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Hi as i am new to this site i am unawre of the protocols, so Hello everybody i ahve been given a 478 mobo which is a 478:- N4-IBFGL V1.3(GV the only trouble is there is no fan housing for the fan to fit in, i thougt i would try a 478 fan housin that i have and it doesnot fit the hols on the mobo are a lot smaller apart than a standard 478. I am having trouble locating one. I would be very greatful if you could point me in the right direction for one Many thnkas for your help All the best Simshi

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You need to get a p4 fan with the 4 tabs to put on that bad boy:

Posted on Sep 15, 2007

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Is this your board?

Posted on Sep 15, 2007

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Is ABIT SG-71 a Pentium 4 motherboard and what are the specs, the does and donts

The ABIT SG-71 is an Intel Socket 478 that could take a Pentium 4 or Celeron CPU (533/400MHz) designed for the 478 socket. It could support up to 2 GB of DDR 333 memory.

This motherboard may not be worth putting in a new CPU; it is over 10 year old technology. It's very old and slow compared to even two year old CPU and motherboard options.

Cindy Wells
(if you do want to replace the CPU, remove the old hardware. Use extreme care not to bend any pins on the CPU. Add new thermal paste to the top of the CPU and then put on the heatsink. Connect the CPU fan to the CPU fan header.)

May 05, 2012 | ASUS PC Desktops

1 Answer

My monitor is not booting up but powered up, what is the problem? the fan is real loud but nothing else works

I see this is your second posting. Good for you in adding the additional information.
This may be rather lengthy genevacotton, so grab something to drink, and sit back.

The cooling system for a desktop computer consists of air flow through the computer case.
Air is brought in from the Front towards the Back of the computer. (Or for some gamer computers, through the top, or side, and out of the back)

Air helps to cool the hardware components inside the computer.
A Processor is one of the two main components to develop the most heat.

[ Below shows a typical Intel Pentium 4 processor. Operates at a maximum frequency rate, ('Speed') of 3.0GigaHertz,

Under the bold black heading > Intel Pentium 4 3.0GHz RK80546PG0801M ( BX80546PG3000E),
look at the tabs >
Specifications, Pictures (3), CPU ID, and Comments (0)

Click on > Pictures (5)

You can click on any of the photos to enlarge.

The photos show the top view of a Processor.
The silvery looking square case in the middle is the Processor chipset.
The Green square surrounding it is a circuit board.

Click on the third photo down. The one under 2008-10-05 14:56:45

Holding that circuit board up off of that flat black surface, are pins. These you do not see in the photo.
For this particular Intel Pentium 4, there are 478 pins.
This Processor fits in a Socket 478 processor socket.

The photo shows the top of the Processor's case, with No Heatsink sitting on it.

This is a typical Heatsink/Fan combo,

The Heatsink is the aluminum looking square object under the fan.
Your particular desktop computer may not use a fan on top of the Heatsink.

It may have a Fan in the front which draws air through a plastic tuned port.
The plastic tuned port in turn, then goes over the Heatsink sitting on top of the Processor.

Case in point with all of the above prattle?

The Thermal Paste used in-between the top of the Processor's case, and the bottom of the Heatsink, has dried up.

The top of a Processor's case, and the bottom of a Heatsink, are not perfectly smooth.
A microscopic view would reveal 'Pits, Hills, and Valleys'.
When the two surfaces of the Heatsink's bottom, and the Processor's top are put together, the before mentioned imperfections create Air Pockets.

AIR is an Insulator. Not a Conductor.
Thermal Paste is a Conductor. It conducts heat from the top of the Processor's case to the bottom of the Heatsink. and fills in the imperfections.

When thermal paste dries up it looses it's conducive properties.

The fans are designed to spin at an RPM, (Revolutions Per Minute), that is in compliance with the needed cooling for the Processor.
Processor isn't running very hard, fan/s spin at normal speed, (RPM)

Processor is running hard from multiple programs running, or intense games, the Processor heats up, and the fan/s spin faster.

Whenever the Processor heats up past it's thermal limit, (Maximum operating temperature), the fan/s spin faster.
If the Thermal Paste is dried up, the Heatsink, and Fan cannot cool the Processor properly.
The signal is given to the fan/s to speed up, but they still cannot cool the Processor.

The Processor overheats, and shuts off. The fans still spin at max RPM.
No computer operating, fan/s spinning at high RPM.

Nov 15, 2010 | PC Desktops

2 Answers

I have a gateway gt5662 given to me from a friend who was going to trash it. Got it home and plugged it up and the started on its own. No lights are on the MoBo. and the and some of the fans work and...

If it was the CPU it should still give you some sort of beep or diagnostic code.
On the back of the power supply there is some times a little light, when you power up if there is an issue with the power supply it will blink or change colors. Some times the power supply testers will light up green but there still can be issues and you need to use a voltage meter to do a more advanced test.
Have you tried removing any extra hardware and then trying the boot?

Apr 13, 2010 | Gateway GT5662 Desktop PC

1 Answer

Need to find a new alum&copper heatsink and fan combo

This is a standard micro atx board. The holes you are seeing will be on any 478 mobo, you just have to remove the black bracket, which is usually achieved by lifting the center pin in each of the corners.

Sep 02, 2009 | HP COMPAQ BUSINESS DESKTOP DC5000 SFF - 1...

2 Answers

Can this be saved?

Check that the memory be the right one.
Check that the memory module be sitted correctly into slot
Check your video card (be sitted and configured correctly in your bios)
Check the monitor cables and VGA connector at the back of your computer
Check your CPU (be sitted correctly)
Check your power supply.

If still the problem continues need to replace your motherboard.
Take the motherboard number and model written on the board
With this number you can find your replace.

You can also repair your motherboard

But usually is better to get a new computer instead of repair an old one due the cost or time required to get the parts.

Hope this helps

Have a great day!
Pablo :-)

Oct 24, 2008 | HP Pavilion A642n (PE544A) PC Desktop

1 Answer

The cpu heatsink clip has come apart, would like to know how to fix. the model is hp pavilion

That's what usually breaks if you have a 478 pin cpu. Should be available in any computer shop. If the actual metal bracket on the heatsink broke you will have to buy a new fan/heatsink. Both solutions are cheap.

Apr 24, 2008 | PC Desktops

13 Answers

Dimension 8400 will not boot, very loud fan.

I have a small business where I have worked on PCs for the past 14 years. I have had some of my clients that have brought me a few of these Dell 8400 to work on with the same problem. Will not boot and loop the start up, along with sounding like a leaf blower. After much trial and error i.e. Heat sink,cooling fan, power supply and motherboards. The first one I worked with by changing the heat sink, worked for about a week, then started doing the same thing. Replaced the Power supply with no results, same issue. Next was the Motherboard, still same issue. Last I pulled the processor out and found that the processor had over-heated and was damaged. In all I had well over $500.00 dollars invested and countless hours. Still the machine did not work, and still needed more work. Since this time I have had a few more of these machines cross my path. My suggestion is to scrap it and purchase a new PC. This is not one of Dell's better designs, and there is a tech issue from Dell related to this problem with the heatsink and the machine itself in the tech support on the Dell site. It states that they had a bad batch of heatsinks, but only replaced them under warranty.
Salvage what you can and build or have someone build you a clone.

Apr 04, 2008 | Dell Dimension 8400 PC Desktop

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