an ATX form factor. The ATX style of Power Supply is found in over 80 percent of personal computers out there, and is readily available everywhere.

It's a 250 to 300 Watt power supply.
Probably made by Bestec, HiPro, or Delta, or some other generic power supply manufacturer of low quality power supply's.

Has a 20-pin ATX main power cable, and a 4-pin ATX +12 volt power cable.
Plus the usual amount of 4-pin Peripheral power cables, and a Floppy Disk power cable.

Scroll down to the illustration and photo of the Motherboard.

Typical 20-pin ATX main power cable,

Typical 4-pin +12 Volt power cable,

Nov 15, 2010 | HP PC Desktops

1 Answer

Why does my computer shut off by itself? it is a hp pavilion a305 pc desktop. we tried cleaning all the dust out but it didn't help

HP skimps on powers supplies which causes them to run at near-capacity and eventually fail. That case should accept a standard ATX supply but if buying on eBay (suggested-lots cheaper) check with seller for compatibility. Do NOT replace the old supply with the same power rating; choose one with 50% or greater capacity; i.e. replace 250W with 350-400W. It won't cost hardly any premium or use more power, just run under less stress.

Oct 31, 2010 | HP Pavilion a305w (DM181AR) PC Desktop

1 Answer

My computer just stoped working. It wont power on and when I hold the power button there is just a blue flashing light

Bad Power Supply.
Weak Voltage power rail.

The Pavilion a6000n desktop computer uses an ATX style of power supply, and is rated at 300 Watts.
(Probably made by Delta Electronics)

The ATX style of Power Supply is used in over 85 percent of PC's. Very common unit.

[Case size is approximately 6 inches Long, 6 inches Wide, and 3-1/2 inches Tall ]

What you are looking for is an ATX power supply with at Least 300 Watts, and the correct power cables.

Note that a computer only uses the power it needs, and No more.

Wouldn't matter if you had a 10,000 Watt Power Supply, (Exaggeration), and the computer only needed 100 Watts, it will only use 100 Watts.

(Surfing the internet typically uses 100 Watts.
Computer. Monitor uses it's own power, and is separate from this figure)

This is HP Support > Pavilion a6000n desktop computer > Specifications,

This is HP Support > Pavilion a6000 desktop computer > Motherboard Specifications,

1) Scrolling down the page, and looking at the photo of the motherboard, you can tell the Power Supply must have a 24-pin ATX main power cable.

To the right of the Blue, and Black ram memory slots is the 24-pin ATX main power cable connector, on the motherboard.

It is White in color, and consists of 2 rows of 12 socket holes.
24 total.

On the illustration it is marked as - ATXPOWER.

This is a closer look at a typical 24-pin ATX main power cable, and it's respective connector,

Note the Lock on the side of the connector. The Lock is hinged in the middle, (Plastic), and operates like a see-saw on a playground.

Squeeze the top of the Lock in to remove the 24-pin ATX main power cable.
ONLY gently pull up on the connector, and NOT the wires.

[This action brings the hooked end of the Lock away from a 'Bump', or protrusion, that is present on the female connector, on the motherboard ]

2) The Power Supply must also have a 4-pin ATX +12 Volt power cable.

On the illustration where it states Socket AM2 is the Processor socket.

To the left, and down a little of the Processor socket, is a blank square.
The writing under it is illegible.

This is where the 4-pin ATX +12 Volt power cable plugs in.

On the motherboard photo it is to the left of the white Processor socket, and is square in shape, with four socket holes.

This is a better look at a 4-pin ATX +12 Volt power cable, and it's respective connector,

Color of the plastic used in the connectors, does not matter.

3) Looking at the Specifications page, you will see that the Power Supply must have at least 1 SATA power cable.
It's used for the 250GB SATA harddrive.

Closer look at a SATA power cable, and it's respective connector,

If the SATA harddrive in your computer has a place for a SATA power cable, and a 4-pin Peripheral power cable, ONLY use the SATA power cable.
DO NOT use both.

4) Again looking at the Specifications page, the Power Supply must have at least two, 4-pin Peripheral power cables.
Used for the optical drives.
(DVD drives)

A closer look at a 4-pin Peripheral power cable, and it's respective connector,

There may be more 4-pin Peripheral power cables needed, to run any computer case fans.

[The Processor fan plugs into the motherboard ]

An example of an ATX power supply that is 500 Watt rated, and has the correct amount of power cables, plus the correct type of power cables,

Jun 21, 2010 | HP Pavilion a6000n (882780985018) PC...

1 Answer

I would like to move it in to a bigger case

When looking at the specifications of the HP Compaq DC7700 SFF Desktop PC, all they state is the motherboard form factor is, 'Custom'.

Same thing for the DC7700 USDT Desktop PC.
Both of these desktop computers are of the 'Pizza Box' design.
(Flat rectangular box)

The DC7700 CMT model is a tower model, and the motherboard form factor for it is uATX.
uATX can also mean Micro-ATX.

The form factor of a Micro-ATX motherboard is 244mm by 244mm, or also said as 9.6 inches by 9.6 inches.
(9.6 inches is approximately 9 and 9/16ths inches)

To regress for a moment, and explain the term Form Factor.
This term is supposed to apply only to motherboards, but has gone on to apply to computer cases, and power supply's.

Form factor means the dimensions of the motherboard, and also where the I/O area is located.

[I/O = Input/Output
Area for the Input/Output devices that are attached to the computer.
Examples: Mouse, Keyboard and Monitor]

Whether the motherboard is installed onto the Left side of the computer case, and the I/O area is on the Left side also (ATX , Micro-ATX, and uATX form factor),
whether the motherboard is installed on the Right side of the computer case, and the I/O area is on the Right side also. (BTX)

Dimension sizes:
ATX is 305mm x 244mm. (12 inches by 9.6 inches)
Micro-ATX is 244mm x 244mm (9.6 inches by 9.6 inches)

Above the link is the Maximum size for the Micro-ATX form factor.
It can also be the Minimum size of 171.45mm x 171.45mm

(Or 6.75 inches by 6.75 inches.
6.75 inches = 6 and 3/4 inches)

Point of all this?
The motherboard form factor inside a DC7700 SFF is probably a uATX form factor, and is 6.75 inches by 6.75 inches.
Or some variation thereof.
It's a custom size.

This means good luck in finding a computer case you can buy off of the shelf, and is large enough to install an ATX power supply.

You can get a custom one made, and you're probably looking at $150 to $200.

Or, you can modify one of these computer cases VERY easily,


The above is an Acyrlic plastic computer case. It's approximately 1/4 inch thick for the case walls, bottom, and top.

VERY sturdy.

It has metal Standoff's that are set up for an ATX motherboard.

It should have holes in the case where a Micro-ATX motherboard can be mounted, by unscrewing the Standoffs, and screwing them into the Micro-ATX holes.

[A Standoff is a piece of metal that is hex shaped, and has a threaded hole in one end, and a threaded end on the other side ]

If there isn't the proper holes for mounting your motherboard, you make the holes.
The case is plastic.

Uses an ATX power supply.
The cost of the case is $50

Mar 08, 2010 | HP RT810UTABA - HP dc7700 small form...

2 Answers

I need a new motherboard for my computer. currently it has a ASUS PTGD-LA motherboard. does it matter what kind i replace it with?? I have an hp pavilion a1020n desktop

Information about the stock motherboard is here if you want to compare it to possible replacements. It doesn't matter what board you get as long as it fits (micro-ATX style) and can support the drives you have (enough IDE and SATA connectors). Also, if you want to keep your current memory and processor, you'll need to find a replacement that supports them. Finally you need to make sure that you stay within the ratings of the system power supply, unless you plan to upgrade it.

Hope this helps. Thanks for using Fixya!

Mar 04, 2010 | HP Pavilion a1020n (PS583AA) PC Desktop

1 Answer

Power turns on then immediately off

The case shouldn't have anything to do with power getting to the motherboard. Though there should be a switch on the power supply to increase or decrease the voltage move the switch to the other position and see if the machine stays on.

Apr 26, 2009 | HP Pavilion a1630n PC Desktop

1 Answer

ATX power supply compatible with my EVO D500 Motherboard


If your motherboard is wtx connection , pretty sure that there are 2 ports in it. the 24 pins and the 22pin. so maybe you need a WTX power supply which is availbale today. this is tha example (

maybe you can find a PSU for your stuff in that link.

may this help,


Feb 15, 2009 | PC Desktops

1 Answer

My computer keeps freezing

assuming that you are having a Pentium 4 machine

rotate the 4 screws on the side of the CPU fan and pull each one out. then plug out the power supply wire of the fan. take your new fan and plug its wire into the same pins and fix it at the same place (fixing it on the motherboard and screwing it ).

Before powering the machine ON make sure that you have fixed the fan rightly else you may make your processor as well as Motherboard ueless.

Please rate the solution

Jan 01, 2009 | HP Pavilion a800n (PP163AA) PC Desktop

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