Database Users

Feasibility of a DIY heatsink

I've seen a couple of threads in the past where people have asked about creating heatsinks for improving the cooling efficiency of their devices. Under normal circumstances a heatsink wouldn't be necessary, but recently with Clemsyn and other kernel devs starting to push the physical limits of the Tegra 3, heat dissipation becomes a major concern at 1.8Ghz and higher. I'm starting to wonder if there might be a way to get creative with some copper foil and a few old laptop heatsinks I've got lying around, just to give the chips a bit of relief from all of the mean and terrible things I do to them. But having never taken my Nexus apart, I have no idea what kind of room is available for heat pipes or foil.
Anybody ever tried making a heatsink for a tablet or phone? This isn't meant to be wholly a serious discussion, and I fully expect to get a lot of flack about battery usage and melting plastic. I just think it would be cool to mod the device into being able to maintain these ridiculous clock speeds and not have it burn my hands.

using the clemsyn 2ghz kernel in front of the a/c works out well

There's very little empty space inside the Nexus 7, so there's no chance of adding additional cooling without more major modding.

I've been looking in to exactly this. I find my Tegra 3 gets to 60 C even before overclocking. If you study the teardown photos you can get an idea of how it might work. I turns out the main SoC chip's headspreader is nicely accessible.
The back pops off the Nexus 7 so easily we can easily take a peak.
My first idea would be to put a little thermal paste in each layer on the SoC's heat spreader, this is covered by a copper RF shield/heat spreader on the chip, and another copper layer on the back cover. Just a tiny dab would do, and it will be smooshed out over an area when the cover goes on. Could get a bit messy though.
There's exactly zero room to work with, it's all very tightly packed and a nicely engineered tablet.
But the back cover is so replaceable you could cut in to it.
If I was going to do it myself I would cut through all layers and have a heatsink directly on the tegra's heatspreader with an adhesive thermal pad. Any more than about something like 1-2mm and it would not be flush with the rear cover.
Alternately some perforation in the plastic on the rear around the area may help.
If i can scrounge some replacement parts I might have a crack at doing stuff.

Whoa whoa whoa, 2GHZ?
BRB !!

Mungulz said:
Whoa whoa whoa, 2GHZ?
BRB !!
Click to expand...
Click to collapse
Yeah, for those people who want to fry their Nexus 7s.
I've only OC'd to 1.4 GHz..not so sure I'll go much farther than that.

Easy Fix for Throttling

Edit: This is just a fun project. Every octa core phone throttles. That includes my S6. Its AnTuTu score from 5 back to back runs with similar 32C start ranges from 65K to 52K. That means a similar drop in performance. Also overheating & throttling are two very different things. Z3+ & S6 both throttle so that they don't get too hot (or 'overheat'). Glass backs on both don't help either, but I like them anyway. I was just trying to speed up the cooling process- not to cool down anything as the phone doesn't 'overheat' in the first place. You won't notice this throttling with regular usage & all these temperature numbers are for internal temp, not surface temp. I hope this clears up my intent. *End of Edit* 07/21/2015
This is probably the easiest way to decrease throttling during heavy CPU workload. All I had to do is insert few foil layers between the phone & TPU case. Attached picture shows plots from three scenarios - no case, just case, foil & case respectively. Oh, NFC will get blocked out by the foil. But I don't use it much anyway. Cheers.

#Reserved#

Very interesting thread, mate! It made my lazy as* to sign up just to post my results. Oh, I used this copper foil with a case. You won't need that much, btw lol
amazon dot com/Louis-Crafts-Copper-Foil-Inches/dp/B0042SWM98
My scores (normalized like yours) from 5 consecutive AnTuTu runs (& my initial temp was also a bit higher than yours)
Initial Temp (C) Score
0 34 100%
1 48.1 91.10%
2 49.1 86.86%
3 49.8 84.80%
4 50.1 83.00%
4K Test:
Outdoor-> 4 minutes in 96F / 35.5 degree Celsius weather (starting CPU temp was 37C as I was using few apps before the recording started )
Walked back home two minutes later and then
Indoor -> 9.5 minutes (CPU was still warm at 41C)
It really is the easiest fix ever for extreme users who use case anyway. Thanks!

nfs2010 said:
Oh, I used this copper foil with a case. You won't need that much, btw lol
Click to expand...
Click to collapse
That's freakin' awesome, dude :good: I never knew copper foil existed. Since I can't afford diamond foil, I'll go with copper I'll take the whole roll though as people are (primarily) using it for shielding their guitar pickups. Thanks a lot for your tip.

Have you guys considered the fact that the phone might, and let me say it again, MIGHT get hotter because we're in summer and it's seriously hot outside? I just checked the forecast for Austin TX, OP's town according to his info, and he has 37C over there. I think that MIIIIIIIIIIIIIIGHT have something to do with the phone getting hotter than usual.
Just saying.

schecter7 said:
This is probably the easiest way to decrease throttling during heavy CPU workload. All I had to do is insert few foil layers between the phone & TPU case. Attached picture shows plots from three scenarios - no case, just case, foil & case respectively. Oh, NFC will get blocked out by the foil. But I don't use it much anyway. Cheers.
Click to expand...
Click to collapse
What do you think about putting foil around the actual battery? Some people have suggested putting paper around it. Does anyone think either of those things are safe?

MarkMRL said:
Have you guys considered the fact that the phone might, and let me say it again, MIGHT get hotter because we're in summer and it's seriously hot outside? I just checked the forecast for Austin TX, OP's town according to his info, and he has 37C over there. I think that MIIIIIIIIIIIIIIGHT have something to do with the phone getting hotter than usual.
Just saying.
Click to expand...
Click to collapse
Yes, it's quite hot over here in ATX. I added an extra comment to my first post. I hope that makes things clear now.
pacattack81 said:
What do you think about putting foil around the actual battery? Some people have suggested putting paper around it. Does anyone think either of those things are safe?
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Click to collapse
The foil will short out the internal components and your phone may get toasted . Please DO NOT try it. But I really wanted to open the back and put some thermal compound like this one. I'll try it some day!

schecter7 said:
Yes, it's quite hot over here in ATX. I added an extra comment to my first post. I hope that makes things clear now.
The foil will short out the internal components and your phone may get toasted . Please DO NOT try it. But I really wanted to open the back and put some thermal compound like. I'll try it some day!
Click to expand...
Click to collapse
Thanks I was very close to trying it out. Funny you should mention the thermal compound...there's a guy on YouTube who opened up the nexus 5 and put some on the CPU and a little piece of metal
heat sink. I have the thermal compound but I don't have the piece of heatsink to test it out so I haven't tried it. One day I'm going to try it though as I have a nexus 5.

pacattack81 said:
Thanks I was very close to trying it out. Funny you should mention the thermal compound...there's a guy on YouTube who opened up the nexus 5 and put some on the CPU and a little piece of metal
heat sink. I have the thermal compound but I don't have the piece of heatsink to test it out so I haven't tried it. One day I'm going to try it though as I have a nexus 5.
Click to expand...
Click to collapse
That's great! You'll have better luck with the compound on the N5 as it has plastic back - I guess? On Z3+, I'll probably get bottle-necked by the glass back regardless of the internal enhancement. I could be wrong though if the heat sink goes all the way to metal side frame. It's certainly worth a shot.
As battery wrap, you'd probably want something that's thermally conductive AND electrically non-conductive.

schecter7 said:
That's great! You'll have better luck with the compound on the N5 as it has plastic back - I guess? On Z3+, I'll probably get bottle-necked by the glass back regardless of the internal enhancement. I could be wrong though if the heat sink goes all the way to metal side frame. It's certainly worth a shot.
As battery wrap, you'd probably want something that's thermally conductive AND electrically non-conductive.
Click to expand...
Click to collapse
Yea, there's got to be something you can wrap around a smartphone battery that could shield in the heat. I just bought an oppo find 7a and it has a removable back. Maybe some sort of insulation can be put on the inside back cover so your hands don't feel the heat when the phone heats up. Any ideas for either the battery and/or back cover? What's thermally conductive, but not electrically conductive?
---------- Post added at 09:28 PM ---------- Previous post was at 09:08 PM ----------
pacattack81 said:
Yea, there's got to be something you can wrap around a smartphone battery that could shield in the heat. I just bought an oppo find 7a and it has a removable back. Maybe some sort of insulation can be put on the inside back cover so your hands don't feel the heat when the phone heats up. Any ideas for either the battery and/or back cover? What's thermally conductive, but not electrically conductive?
Click to expand...
Click to collapse
I can't post links yet, but what about putting some cotton insulation inside the back case? I would think that might shield us from holding a hot phone. Also, what about reflective insulation tape? I think that might actually work. Thoughts?

pacattack81 said:
Yea, there's got to be something you can wrap around a smartphone battery that could shield in the heat. I just bought an oppo find 7a and it has a removable back. Maybe some sort of insulation can be put on the inside back cover so your hands don't feel the heat when the phone heats up. Any ideas for either the battery and/or back cover? What's thermally conductive, but not electrically conductive?
---------- Post added at 09:28 PM ---------- Previous post was at 09:08 PM ----------
I can't post links yet, but what about putting some cotton insulation inside the back case? I would think that might shield us from holding a hot phone. Also, what about reflective insulation tape? I think that might actually work. Thoughts?
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Click to collapse
Wait, we're not on the same page. I was trying to avoid throttling (not shielding the heat). Z3+ back side heats up where the CPU seats (very small spot somewhere underneath the top row of icons). The idea was to take that heat and spread it laterally over a bigger surface area to speed up the cooling process. Without the foil, I still don't feel the heat as my fingers don't touch that hot spot. The foil also indirectly reduces the hot feel from that tiny spot as the heat gets spread more uniformly.
But your case sounds different. You want to avoid the heat from the battery (or the CPU) ? Battery already has a pretty big surface area. And you probably don't want to keep the heat inside by using thermal insulators as that can be very harmful for the battery. You probably want to establish an even faster heat transfer to the environment so that equilibrium point can be maintained at a lower surface temperature. Is that right? A metal back cover can help in that case.
Also here are some electrical insulators that are thermally conductive - but I'm not quite sure about the availability of those
https://www.physicsforums.com/threa...ductive-thermally-conductive-material.125368/

schecter7 said:
Wait, we're not on the same page. I was trying to avoid throttling (not shielding the heat). Z3+ back side heats up where the CPU seats (very small spot somewhere underneath the top row of icons). The idea was to take that heat and spread it laterally over a bigger surface area to speed up the cooling process. Without the foil, I still don't feel the heat as my fingers don't touch that hot spot. The foil also indirectly reduces the hot feel from that tiny spot as the heat gets spread more uniformly.
But your case sounds different. You want to avoid the heat from the battery (or the CPU) ? Battery already has a pretty big surface area. And you probably don't want to keep the heat inside by using thermal insulators as that can be very harmful for the battery. You probably want to establish an even faster heat transfer to the environment so that equilibrium point can be maintained at a lower surface temperature. Is that right? A metal back cover can help in that case.
Also here are some electrical insulators that are thermally conductive - but I'm not quite sure about the availability of those :confused
Click to expand...
Click to collapse
I've tried TPU cases, but I still feel the heat. Maybe a metal case would be better. These look interesting.
amazon(dot)com/gp/aw/d/B00HNKD6A6/ref=pd_aw_sbs_107_1?refRID=1VRK3Q399HJZXA2GHWCJ
amazon(dot)com/gp/aw/d/B00L71LNS4/ref=pd_aw_sbs_107_1?refRID=1BQ362P6XMYRJET82TFG

pacattack81 said:
I've tried TPU cases, but I still feel the heat. Maybe a metal case would be better. These look interesting.
amazon(dot)com/gp/aw/d/B00HNKD6A6/ref=pd_aw_sbs_107_1?refRID=1VRK3Q399HJZXA2GHWCJ
amazon(dot)com/gp/aw/d/B00L71LNS4/ref=pd_aw_sbs_107_1?refRID=1BQ362P6XMYRJET82TFG
Click to expand...
Click to collapse
Interesting! So why does your battery heat up in the first place? Did you try to compare your battery temp (using CPU Z, etc) to others'? I thought battery only heats up during charging.

schecter7 said:
Edit: This is just a fun project. Every octa core phone throttles.
Click to expand...
Click to collapse
That was genius--thank you.

I've attached a heatsink with thermal paste (cheap one) to my nexus 4 once it didn't make a difference
too bad i sold it i can't try it with my Peltier (TEC)
and my note 4 here is cooler without my tough armor (ofc it is, that case is a monster) i think i bent my phone while taking it out will try it with foil as soon as i get one, hope it doesn't damage it :S
a copper plate would be better! or simply a thin heatsink

I tried this maybe a year ago, phone was a lot cooler but I lost my reception. I noticed this after few days, everyone thought something had happend because they couldn't reach me. I was busy gaming ?

Because the phone is opened from the back (http://www.witrigs.com/blog/sony-xperia-z4-teardown/) we should crowdfund a metal replacement made of aluminium but in the same glossy style and color the frame is and with a copper base which directly connects to the thermonuclear fusion core (aka Qualcomm) so that the heat is as best as possible transported from these to the whole backplate. The only difficulty will be the holes for the camera and LED light to be waterproof. And while we are at it, we could make the backplate a little bit ticker than the glass currently is so that the tiny height difference between the glass and the frame is gone too.
Ok, we can argue about the color and thickness but you get the idea. Should we do that? Once we got them funded we can sell them and get rich

an3k said:
Because the phone is opened from the back (http://www.witrigs.com/blog/sony-xperia-z4-teardown/) we should crowdfund a metal replacement made of aluminium but in the same glossy style and color the frame is and with a copper base which directly connects to the thermonuclear fusion core (aka Qualcomm) so that the heat is as best as possible transported from these to the whole backplate. The only difficulty will be the holes for the camera and LED light to be waterproof. And while we are at it, we could make the backplate a little bit ticker than the glass currently is so that the tiny height difference between the glass and the frame is gone too.
Ok, we can argue about the color and thickness but you get the idea. Should we do that? Once we got them funded we can sell them and get rich
Click to expand...
Click to collapse
That'd be excellent & throttling would probably be gone forever. I'm in But some dudes might mix up fast heat dissipation with 'overheating & throttling & battery drain' - all in one sentence The rear area that gets warm on Z3+ is actually very narrow & my fingers don't touch that part at all. But we've already seen a ridiculous amount of whining over that. Can you imagine the whining as we try to expand that dissipation area to get rid of throttling?
I think the thickness would be debatable as some may want to keep the slightly raised lips on the back to keep their phones from sliding around.

fredrik8 said:
I tried this maybe a year ago, phone was a lot cooler but I lost my reception. I noticed this after few days, everyone thought something had happend because they couldn't reach me. I was busy gaming
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Click to collapse
lol - good point. It depends on the antenna placement - I think. I didn't experience any difference in reception. I usually get 0-1 bar at home. So I really didn't have anything to lose in the first place lol

If you do this and have the phone on max brightness, does it auto-dim when loading xda's website?
Due to all the ads and issues with the website it always causes the screens brightness to throttle when loading, and then go back to full brightness afterwards.
(Try loading a couple of different topics when doing this)

Adding a heat sink?

Sorry for the noob question, but I have this new "core board" in the attached picture.
Do I just need to glue a heat sink to the silver part, obviously moving the cord out of the way?
Is it that simple, or are there certain spots to avoid?

I wonder if this drilled plate can be removed just to check its alignment to chip. Having just a fan above this (attached to HU's walls) might turn better solution.

ste2002 said:
I wonder if this drilled plate can be removed just to check its alignment to chip. Having just a fan above this (attached to HU's walls) might turn better solution.
Click to expand...
Click to collapse
So just remove the screws and see what is under there?

Yes. Some of us report that thermal paste is missing/no contact with plate etc. Such setup as in your photo - I've never seen yet though, but it is good to make sure the contact is properly arranged - then additional heatsink makes sense.

So if something is not touching the top part, a heat sink will do nothing?

I took the heat sink off mine. It did appear to have good contact with all the chips, but before replacing it, I spread the heatsink compound evenly across all the chips.
Then I added extra heatsinks on top with thermal adhesive, and added fan to top cover. See main heatsink thread for details, and read from beginning. Here's my post. https://forum.xda-developers.com/showpost.php?p=75274018&postcount=154

CadillacMike said:
So if something is not touching the top part, a heat sink will do nothing?
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Click to collapse
Even "better": it will block available vent holes. IMHO if there is no proper contact *and* no way it can be restored/arranged, then fan can do the cooling job via vent holes.

pwood999 said:
I took the heat sink off mine. It did appear to have good contact with all the chips, but before replacing it, I spread the heatsink compound evenly across all the chips.
Then I added extra heatsinks on top with thermal adhesive, and added fan to top cover. See main heatsink thread for details, and read from beginning. Here's my post. https://forum.xda-developers.com/showpost.php?p=75274018&postcount=154
Click to expand...
Click to collapse
It also acts to suppress RFI and acts as a heat spreader.
For my PX5 Android 6, I replaced the thermal compound on the heat spreader, added a heatsink and fan. Bonded using thermal adhesive, all parts repurposed from old laptop. Includes connectors, supply sourced from unit switched 5v which is powered off on sleep. Simple resistive voltage drop added results in cool temps and barely audible fan.
I have further modified the case top section to add a grill and filter medium.

ste2002 said:
I wonder if this drilled plate can be removed just to check its alignment to chip. Having just a fan above this (attached to HU's walls) might turn better solution.
Click to expand...
Click to collapse
Agree. Replace thermal compound and a fan either pulling hot air from or blowing cool air onto the SOM heat spreader and sourced externally should keep things cool.

[HW Mod] Improve performance, prevent thermal throttle

Inspired on this hardware mod I followed on my Nexus 4 years ago I decided to experiment with my LG G5 after experiencing unstable performance while gaming, tried tweaking the software with kernels and roms but with no noticeable results longterm.
This mod is fairly easy, there is a 0.6mm gap between our processor-ram chip and the metal frame under the screen, I didn't find a copper plate to use and didn't want to wait to order it online so I made one by stacking copper wires and soldering them together, then gradually trimming it with sand paper, so performance could be even better. Used thermal paste on either side, stick the plate on the chip side first and apply some pressure. Attached pictures of the process and benchmark results. Results can be repeated indefinitely with no variation within the margin of error. Ambient temperature is very hot here in the south of Spain, with no AC used.
Rom used is Lineage 15.1 by x86cpu stock kernel with no tweaks.
View attachment 4558395View attachment 4558396
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Sent from my LG-H850 using Tapatalk

Here are 4 consecutive antutu runs at 32°C ambient temperature, before doing so I was streaming in twitch with it for a while. (phone with mod)
https://i.imgur.com/zPivOMH.png
https://i.imgur.com/sxk1uEK.png
https://i.imgur.com/YTPoPOD.png
https://i.imgur.com/1vvuvuN.png

awesome work.. i see this run very well in past, with snapdragon 810 smartphones based. But i think if us use a metal glued in back part of the lg g5, maybe the overheat down, because lg g5 body is a aluminum material, used like sink of temperature... anyway, this score is very high and stable... better than the lg g6 (SNAPDRAGON 821) and lg v20 (SNAPDRAGON 820). thanks for sharing us, your great work Maybe I try this in my lg g5 h830 ?

sedrake said:
awesome work.. i see this run very well in past, with snapdragon 810 smartphones based. But i think if us use a metal glued in back part of the lg g5, maybe the overheat down, because lg g5 body is a aluminum material, used like sink of temperature... anyway, this score is very high and stable... better than the lg g6 (SNAPDRAGON 821) and lg v20 (SNAPDRAGON 820). thanks for sharing us, your great work Maybe I try this in my lg g5 h830 [emoji106]
Click to expand...
Click to collapse
Thanks! The processor on LG G5 is on the other side of the motherboard, it makes no contact to the back of the phone sadly, it would work even better. The good thing is that the screen frame is also made of metal and generates plenty of dissipation. [emoji108]
Sent from my LG-H850 using Tapatalk

jaggyjags said:
Thanks! The processor on LG G5 is on the other side of the motherboard, it makes no contact to the back of the phone sadly, it would work even better. The good thing is that the screen frame is also made of metal and generates plenty of dissipation. [emoji108]
Sent from my LG-H850 using Tapatalk
Click to expand...
Click to collapse
LOOK THAT... Not to great score like your internal mod, but awesome external mod... for me ?
The heat pipes is very very hot. So, the lg g5 use your aluminum body like a thermal condition... my score have 2k more with thermal pads and dreamcast heat pipes ?

jaggyjags said:
Inspired on this hardware mod I followed on my Nexus 4 years ago I decided to experiment with my LG G5 after experiencing unstable performance while gaming, tried tweaking the software with kernels and roms but with no noticeable results longterm.
This mod is fairly easy, there is a 0.6mm gap between our processor-ram chip and the metal frame under the screen, I didn't find a copper plate to use and didn't want to wait to order it online so I made one by stacking copper wires and soldering them together, then gradually trimming it with sand paper, so performance could be even better. Used thermal paste on either side, stick the plate on the chip side first and apply some pressure. Attached pictures of the process and benchmark results. Results can be repeated indefinitely with no variation within the margin of error. Ambient temperature is very hot here in the south of Spain, with no AC used.
Rom used is Lineage 15.1 by x86cpu stock kernel with no tweaks.
View attachment 4558395View attachment 4558396View attachment 4558397View attachment 4558398View attachment 4558399View attachment 4558429View attachment 4558430
Sent from my LG-H850 using Tapatalk
Click to expand...
Click to collapse
I have a metal cover over my chips. How did you pull that off and did you have any issue with interferance after that? I assume thats what its for.

corvettezo7sp said:
I have a metal cover over my chips. How did you pull that off and did you have any issue with interferance after that? I assume thats what its for.
Click to expand...
Click to collapse
What you see it's just a metal shield hold together with some clips, use your finger nail or the tip a knife to gently lift it up, it's reversible. It was probably intended to protect against electromagnetic interference but I'm pretty sure it's a preventive measure with no real benefits of having it on, the other three covers are still used and I believe no radio chips are on the section I removed.

jaggyjags said:
What you see it's just a metal shield hold together with some clips, use your finger nail or the tip a knife to gently lift it up, it's reversible. It was probably intended to protect against electromagnetic interference but I'm pretty sure it's a preventive measure with no real benefits of having it on, the other three covers are still used and I believe no radio chips are on the section I removed.
Click to expand...
Click to collapse
Got it! Used a artic thermal pad. When playing games I get a blue spot on the screen where the processor is it gets so hot so I know it working. Max temp is 58 degrees Celsius. Must have put something together incorrectly because my touch screen jitters a bit swiping like not all the digitizer sensors are seeing my figure. I do, thanks for the post. These phones are so cheap though. If I need another ill just buy one for 60$.

corvettezo7sp said:
Got it! Used a artic thermal pad. When playing games I get a blue spot on the screen where the processor is it gets so hot so I know it working. Max temp is 58 degrees Celsius. Must have put something together incorrectly because my touch screen jitters a bit swiping like not all the digitizer sensors are seeing my figure. I do, thanks for the post. These phones are so cheap though. If I need another ill just buy one for 60$.
Click to expand...
Click to collapse
Thanks, I used sand paper to make it the right thickness, if the metal plate is too thick you will see a purplish shadow on that area, it's just caused by too much pressure under the screen, try it several times without thermal paste until you see no shadow. The 0.6mm I said was my guess comparing it with some coins and their widths, it may be 0.5mm, don't have the right measurement equipment. Don't worry, the blue spot will go away completely.
It makes sense for the shadow to be worse with heat because metal expands slightly with it. The motherboard should lie nearly flat over the screen frame after you put all the screws.
I'm not sure about the touch screen responsiveness, had no issues on my test even with slightly thick metal plate, could go away without the screen stress under it.
Sent from my LG-H850 using Tapatalk

jaggyjags said:
Thanks, I used sand paper to make it the right thickness, if the metal plate is too thick you will see a purplish shadow on that area, it's just caused by too much pressure under the screen, try it several times without thermal paste until you see no shadow. The 0.6mm I said was my guess comparing it with some coins and their widths, it may be 0.5mm, don't have the right measurement equipment. Don't worry, the blue spot will go away completely.
It makes sense for the shadow to be worse with heat because metal expands slightly with it. The motherboard should lie nearly flat over the screen frame after you put all the screws.
I'm not sure about the touch screen responsiveness, had no issues on my test even with slightly thick metal plate, could go away without the screen stress under it.
Sent from my LG-H850 using Tapatalk
Click to expand...
Click to collapse
Its actually perfectly responsive, just not smooth. May be an app I installed so I will try resetting first. Not sure how I would file down a thermal pad. Its like a gritty rubber. Here's the link to what I got: ARCTIC - Thermal Pad 50 x 50 x 1.0 mm https://www.amazon.com/dp/B00UYTTDO6/ref=cm_sw_r_cp_apa_wvJBBbP1943TM Its super efficient. Maybe I could take it apaart again and press on the voard to flatten it a bit more.

corvettezo7sp said:
Its actually perfectly responsive, just not smooth. May be an app I installed so I will try resetting first. Not sure how I would file down a thermal pad. Its like a gritty rubber. Here's the link to what I got: ARCTIC - Thermal Pad 50 x 50 x 1.0 mm https://www.amazon.com/dp/B00UYTTDO6/ref=cm_sw_r_cp_apa_wvJBBbP1943TM Its super efficient. Maybe I could take it apaart again and press on the voard to flatten it a bit more.
Click to expand...
Click to collapse
Oh, I misunderstood, probably 1mm thermal pad makes too much pressure on the screen when trying to flatten it to half of its thickness.
I found very cheap metal plates on ebay and aliexpress which is always better in terms of thermal conductivity compared to thermal pads. Or maybe thinner pads are also available.
http://m.aliexpress.com/item/32773823737.html?source=images
Sent from my LG-H850 using Tapatalk

jaggyjags said:
Oh, I misunderstood, probably 1mm thermal pad makes too much pressure on the screen when trying to flatten it to half of its thickness.
I found very cheap metal plates on ebay and aliexpress which is always better in terms of thermal conductivity compared to thermal pads. Or maybe thinner pads are also available.
http://m.aliexpress.com/item/32773823737.html?source=images
Sent from my LG-H850 using Tapatalk
Click to expand...
Click to collapse
Reset and screen is smooth again. No idea what happened but something changed while it was apart. I will order one of those. I really appreciate it. Whats your max temp with your metal material?? Not sure if 58c is high but before my entire phone would get hot. Now its just the front display. I really appreciate your thread and insight.

corvettezo7sp said:
Its actually perfectly responsive, just not smooth. May be an app I installed so I will try resetting first. Not sure how I would file down a thermal pad. Its like a gritty rubber. Here's the link to what I got: ARCTIC - Thermal Pad 50 x 50 x 1.0 mm https://www.amazon.com/dp/B00UYTTDO6/ref=cm_sw_r_cp_apa_wvJBBbP1943TM Its super efficient. Maybe I could take it apaart again and press on the voard to flatten it a bit more.
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really interesting...I would choose the pad with 0,5 mm...think this would do the trick...just bought two G5s with an broken display and ordered a display. you get photos if everything is prepared.
perhaps this pad is more efficient:
https://www.amazon.de/Alphacool-Eis...1533978184&sr=1-9&keywords=thermal+pad+1&th=1

MaStErB_1984 said:
really interesting...I would choose the pad with 0,5 mm...think this would do the trick...just bought two G5s with an broken display and ordered a display. you get photos if everything is prepared.
perhaps this pad is more efficient:
https://www.amazon.de/Alphacool-Eis...1533978184&sr=1-9&keywords=thermal+pad+1&th=1
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Definitely. Its 14w/mk. Much better than I got. Although I do beleive our cpus only need 1.5w/nk to be sufficient. Maybe ill get some of that and experiment with all the different materials. Ill post pictures myself if I dissasemble again. Since the reset though everyrhing has been smooth and cool. I'm in that dont touch but play harder mode. PUBG is flawless now and I havent lost a game since the mod. ? perfectly smooth through every game!

corvettezo7sp said:
Definitely. Its 14w/mk. Much better than I got. Although I do beleive our cpus only need 1.5w/nk to be sufficient. Maybe ill get some of that and experiment with all the different materials. Ill post pictures myself if I dissasemble again. Since the reset though everyrhing has been smooth and cool. I'm in that dont touch but play harder mode. PUBG is flawless now and I havent lost a game since the mod. perfectly smooth through every game!
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Very interesting!
You must use thermally conductive pads? It is not enough to use a thermo-conductive paste only, like in pc cpu?

coolmaker said:
Very interesting!
You must use thermally conductive pads? It is not enough to use a thermo-conductive paste only, like in pc cpu?
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Correct. The gap is too wide to use paste only. The thermal paste has a conductivity rating of 6 w/mk but only when its super thin. Like 1 1000ths of an inch thick. The thermal pads have the same heat conductivity even when they are thicker and are allot cleaner for the small space they are.

corvettezo7sp said:
Correct. The gap is too wide to use paste only. The thermal paste has a conductivity rating of 6 w/mk but only when its super thin. Like 1 1000ths of an inch thick. The thermal pads have the same heat conductivity even when they are thicker and are allot cleaner for the small space they are.
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You are amazing, Thank you for the explanation, I did not know that!

coolmaker said:
You are amazing, Thank you for the explanation, I did not know that!
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Here's some more pictures to make it easier or if you have done it already for someone who hasn't done it. I have a G5 that broke. Miss it, it was my first one. Definitely better than my current one. The previous owners water damage finally did it in. Anyway, here's a picture of the main board with screws and cameras removed in the display frame, a picture of the motherboard folded over from the left of the display frame, and a picture of the CPU up close. I have removed all shields so you will need to pull those off if you haven't already. I recommend plastic. Also these pictures will help you see where it lines up on the frame. Also while your in there you should do the GPS fix. Re assembly will either fix it or make it worse if it was previously working. Also the last picture is of the small connector that lines up to the rear of the frame. If you screw this up you may have signal issues. Line up the top of the display first before assembly. Don't slide the display up. Anyway, I'm going to also try thermal pads on the rear of the CPU next to see if the power supply resistors could use cooling as well.

Luckily I found this on time because the temp was around 85 C and it was leaving alot of image retention, after finding out this mod, I took a penny and filed it down thin enough not too thin but not too thick and then I put thermal paste on the CPU and have the penny in the same area as the CPU, it is a very tight fit and the screen is slightly warped upwards, but no problems and it has been much cooler, dropped it by 50 - 60 C. I give you lots of kudos for this :3

Hello everyone, just a follow question up to some of the comments.
Does the 0.5mm thermal pad fit? or is it better to use the copper sheets?
Thank you!

Thermal Repaste

Hi how many of you have done it and is it really useful and worth the trouble? thx

nostupidthing said:
Hi how many of you have done it and is it really useful and worth the trouble? thx
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I have on my H910 phone. I would say it should help prolong the life of the phone, heat is the number one enemy of cpu's. It does speed up the phone I think, if anything it wont hurt.
I used a 0.5mm copper shim and Arctic silver. I left the copper tape on the cpu because the cpu is not designed to have thermal paste applied directly to it. I applied the Arctic Silver to the cpu then applyed the copper shim to the cpu then put paste on the base of phone. That way you can make sure it's on the right spot on the board. My idle temps are around 30c.
Also I used very fine sandpaper on the copper shim before installing in my phone. There was a little lip on one side.
PS. I used just a little paste and did not spread it out. I put my finger on there and applied a little pressure to spread it out.
This is what I bought.
Honbay 25pcs 5 Sizes 15x15mm IC Chipset GPU CPU Thermal Heatsink Copper Pad