Question about Foxconn 45CMX socket LGA775 motherboard (16897)

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Chip set can i replace a heat sink on the chip set

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Generally yes. But if Foxconn glued the heatsink on, then it is problematic at best.

Usually the chipset heatsinks are not glued but do use some type of thermal tape or paste that transfers heat to the heatsink. There are typically two plastic inserts or screws that go from the heatsink THRU the motherboard and come out on the other side. This will require you to remove the motherboard form the PC case to do this mod.

You remove the heatsink, clean up the contact area with 90+% isopropyl alchohol with a lint-free cloth until the original goo is removed. Put a small amount of your new thermal paste such as Arctic Silver 5 (AS5) (about the size of a grain of rice) and spread it even over the chip's contact area with a credit card edge or other straight plastic edge tool. Using a baggie over your finger, smear a very thin coating of AS5 (or other) onto the bottom of the new heatsink. Put it all back together again and you should be good to go.

Posted on Jan 27, 2009

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You do need much. Just cover the heat sink with a thin layer of thermal paste, the excess paste will squeeze out when you clip the heat sink over the CPU so do not put too much paste on.

Mar 07, 2013 | ASUS Computers & Internet

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Intel Motherboard DG31PR overheat Problem it start at 68'c & goupto 75'c system is very slow cpu temperature range from 45-52'c

hi..hope ur a pro b4 handling core hardware components like cpu..
well d prob u described can b any one of d following:
i) the cpu fan- a) can be dirty..clean throughly..
b) look if any of the clips mounted into d main board is damaged..
c) try replacing d whole fan..
ii) the heat sink- may b dirty too..clean using a blower
iii) heat sink compund- ie a white paste rendered with a thin film between d cpu n d heat is seemed to b dried up..clean it using a cloth n re-apply it (available in chip-level spare market)
n.b.: b very careful b4 opening cpu fan n cpu from itz socket..
iv) open cmos utility or bios setup n in temperature settings ignore or disable cpu warning temperature..
v) c if all d electrolytic capacitors (mfd) situated in d north bridge of d main board r ok or not..
vi) download n install any cpu temperature control or cpu cooler software (dis softwares increases d fan speed as n when necessary)..
vii) if all d above fails try replacing d smps (atleast 450w)..

bt itz always better to seek intervention of ur computer supervisior or a pro..
n plz do vote n rate..

Dec 29, 2010 | Intel DG31PR Motherboard

2 Answers

How to find my motherboard type and model number

If you do not have OS yet,...
1. Try to open the CMOS Setup, it is by using delete, F2 or the bios provided key that shows in boot, you will see some information there.

2. Try to open the case, using screw driver, and flash light, you will see the brand name on top of some IC heat zinc (video ic) at the center, the model is usually besides processor..

Nov 30, 2010 | Intel PENTIUM-4 865GV CHIP MOTHER BOARD...

2 Answers

I have the Presario F700. it wont turn on.

HP really messed up with some series of laptops that use amd processors and nvidia chipsets like the F500 and F700, in latin america, where I live, they never provided a solution and in the US, Canada and other countries a product call back was made but not all the users were informed and it's no longer in effect, so what you can do is repair your laptop, I'll tell you how.

You will need:
-presario F700 service manual (google it, you'll find it easily)
-heat gun or hair dryer
-a penny
-thermal silicone grease

I know it sounds like something MacGyver would do, but it helped me with several presarios F500 that wouldnt turn on. I'll explain a little so you can see why this actually works. The computer will stop turning on, in some cases wi-fi will absolutely die before,when the computer overheats, to be precise, the nvidia video chip overheats the soldering that holds it in place, when contact is lost the problem appears. So what you need to do is simple, first you need to "re-solder" the chipset, then you need to improve the system to prevent the chip from overheating, thats when the penny is used, as it is made of copper (or so I was told, I'm not american so I couldn't say for sure) it will act as a heat sink for the video chip, copper has great thermal properties.

First thing first, you'll need to follow the instructions on the service manual to dismount the fan/heat sink assembly, be really carefull not to misplace any screw or you'll have a hard time putting all back together. There is a part of the service manual that will require you to dismount the display,carefull, the complete instructions regarding that part will lead you to disassemble completely the display, my advice is, once you remove the screws that hold the display to the rest of the computer you can continue with the top cover (where the touchpad is located).

Once you have the motherboard out, identify and remove the processor as well, the fun begins now, using your heat gun or hair dryer heat the nvidia video chip, thats the one by the processor not the one by the wi-fi card, if you use a heat gun heat it for about 2 minutes you wont need more than that, try to direct the heat only to the nvidia chip, you dont want to de-solder any other components, you can cover the rest of the motherboard with magazines, that helps a little, if you are using the hair dryer make a cardboard cone to redirect the heat to the chip, you'll need to heat it from 10 to 15 minutes depending on your hair dryer, make sure to hold the heat gun or hair dryer at least 4 inches away from the chip, dont apply heat directly.

Once you are done heating the chip, you'll need to press it firmly to put it in place again, you wont feel the difference but simply do it, dont do it with your fingers or you'll burn them, that should do the trick, your computer is now fixed, however if you put it back together just like that it will fail again soon, so we need to improve the heat sink for the video chip.

You need to use the thermal silicone on both sides of the penny, then put the penny over the video chip, as centered as possible and then put the heat sink back on, off course you need to put the processor back on before putting the heat sink back, there is an optional thing to do before putting all the rest back together, you can drill some holes on the base enclosure right where the video chip is located, that will improve ventilation, then follow the instructions to put all back together, after that you can try to turn your computer on and see it turning on like it used to.

This has worked for me several times, I hope it works for you as well, one last advice, update your bios to latest version and get a cooling pad to prevent as much as you can the overheating issue, good luck.

May 13, 2010 | HP Compaq Presario F500 F700 and G6000...

1 Answer


Hi there!
AMDs (some of them) have Overheating issues. Your default BIOS is set to protect the CPU chip in case of overheating. It will do so by shutting down the computer.
You can hold "delete" key on boot to enter BIOS. Go to "PC Health Status" or " Hardware monitor". Here if you see temperature exceeding 60 degrees or more, this mean it's OVERHEATING!
Now the first thing is to check if your CPU fan is running & is well secured with the lock. Try to move it to see if it's loose. Secure it properly to solve. If it's not running, you'll need to replace.
However if it's not the problem, remove the fan & its aluminum heat-sink with CARE. Then re-seat the heat-sink properly.
Note that a poor contact of CPU & heat-sink = Very Hot CPU & cold heat-sink.
If it's not the case, therefore remove the heat-sink & clean the old thermal paste on it & the Cpu chip also.
Apply proper thermal grease e'g Arctic Silver.
If the above does not solve the issue, you'll need to replace fan. (pls check with another one before buying a new one if possible)
Ultimately if the issue is not solved by the above, this means that the heat sensor on the motherboard is faulty. Here motherboard needs replacement or warranty services.
Hope this advice really helps you. Please remember to send us your valuable feedback as it's very important for us!

Mar 05, 2010 | Biostar NF61S MICRO AM2 SE...

1 Answer

Intel orignal motherboard has to be ded how can solve that proble

u must untie ur mother board from ur cabinet now u must use paper rings both side of ur motherboard where u can screw the motherboard . i think that motherboard is using extra ground. otherwise u must check heatsink of green chip it may be loose or without heat sink compound plzzz untie heat sink and use heat sink compound on green chip now retie the heat sink . enjoy and good luck

Jul 28, 2009 | EliteGroup ECS A780GM-A Motherboard - AMD...

1 Answer

Please tell me settings jumpers about this mb 227498-001-socket 478, sdram, cpu p4, thank you for help!

The truth is that I cannot give, not even an idea of how to set the jumpers. The way that the manifacturer gives orders to his employees is a well kept secret. The way that the jumpers are set is to give a very precise voltage to the CPU chip. Tha danger that everybody is worried about is that a vey small rise in the voltage, for instance going from 1.8 to 1.9 volts, may cause that much of an increase in the current through the chip that the temperature may increaseenough to destroy the chip. The voltage for the CPU chip is adjusted for a pre-set frequency and at that frequency the heat generated in the CPU chip is calculated to be dissipated through the heat sink, which may even have a blower. Increasing the frequency of a CPU than what the manufacturer intended is called "overclocking" and up until now it has the hobby of some amateurs, who experimented and actually have had good results. But look at the sequence: the voltage on the CPU is raised slowly, watching the temperature of the chip, not to exceed the point of no return. Once the heat sink is unable to maintain the safe temp., the system is dismantled and a new heat sink perhaps with a more efficient blower, will place the chip within its thermal limits. If your CPU has not burned out already ask the manufacturer of the mother board for information and get figures that will help you to increase the frequency and still, up to a point, avoid the destruction of the chip. As a point of information Compaq never has manufactured any mother boards. They specify them to their favorite supplier and he delivers the quantity they need. The same holds true with the mother company HP. Tell me if you are out of business with your computer and I can do an inquiry and there is the chance that we get some onfirmation. One alternative, not very cheap, is to buy a MB that has a provision for gaming and has adjustments and control of the heat dissipated by the CPU chip. I desire to help all I can that we can have your computer running, under the limitations said above.
We tahnk you very much for considering our service...
My name is Constantin (arzconst)

May 16, 2009 | Compaq ( 277498-001) Motherboard

3 Answers

K8S-LA mobo heat sink fell off.

That is the 'Northbridge' chip that provides the I/O interfacing for the main chip. The heat sink is normally held on with glue as you surmised, and should be re-done with a thermal conductive glue. The glue (a silver filled epoxy) is available from MCM electronics or from Mouser. Be sure to thoroughly clean the chip and heat sink before re-gluing.

Sep 01, 2008 | ASUS K8S-MX SIS 760GX CHIPSET SERIAL...

3 Answers

P4P800 SE vs P4P800 Mx

The general answer is yes.

1) Both of these boards have the same CPU socket:
"Intel Socket 478", so they are CPU compatible
at the pin level.

The different support chip-sets (North and South bridge)
do provide different I/O features and bus optimizations,
but this is NOT a problem to the CPU, nor an issue to
worry about.

2) Also, both these boards are smart enough
in the BIOS, to automatically detect the CPU
and to automatically set the clock speeds and
power supply voltages.

The P4P800 board is more then fast enough to take full
advantage of the 2.4 GHz CPU.

The only time you could get into trouble is if you
override the BIOS settings to over-clock or over-voltage
the CPU or memory, without knowing what you are doing.

3) If you are not sure, just let the BIOS do its thing, and auto
set the CPU and memory settings.

However ! ...

4) Be extremely careful when physically swapping the CPU's
and heat sinks:

a) Make sure the computer is physically unplugged,
and the power has been off for a few minutes.

b) Unclip the whole fan/heat-sink assembly as a unit if
you can, and wash the bottom of the heat-sink with
rubbing alcohol to remove the "white gunk"
(heat-sink transfer compound)

Similarly clean off the CPU's after you remove them from
the socket, do NOT drip alcohol onto the mother-board,
because it could dissolve, soften or contaminate it.

The alcohol will NOT hurt the metal heat-sink, nor the
ceramic top of the CPU.

c) To remove the CPU from the socket (and to replace it)
release the socket lever on the socket FIRST.

The CPU should slide in and out of the socket without
ANY force what so ever, and make sure that PIN-1
and the shamfered corner are oriented correctly !!!

If you plug in the CPU the wrong way, and power it up,
it is GAME OVER !!!

d) Take extreme care not to STATIC zap the mother board,
or the CPU. Wrap a thin bare wire around your wrist,
and connect the other end to the computer case,
before handling ANY electronic parts.

(With the computer still turned off and unplugged :)

This is EXTREMELY important, because your body
can accumulate a very small charge at a very high
voltage of several thousand volts before you even feel
a tingle, and when discharged can fry or injure every
chip on the board.

do NOT remove the mother board from the box just
to change the chip, if you can possibly avoid it.
Handling motherboards is ALWAYS risky due to
the risk of static as well as flexing the board and
braking internal "plate-through-hole" connections.

I am an expert many times over so please take my
word for it.

5) After you install the new CPU in its socket, but BEFORE
you re-attach the heat-sink, you need to apply a liberal
amount of NEW white heat-sink compound between the
heat sink and the CPU.

This white goo is a silicon based grease that drastically
improves the heat transfer from CPU to heat sink, i.e.
lowers the thermal resistance in degrees per Watt,
to keep the CPU from overheating.

Many people skip this important step, but if your CPU
overheats, it won;t last long.

The heat-sink compound is available from any electronic
or computer shop.

6) Make sure that you clean and reconnect the CPU fan,
and check that it is working properly.

7) Make sure that your power supply is strong enough to
provide the additional current required by a faster CPU.

Keep in mind, that the amount of power consumed, and
heat generated by the CPU is directly proportional to
frequency and to the square of the operating voltage.

Also, faster CPU's never last as long as slower ones,
due to increased nano-scale current densities and
atomic scale erosion due to these currents. Although
the currents are miniscule from our point of view, so are
the circuit geometries, and if you do the math, (I have)
the effect of sending some of these internal currents
through the nanometer-sized conductors is like forcing
the Mississippi river through a half inch pipe.

The sheer momentum of the electrons is sufficient to
knock whole atoms out place and slowly erode the
tiny semiconductor structures.

All chips WILL fail in time. The faster they run the sooner
they fail, but hopefully "after" they become obsolete.

8) So make sure you have enough fans to keep things cool.

9) Finally it is good to identify your speed bottle necks,
before you start changing things, for example:

If the RAM is marginal, it will not run reliably at the
increased bus speeds. The mother board (BIOS)
compensates for this when calculating the timing
settings, and increases the number of bus-cycle wait
states. The net result is that your faster CPU can result,
in a slower computer under some conditions.

Another thing people tend to ignore is the amount of RAM.
RAM is 10,000,000x faster then hard disk.

When a computer (Windows) starts running out of RAM,
it begins to swap less used data to hard disk, in a process
called virtual memory paging. If it pages too much, it is
called thrashing. A thrashing computer can take hours or
even days to perform a task that should only take a few

Increasing the speed of the CPU by 20% often doubles the
cost. The same amount of money is put to better use
increasing the amount (and quality) of RAM, with much
more impressive results.

For a Pentium-4 based XP machine I recommend 2 Gigs
of RAM, only because 32-bit Windows can only access
4-Gigs, 2 of which are reserved for the OS and remapping
the video card. This leaves 2 Gigs for user app's.

IT is possible to configure windows to use a little more, by
setting the /3GB or the /uservalu= switch within the boot.ini
file but this can lead to unforeseen complications.

The problem with 64-bit windows is that it still has limited,
driver support and you need a 64-bit motherboart/CPU
such as a core-2-duo.

Good luck, please rate my answers.


Jul 15, 2008 | ASUS P4P800-VM MB, 865G/ 800FSB/ SATA/...

1 Answer

Reinstalling a pentium 4 1.7ghz onto motherboard

donot attempt to install cpu with heatsink attached, detach and install.

Dec 13, 2007 | Computers & Internet

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