diy heatsinks - please give some advices

[mightydub]

Originally Posted by MJL21193

The heatpipe idea in mobos is mainly to attract the buyer - it looks cool and sounds cool: "look at that, it's a heatpipe!!".
They are no more efficient than the standard cooler.

To clairfy a bit - the heatpipe moves heat from one place (the package of the hot component) to another (a radiating surface) and doesn't do much cooling by itself. The advantage is that you can move the heat from a very small area to a very large area where it can then be moved to a different medium (the air.) So in the sense that you can quickly get the heat moved to a large radiating area a heatpipe will be more efficient than a big chunk of aluminum.

However this is really only important for computers, where the dynamic power loads go up and down very quickly, the size and weight of the thermal solution needs to be minimized, and usually there is some mechanical or packaging reason that makes it necessary to get the heat from here to there. Laptops for example.

[trd1587]

Originally Posted by MJL21193

The heatpipe idea in mobos is mainly to attract the buyer - it looks cool and sounds cool: "look at that, it's a heatpipe!!".
They are no more efficient than the standard cooler.

Yes and I suppose they do the same in laptops so that peoples can open their laptops and show everyone that the chipset, graphic chip and cpu are connected to heat pipes.

"look dude, I Pimped my laptop!"

IT IS MORE EFFECTIVE AND IT IS LESS NOISY YOU LIKE IT OR NOT!

Marc

[MJL21193]

Originally Posted by trd1587

IT IS MORE EFFECTIVE AND IT IS LESS NOISY YOU LIKE IT OR NOT!

Marc

Your pic showed a motherboard for a desktop with a ridiculous looking contraption stuck on the processor. That's eye candy. Period.

Heat is heat. It still needs to be dissipated, whether it's right here or over there. The heatpipe solution is not more efficient than the standard blown heatsink.
Understand?

[defect9]

Heatpipes, thermally, aren't honestly that much more effective or quiet than fin cooling. what makes heatpipes so awesome is not that they look good or are quiet, but that you can use them to get the heat to a better spot for more effective cooling.

In principle, think of a water cooling solution. you use water to move the active cooling solution to a more effective spot (a radiator mounted outside the case, for example). Heatpipes allow you to move the heatload from the chip to a spot that is more fan/air friendly (such as a horizontal fan versus the intel 'top down' solution). by adding fins and increasing cooling area (and taking up more space in your case), it also allows you to more effectively cool it using fans or natural airflow in the same way that adding more surface area to a standard finned cooler works.

laptops are designed with one heatpipe combining everything because laptops are designed to produce less heat wattage than a conventional desktop (obviously why the price/performance ratio is what it is). In doing this, they only need one fan to cool 3 chips, instead of 3 separate fans. it's simply moving the heat to a more effective spot to cool it. the heatpipe itself isn't much more efficient than directly cooling each chip.

if you compare the cooling solution for, say the extreme intel processors, versus similar sized heatpipe solutions (similar sized is the caveat here), you'll find that the intel solution is actually remarkable for it's size (and even more remarkable in that the markup between retail with intel cooling and oem chip without is about $10-20).

[trd1587]

Originally Posted by MJL21193

Your pic showed a motherboard for a desktop with a ridiculous looking contraption stuck on the processor. That's eye candy. Period.

Heat is heat. It still needs to be dissipated, whether it's right here or over there. The heatpipe solution is not more efficient than the standard blown heatsink.
Understand?

BTW the links refer to heatpipe coolers. Not Motherboards. They are designed to fit motherboards but can be fairly adapted. One can sure build his own.

If you find the contraction ridiculous, I appologize. That post was'nt meant to be that way, it was to give an alternative to a guy who was asking for a solution for his own problem.

Heatpipes setup WILL be more efficient since the heat is not stuck around the source! Now I did'nt know I had to draw schematics and tell everyone how this works. I Know it because I use it and it does work. Compared to normal CPU cooler , my Q6600 runs at 12deg celsius lower than with the original CPU Cooler wich has a very noisy fan. If i Turn the fan OFF on the HeatPipes diffuser I Still run 8 degres cooler. Lets not talk about energy per square inch per atoms per seconds here! Lets talk about Raw Numbers.


If I were to design an amp I would greatly think about sending the heat toward the top or the back of the amp and use convection winds to cool the transistors (the way a "refrigerator" gets his heat out. That way the amp runs cold and the heat will not get trapped inside. Also this would allow me to put another unit on top of It.

So in my book it is a more efficient solution thank plain Alu plates stuck in the housing trapping heat.

Why it is not used more often?
1- copper price
2- space it takes
3- men x hours to produce
4- all of the above = $$$

[MJL21193]

Originally Posted by trd1587

If I were to design an amp I would...

Let us know when you get around to doing that, ok?

[sajti]

Originally Posted by trd1587

If I were to design an amp I would greatly think about sending the heat toward the top or the back of the amp and use convection winds to cool the transistors (the way a "refrigerator" gets his heat out.

Another solution, to put the heatsinks to the side or to the backside of the amplifier box. Simple, and easy, without heatpipe....

Sajti

[tinitus]

My way to control airflow into convection design

[trd1587]

Originally Posted by defect9

Heatpipes, thermally, aren't honestly that much more effective or quiet than fin cooling. what makes heatpipes so awesome is not that they look good or are quiet, but that you can use them to get the heat to a better spot for more effective cooling.

In principle, think of a water cooling solution. you use water to move the active cooling solution to a more effective spot (a radiator mounted outside the case, for example). Heatpipes allow you to move the heatload from the chip to a spot that is more fan/air friendly (such as a horizontal fan versus the intel 'top down' solution). by adding fins and increasing cooling area (and taking up more space in your case), it also allows you to more effectively cool it using fans or natural airflow in the same way that adding more surface area to a standard finned cooler works.

laptops are designed with one heatpipe combining everything because laptops are designed to produce less heat wattage than a conventional desktop (obviously why the price/performance ratio is what it is). In doing this, they only need one fan to cool 3 chips, instead of 3 separate fans. it's simply moving the heat to a more effective spot to cool it. the heatpipe itself isn't much more efficient than directly cooling each chip.

if you compare the cooling solution for, say the extreme intel processors, versus similar sized heatpipe solutions (similar sized is the caveat here), you'll find that the intel solution is actually remarkable for it's size (and even more remarkable in that the markup between retail with intel cooling and oem chip without is about $10-20).

And to close the matter:

A heat pipe is a hollow tube containing a heat transfer liquid. As the liquid evaporates, it carries heat to the cool end, where it condenses and then returns to the hot end (under capillary action, or, in earlier implementations, under gravitation). Heat pipes thus have a much higher effective thermal conductivity than solid materials. For use in computers, the heat sink on the CPU is attached to a larger radiator heat sink. Both heat sinks are hollow as is the attachment between them, creating one large heat pipe that transfers heat from the CPU to the radiator, which is then cooled using some conventional method. This method is expensive and usually used when space is tight (as in small form-factor PCs and laptops), or absolute quiet is needed (such as in computers used in audio production studios during live recording). Because of the efficiency of this method of cooling, many desktop CPU's and GPU's, as well as high end chipsets, use heat pipes in addition to active fan-based cooling to remain within safe operating temperatures.







Computer cooling - Wikipedia, the free encyclopedia

[Magura]

Heat-pipes only has a place, where space constraints makes plain ordinary heat transfer through metal an issue. Besides that, well, do the math, and you'll find that 2+2 is still 4, heat-pipes or not.

This sort of discussion pops up about every 6 month, but usually it's about water cooling.

Somehow it seems hard to grasp that energy has to go somewhere, and no magic gadget is going to change that.
You still need the same amount of heatsinking, as if you simply mount the devices directly on the heatsink, and the end result will at best, be the same as if you had done so.


Magura