[Nexus 5 General] pyj08178:
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 :)