over heating issues after motherboard replacment

[scrambler400]

cooper pipe is to hot to touch and the back of them mbd on other side of the cpu is where we are touching that is hot to touch. i ordered another brand of paste and another cooper heatsink to give it another try. maybe the copper pipe we are getting is infact bad 

[mdklassen]

> copper pipe is to hot to touch and the back of them mbd on other side of the cpu is where we are touching that is hot to touch.

Well, if the CPU is hot, then the bottom of the motherboard will be hot, and the "rectangle" will get heated (through the heat-paste) and the copper is a conductive material, and it should transmit the heat to the radiator, where a fan should blow room-temperature air over the radiator, and the warmed air should be expelled through the exhaust vent.

This is just "physics" -- move the heat from the heat-source to the radiator for dissipation.

> maybe the copper pipe we are getting is bad.

Maybe, but not likely, in my opinion.

How are you able to "touch" the heat-pipe?  Is the laptop partly disassembled?

By not "buttoning-up" the case, you are interfering with the flow of air produced by the fan -- not all the air is being funneled to push air ONLY through the radiator.  So the radiator stays hot, and the heat-pipe stays hot, and the CPU stays hot.

[scrambler400]

I test units like this all day long I work on laptops for a living and have an A+ cert this problem was just odd and never seen it before having the laptop open isn't going to effect the heat like this

[scrambler400]

I ordered a new heat sink and another mbd my vendor could have been sending used heat sinks so I made sure this one was new from a different vendor once I get them I will revisit this particular unit and see what happens

[mdklassen]

> .. vendor could have been sending used heat sinks.

In 1785, Antoine Lavoisier stated that matter is neither created nor destroyed.

So, I think that a "used" heat-pipe will conduct heat just as well as a "new" (created how? from what?) heat-pipe.

The melting temperature of copper is 1085 Celsius -- your CPU is not that hot!

[scrambler400]

we will see once the new one gets here i really don't know what else to do i mean 10 mbd now doing the same thing. If the heat pipe don't work then it's going to boil down to hp providing junk mbd.

[mdklassen]

> I test units like this all day long I work on laptops for a living and have an A+ cert this problem was just odd and never seen it before

Thanks for the additional information.

> having the laptop open isn't going to affect the heat like this.

I disagree. 

The case was designed by Professional Engineers (P. Eng.) to conduct heat away from the CPU, and their design requires that the case be "closed-up" for proper air-flow.

Experiment: with the "radiator" exposed, take a desktop electrical fan:

  

Attach a thermometer probe to one of the blades of the radiator.

Point the fan at the radiator, and turn it on, and measure the "static" temperature.

Start the computer, and monitor the gauge, to see if the "high-volume" fan can keep the radiator's temperature down to something like 30 to 35 Celsius.

Tell us what you observe.

P.S. Have you used the SAME CPU in all TEN motherboards, or have you tried different CPUs ?

[scrambler400 · Accepted solution]

problem has been solved I installed a new heat pipe and used NT-H1  theromo compund and the unit cools just fine. tested with the orginal heat pipe and unit heated up but the fan cooled it down but still remained hotter then normal. once the new heat pipe and the new thermo was applied it returned to normal opperation.