Question Can the heatsink somehow evaporate the water of the inside ?

[PabloCalatayud]

I mean, without any damage done to the heatsink ?

 

[drivinfast247]

Heatsink water? What do you mean?

 

[PabloCalatayud]

Heatsink water? What do you mean?

I don't know exactly, but I think heatsinks in laptops have some liquid, I think it's water, inside of them.
Can the fluid evaporate?

 

[kerberos_20]

its not water, but yes leak can happen, dead pipes arent uncommon

 

[drivinfast247]

I don't know exactly, but I think heatsinks in laptops have some liquid, I think it's water, inside of them.
Can the fluid evaporate?

A vapor chamber. I don't believe those could ever "dry up". If it gets damaged, yes

 

[PabloCalatayud]

its not water, but yes leak can happen, dead pipes arent uncommon

And what are the symptoms?

 

[PabloCalatayud]

A vapor chamber. I don't believe those could ever "dry up". If it gets damaged, yes

Nope, no damage in the heatpipe, because problems with heat started some months ago

 

[kerberos_20]

Nope, no damage in the heatpipe, because problems with heat started some months ago

if one side of pipe is hot and another side is cold, then it leaked, its filled with gas btw
if both sides are hot, then pipe is fine, and you probably need to undust heatsink around fan or repaste cpu/gpu

 

[PabloCalatayud]

if one side of pipe is hot and another side is cold, then it leaked, its filled with gas btw
if both sides are hot, then pipe is fine, and you probably need to undust heatsink around fan or repaste cpu/gpu

Already repasted adn cleaned dust.
How do I know if one side is cold and the ohter hot?

 

[kerberos_20]

use finger

 

[PabloCalatayud]

use finger

But I have to open my laptop and in that time I think the temperature is going stabilize itself.

 

[kerberos_20]

if you have temperature issues, you will anyway endup opening it for undusting/repasting it

 

[PabloCalatayud]

if you have temperature issues, you will anyway endup opening it for undusting/repasting it

I've done it before, but it doesn't help.

 

[BFG-9000]

Yes, I've had heatpipes go bad. It's obvious they are made by soldering or crimping one end shut (after filling with some working fluid under partial vacuum) which can crack or leak without showing any obvious signs except they no longer transfer heat.

The working fluid inside is nearly always water for cooling electronics because it's cheap + effective and water works in the temperature range we are interested in (in spacecraft it's ammonia because at the temperatures they are subjected to, water would freeze). These things are supposed to always run at low pressures inside (which greatly reduces the boiling temperature) but if you apply enough heat to them as in these passively cooled Dell GPUs, well then something's got to give:

It's a bloated vapor chamber but note the short stub of pipe that was used to fill the water and crimped.

 

[PabloCalatayud]

Yes, I've had heatpipes go bad. It's obvious they are made by soldering or crimping one end shut (after filling with some working fluid under partial vacuum) which can crack or leak without showing any obvious signs except they no longer transfer heat.

The working fluid inside is nearly always water for cooling electronics because it's cheap + effective and water works in the temperature range we are interested in (in spacecraft it's ammonia because at the temperatures they are subjected to, water would freeze). These things are supposed to always run at low pressures inside (which greatly reduces the boiling temperature) but if you apply enough heat to them as in these passively cooled Dell GPUs, well then something's got to give:

It's a bloated vapor chamber but note the short stub of pipe that was used to fill the water and crimped.

Can this be from night to day? I mean, suddenly?
Alco, can this be the cause of thermal throttling in CPU playing some videogames of 2003?

 

[BFG-9000]

Considering heatpipes must boil their working fluid to work, the instant that atmospheric pressure leaks into them they stop working, even before they dry out.

Usually it's only one pipe that goes bad so the heatsink still sort of works but poorly. If it's a vapor chamber though, there's only one heatpipe--a very wide one--so if that leaks then the heatsink won't work at all. In the picture we see a very puffed-up vapor chamber which is still working but the contact surface to the GPU die is no longer flat so conducts heat poorly. It's just an example that the solder or crimp isn't necessarily the weak point so it can crack anywhere. Since the working fluid water leaves no oily residue you won't find where that is either (not that it matters since you cannot repair it, only replace).

 

[kerberos_20]

Considering heatpipes must boil their working fluid to work, the instant that atmospheric pressure leaks into them they stop working, even before they dry out.

Usually it's only one pipe that goes bad so the heatsink still sort of works but poorly. If it's a vapor chamber though, there's only one heatpipe--a very wide one--so if that leaks then the heatsink won't work at all. In the picture we see a very puffed-up vapor chamber which is still working but the contact surface to the GPU die is no longer flat so conducts heat poorly. It's just an example that the solder or crimp isn't necessarily the weak point so it can crack anywhere. Since the working fluid water leaves no oily residue you won't find where that is either (not that it matters since you cannot repair it, only replace).

saw on youtube somebody drilled two holes on both ends, injected oil from one hole until oil came from second hole, then soldered both holes...redneck engineering xD