[GUIDE] [Hard mod] Nexus 5's throttling solved by adding thermal paste.

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pyj08178

Member
Nov 6, 2013
19
26
Try this at your own risk. Warranty is voided (obviously) if you do this mod.
I will try to add some more useful pics & links in the future.
More proof will be added if its needed.
Also this is my first guide so please pardon me and tell me what can I improve on.
(all photos here if links not working. https://www.dropbox.com/sh/ytidqu7ghvz8x1i/OIXAtT_8Pu)

Some important info first:

Phone info:
My Nexus 5 has a CPU binning of PVS 2 with -50mV undervolt for all clock speeds.
Running 4.4.2 stock rooted with latest stable Faux kernel.
Some shots of my Faux Clock settings (no signal in the pictures because i haven't put my SIM card in):
https://www.dropbox.com/s/gvmolw5vkyisio0/Screenshot_2014-01-29-00-18-24.png
https://www.dropbox.com/s/h6j0azscvg1qtq3/Screenshot_2014-01-29-00-18-45.png
https://www.dropbox.com/s/5frslsm9crdi774/Screenshot_2014-01-29-00-18-53.png
Don't even worry about that 85c limit that I set on picture 1. After this mod it wont even be close to 80c.

Antutu scores at 2.5Ghz:
30079 after mod room temperature 25c https://www.dropbox.com/s/lkeu4b9p6dgugan/Screenshot_2014-01-29-07-02-54.png
31191 before mod at temperature of -4c on a trip at a cold country https://www.dropbox.com/s/vqsilj39q39z12n/Screenshot_2014-01-29-06-14-16.png
Not the best scores but see the difference in the places tested?

Temperature immediately after 10 minutes of Asphalt 8:
(Temperature around the bottom right of the picture)
https://www.dropbox.com/s/kri8h8hxfxz19pf/Screenshot_2014-01-29-00-46-20.png
It showed 54c 1 second later but anyway its still cooler than any phone I had before.
I played until 20 minutes and there is still ZERO throttling. I haven't tried playing any longer though but at 20 minutes its just a little warm, not even close to hot.
Oh and the room temperature was 25c.

The Nexus 4 copper block mod http://xdaforums.com/nexus-4/general/hardmod-nexus-4-investigating-thermal-t2144652 isn't ideal because of the smaller gap (1.5mm vs 0.5mm) so yeah.
WARNING: DON'T follow the way they applied the thermal paste on the N4 mod thread. IT IS WRONG because it will not be evenly spreaded.
Try to use good thermal paste's like the Noctua NT-H1, Arctic Cooling MX-2/MX-3/MX-4, Prolimatech PK-1/PK-2/PK-3, Tuniq TX-2, Gelid GC-Extreme and a few others that I can't recall.
Don't just pick any random paste because some are even WORSE than mayonnaise (yes, mayonnaise works but dont use it unless you want your phone to smell like rotten mayonnaise and I 'think' its electrically conductive).
DO NOT use electrically conductive thermal pastes like Indigo Xtreme & Coollaboratory Liquid Ultra/Pro as they are obviously not good for uses on the phone.
Also because the Indigo Xtreme & Coollaboratory Liquid Ultra/Pro WILL cause corrosion like this https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcSR8rn5Q92qYNmQmAbUJ4zzF5R5VzLsaZ_go1bxk8xfDHIDvWJZ

Now the guide:

Step 1: Take your phone apart using this guide http://www.ifixit.com/Teardown/Nexus+5+Teardown/19016

Step 2: Step 14 at above link shows that square box beside to the left of number 53.
Now clean the square box and the SKHynix RAM( as seen in Step 11 at above link) with and a microfibre cloth to prevent leaving lint as lint affects thermal transfer.
Pour some rubbing alcohol on the cloth an rub the red coloured number 3 and black 'tick' off as the ink might affect thermal transfer as well.
A tissue can be used too but just remember to blow/clean the lint off.

Step 3: (Read this before applying thermal paste http://www.tomshardware.com/reviews/cooling-air-pressure-heatsink,3058-9.html)
Now put thermal paste at the middle of the square box.
The paste has to cover the whole RAM (don't worry the CPU is just directly under it). Do not put too much or little as it isn't good.
Use the pea method like this http://core0.staticworld.net/images/article/2013/01/thermal-paste-thermal-100021574-orig.jpeg but you need to put much more because of the 0.5 mm gap between the RAM and the square box. Just make sure it fills the square box. Then put the RAM back.
It should look something like this when its done correctly (bottom right picture) https://www.dropbox.com/s/vci7uor6xlzt879/dsad.PNG
DO NOT let the paste overflow out of the box. To make sure how, just put the RAM back in place properly then take it out again.
If its too much/little then just add/remove some. To remove the additional paste, just use the microfibre cloth/tissue + rubbing alcohol to rub it away.

Now just put everything back and enjoy the phone that will probably never throttle while gaming :) Oh the thermal paste I used was Noctua NT-H1.

Well that's it. I hope my English is clear & good enough. Please leave a comment if there is anything more that I can add/remove/improve. Also leave a comment if you are unclear or have any questions regarding this.

Just hit thanks if this helped you :)
 
Last edited:

pyj08178

Member
Nov 6, 2013
19
26
Modding pics & stuff used:
 

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Last edited:

pyj08178

Member
Nov 6, 2013
19
26
well i dont want to take apart my phone but nice mod...

btw none of the Pictures is working!!
Fixed for the dropbox ones. The others should be fine.
I only dared to did this because I lost my warranty in the first place by dropping my phone in the water.
It's dried & working already by putting the phone in a ziploc bag with rice + silica gel.
 
Last edited:

WarRaven

Senior Member
May 13, 2007
852
280
I don't see pictures either.
Was waiting for this to be done with this phone.
Now, you should be able to post some crazy antutu scores?

WR

Sent from my Nexus 7
 

WarRaven

Senior Member
May 13, 2007
852
280
I don't see any pics, little white boxes.

You should be able to smoke my score at room temperature.
This is mine, in a warm vehicle, 2.5ghz stock ROM(Art). Was 32c at start I believe.

e5ehajyn.jpg


BTW, I'm not attacking your thread or reasoning, just looking forward to results of this being done, and then used.
As well, what it could be pushed to?

WR


Sent from my Nexus 5
 

pyj08178

Member
Nov 6, 2013
19
26
I don't see any pics, little white boxes.

You should be able to smoke my score at room temperature.
This is mine, in a warm vehicle, 2.5ghz stock ROM(Art). Was 32c at start I believe.

e5ehajyn.jpg


BTW, I'm not attacking your thread or reasoning, just looking forward to results of this being done, and then used.
As well, what it could be pushed to?

WR


Sent from my Nexus 5
What's your PVS number?I don't have any before pics but i remember it was around 20-23k scores before the mod. Its not high but after doing this the phone only feels warm to the touch, not hot anymore. I've seen scores high as 38775 but no matter what I just can't get past 32k. Just fyi I live in Singapore.
 
Last edited:

WarRaven

Senior Member
May 13, 2007
852
280
I'm not sure, can never get it.
I don't under volt so I never bothered.

Yeah, I'm northern Alberta Canada.
Warm right now, unusually nice, means the bad stuff is coming with a vengeance.

Though prior to testing my core read
32c or so.. little lower then normal but not cold. When it's colder then a witch's tit here in February, I'll do a cold test then for yucks.


WR


Sent from my Nexus 5
 

pyj08178

Member
Nov 6, 2013
19
26
I'm not sure, can never get it.
I don't under volt so I never bothered.

Yeah, I'm northern Alberta Canada.
Warm right now, unusually nice, means the bad stuff is coming with a vengeance.

Though prior to testing my core read
32c or so.. little lower then normal but not cold. When it's colder then a witch's tit here in February, I'll do a cold test then for yucks.


WR


Sent from my Nexus 5
Use this to get PVS number http://xdaforums.com/nexus-4/general/poll-cpu-binning-t2052496 .I don't know why but I really can't get anything higher than 32k. Maybe its just my bad luck.
 

WarRaven

Senior Member
May 13, 2007
852
280
OK, pvs2, so nothing special.
Running on elemental, no l2 o/c, only core.

WR

Sent from my Nexus 5
 

pyj08178

Member
Nov 6, 2013
19
26
New link at top of OP for all photos. I can view it fine on chrome, internet explorer and on my N5. Not sure why you guys can't. If still can't, then I'll upload it elsewhere.
 

WarRaven

Senior Member
May 13, 2007
852
280
Updated. See post #2. Put my name on it to show that its done, not taken from somewhere or edited. Mind telling me if the links are fixed?

Them posted fine for my viewing.
First ones tried to post as pics, white boxes appeared instead, now they're links.. just pointing out what I saw.

WR

Sent from my Nexus 7
 

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  • 20
    Try this at your own risk. Warranty is voided (obviously) if you do this mod.
    I will try to add some more useful pics & links in the future.
    More proof will be added if its needed.
    Also this is my first guide so please pardon me and tell me what can I improve on.
    (all photos here if links not working. https://www.dropbox.com/sh/ytidqu7ghvz8x1i/OIXAtT_8Pu)

    Some important info first:

    Phone info:
    My Nexus 5 has a CPU binning of PVS 2 with -50mV undervolt for all clock speeds.
    Running 4.4.2 stock rooted with latest stable Faux kernel.
    Some shots of my Faux Clock settings (no signal in the pictures because i haven't put my SIM card in):
    https://www.dropbox.com/s/gvmolw5vkyisio0/Screenshot_2014-01-29-00-18-24.png
    https://www.dropbox.com/s/h6j0azscvg1qtq3/Screenshot_2014-01-29-00-18-45.png
    https://www.dropbox.com/s/5frslsm9crdi774/Screenshot_2014-01-29-00-18-53.png
    Don't even worry about that 85c limit that I set on picture 1. After this mod it wont even be close to 80c.

    Antutu scores at 2.5Ghz:
    30079 after mod room temperature 25c https://www.dropbox.com/s/lkeu4b9p6dgugan/Screenshot_2014-01-29-07-02-54.png
    31191 before mod at temperature of -4c on a trip at a cold country https://www.dropbox.com/s/vqsilj39q39z12n/Screenshot_2014-01-29-06-14-16.png
    Not the best scores but see the difference in the places tested?

    Temperature immediately after 10 minutes of Asphalt 8:
    (Temperature around the bottom right of the picture)
    https://www.dropbox.com/s/kri8h8hxfxz19pf/Screenshot_2014-01-29-00-46-20.png
    It showed 54c 1 second later but anyway its still cooler than any phone I had before.
    I played until 20 minutes and there is still ZERO throttling. I haven't tried playing any longer though but at 20 minutes its just a little warm, not even close to hot.
    Oh and the room temperature was 25c.

    The Nexus 4 copper block mod http://xdaforums.com/nexus-4/general/hardmod-nexus-4-investigating-thermal-t2144652 isn't ideal because of the smaller gap (1.5mm vs 0.5mm) so yeah.
    WARNING: DON'T follow the way they applied the thermal paste on the N4 mod thread. IT IS WRONG because it will not be evenly spreaded.
    Try to use good thermal paste's like the Noctua NT-H1, Arctic Cooling MX-2/MX-3/MX-4, Prolimatech PK-1/PK-2/PK-3, Tuniq TX-2, Gelid GC-Extreme and a few others that I can't recall.
    Don't just pick any random paste because some are even WORSE than mayonnaise (yes, mayonnaise works but dont use it unless you want your phone to smell like rotten mayonnaise and I 'think' its electrically conductive).
    DO NOT use electrically conductive thermal pastes like Indigo Xtreme & Coollaboratory Liquid Ultra/Pro as they are obviously not good for uses on the phone.
    Also because the Indigo Xtreme & Coollaboratory Liquid Ultra/Pro WILL cause corrosion like this https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcSR8rn5Q92qYNmQmAbUJ4zzF5R5VzLsaZ_go1bxk8xfDHIDvWJZ

    Now the guide:

    Step 1: Take your phone apart using this guide http://www.ifixit.com/Teardown/Nexus+5+Teardown/19016

    Step 2: Step 14 at above link shows that square box beside to the left of number 53.
    Now clean the square box and the SKHynix RAM( as seen in Step 11 at above link) with and a microfibre cloth to prevent leaving lint as lint affects thermal transfer.
    Pour some rubbing alcohol on the cloth an rub the red coloured number 3 and black 'tick' off as the ink might affect thermal transfer as well.
    A tissue can be used too but just remember to blow/clean the lint off.

    Step 3: (Read this before applying thermal paste http://www.tomshardware.com/reviews/cooling-air-pressure-heatsink,3058-9.html)
    Now put thermal paste at the middle of the square box.
    The paste has to cover the whole RAM (don't worry the CPU is just directly under it). Do not put too much or little as it isn't good.
    Use the pea method like this http://core0.staticworld.net/images/article/2013/01/thermal-paste-thermal-100021574-orig.jpeg but you need to put much more because of the 0.5 mm gap between the RAM and the square box. Just make sure it fills the square box. Then put the RAM back.
    It should look something like this when its done correctly (bottom right picture) https://www.dropbox.com/s/vci7uor6xlzt879/dsad.PNG
    DO NOT let the paste overflow out of the box. To make sure how, just put the RAM back in place properly then take it out again.
    If its too much/little then just add/remove some. To remove the additional paste, just use the microfibre cloth/tissue + rubbing alcohol to rub it away.

    Now just put everything back and enjoy the phone that will probably never throttle while gaming :) Oh the thermal paste I used was Noctua NT-H1.

    Well that's it. I hope my English is clear & good enough. Please leave a comment if there is anything more that I can add/remove/improve. Also leave a comment if you are unclear or have any questions regarding this.

    Just hit thanks if this helped you :)
    6
    Xda is my blog =p

    I stay in malaysia 25C~35C depending on weather.
    -Stock rom @ Stock GHZ @ Stock Vol
    -r32 franco kernel
    At first, I thought my antutu score was so terrible, getting 23k~25k. Then I does a quick search and realize it was thermal throttled.
    I got annoyed with the low score. (U know the feeling when u have the almost same spec as note3 and getting low score)
    40~60C on normal usage, 77C max when running antutu.

    So I decided to void my warranty, and deal with the s800 heat problem.
    I applied 3W/mk 1mm thermal pad, and the result was good. Got 27K~28K. The screen was slightly hot to use. Not comfortable when keeping in pocket after usage. 40C~58C on normal usage, 66C max when running antutu.

    After 3days, I got frustrated with the heat on the screen everytime I use. The heat was so hot and I worried the screen might fail over time.
    I thought maybe thermalpad wasn't a really good conductor and collecting too much heat.
    So I change from thermal pad to 0.5mm Copper plate. I applied thermal paste between s800 and copper plate and nexus5 frame.

    s800|#|Cu|#|Nexus5

    legend: ('# = thermal paste'),('Cu = Copper')

    The result of antutu was great! 29k~30K. 30999 was the highest I get.
    But then I got more frustrated and worried with the heat on the screen. It is not even optimal temperature for the IPS screen to work properly.
    40~60C on normal usage, 65C max when running antutu.
    The frame was a good collector of heat, but a very bad heat dissipator, it got very hot on the screen after long use and it actually reached 65C
    for just surfing websites with chrome. 30min of surfing on forums only, no java/gif/flash/watever****s.

    I used to be an overclocker on PC, and 60C is a very sensitive limit to me. I feel very sad that Nexus5 is very bad with thermal control that it actually sacrifice s800 performance to overcome the thermal issue. So in the end I took out the copper plate and clean up the thermal paste.
    It actually feels better for daily usage where no thermal paste/pad/ copper plate is applied to the frame.

    Lesson of nexus5
    1) Forget about the benchmark. Nexus 5 score will not able to beat other s800. Unless you live in freezer or somewhere cold.
    2) God created us, He knows us best. Have faith in the thermal throttling, LG knows nexus5's best
    3) Nexus5 is not a heatsink, the frame is not for heat dissipation, it is a big heat collector.
    4) Nexus5 is easy to disassemble.

    I voided my warranty for this lesson. (It was fun anyway, I like to disassemble things)
    But no sticker nor watever pin that shows I've opened up my unit.
    So yup... still got chance for warranties next time. (Probably changed new phone by that time)
    4
    Do it

    I know this is an aging thread, but I thought I'd share some additional info, as I just did essentially this same thing to my Nexus with great results. Unfortunately, I did not see this thread before starting, if I had I would have taken baseline screen temperatures, since an increase there seems to be a concern. But, you'll see post-mod temps below.

    Maybe it varies phone-to-phone, but there was NO thermal compound on the chip to start with, and it does not make contact with the metal frame directly above it. The chip is essentially insulated by air-gap, rather than sinked. Can't imagine why this was done, as it basically subjects the chip and adjacent components to very high temps, instead of subjecting the whole phone to moderate temps.

    Can't see most of OP's pictures, and you may be able to guess why I couldn't take any pictures during the process, but it's really simple. There is a square indent in the frame where the main chip sits; I put a layer of thick copper foil in this to fill the air-gap. Then I put thermal compound on the main chip, as well as a thin layer on the metal shield surrounding it, as this shield contacts the frame. Also put a thin layer on the SIM holder, as this also touches the frame and may pull some heat away from other components (mostly was thinking of the flash LED when in torch mode, as it's directly opposite).

    I ran Stability Test's classic test for 15 minutes to see before/after, with System Monitor running in background-process mode.

    Before thermal treatment:
    @5:00 - 40 successful runs
    @10:00 - 74
    @15:00 - 107
    CPU temp leveled out at 80c pretty quickly

    After Treatment:
    @5:00 - 50 successful runs
    @10:00 - 90
    @15:00 - 131
    CPU leveled out at 73c

    Running Linaro kernel, so throttling is not stock. Ambient temp was 20c for both tests. According to IR thermometer, screen temp leveled out at 36c (at the top, bottom of screen is cooler) after the treatment. So, this mod results in heat being transferred to the whole phone, but the temps are not enough to damage anything, and will result in a much better environment at the main chip and surrounding components.

    There you have it; ~20% increase in sustained work capacity for about 30 minutes of work. And yes, my Antutu score increased as well, but we all know we shouldn't care about that...
    3
    Modding pics & stuff used:
    2
    So, I first made it by just applying thermal paste between screen and processor. I noticed that the temperatures were really stable, and of course, the screen was getting hotter, but not as much to bother me. So, after that, I decided to open it and put a small metal piece between the screen and the processor, but, I let a small bended part of it out of the square, so the metal piece dissipates heat by air too. Conclusion: It's even better than before and I got 44300 on antutu with thermal throttling off, stock frequency, the temperatures are much stable and low now, and, the screen is not getting as hot as before. The temperature rarely gets over 60°C with heavy use such as games. With normal use with apps like facebook and tapatalk it stays between 40°C and 44°C.
    a2be587a90a0fbaf5176855cb01f1d3b.jpg
    e35c7904f4d766aafc5ddf0bf114bd9a.jpg
    75fac653114cc7573224faece7bbcc95.jpg