yashsingh1/xdaforums huggingface dataset:
[Galaxy Tab S General] Bigdrago:
Ok. I just found the los20 to be so fast :)

It passes safetynet with magisk + module and netflix etc is working.

Maybe i'll try los 17 a few days to test
[Galaxy Tab S General] iyenzel:
Any bug u encounter so far? Is it stable for daily use?
[Galaxy Tab S General] Bigdrago:
I dont use it that much. But the kids use it for netflix etc. Working fine.
[Galaxy Tab S General] dave678:
I'm still using it on Kitkat
[Galaxy Tab S General] louis_alphons:
I got this tablet recently. First time when I used the charger, I belived it's something wrong with charging...because I was expecting at over 2 Amps in Ampere (instead 1,..).

Yesterday I saw in Deathly Adiutor, the battery settings - Screen On Current Limiter. As soon as I unchecked that default settings, the charging current jumped to 2.5A.

So, by default, if the screen it's on, it will charge almost twice longer as time.
[Galaxy Tab S General] nauvho:
I can't say anything about the battery really, i use mine 98% of the time plugged in the charger, but it is interesting that for 5 years sitting 24/7 on charger, the battery still works flawlessly.
[Galaxy Tab S General] Marian94:
I'm about to buy a tab s 10.5 T805 with 76$ used,how about screen burn?

And I made this mod(cooper pads 1 mm) on samsung tab 3 10.1 and really improve the performance, before this mod on 720p videos has very lagy and after will play with minim lag

I can't load the photo with xda app :(
[Galaxy Tab S General] nauvho:
What do you mean by "screen burn" ?
[Galaxy Tab S General] Marian94:
Look on google "amoled screen burn in"

Only minus on amoled screens is that after time if you use maxium brightness and static wallpapers the icons from programs will remain permanent like a shadow where they was.

Most of the time that can be seen on white backgrounds.

Look on google play for " burn in check" and test it please :)

That deal with T805 not going to happen :(

But I still get a T800 with same money and I check and the screen amd seller says the battery is new(but I dont think)
[Galaxy Tab S General] gattupo:
Hi, I read your post really interesting cause I'm searching about performance of my T805. I try to test it with Throttle and I have 35-30GIPS. Not bad but not like yours.

My temp CPU maybe is not coorrect bucause after 10 min is never above 29°C also if it never burn.

I don't have root on Lineage 14.1 but I can do it.

- Do you suggest me to try with thermal pad and modify frequency?

Sorry but I don't understand procedure to modify frequency and undervolting. Can you explain in specific for a noob?

- And can you link me a guide to root?

I would like attach my config and my result but I can't yet.

Version Lineage: 14.1-20190127-NIGHTLY-chagalllte

Thanks
[Galaxy Tab S General] nauvho:
hi there,

1. CPU temp should be monitored with dedicated app like deathly auditor, not with the throttle test app (temp in this app does not work correctly).

2. Do not do any hardware modifications until you know you need them.

3. Yes frequency and voltage is recommended first step. There is nothing to explain really, you watch my video and do the same settings from the video in your deathly auditor, if your cpu temps allow more or less, the point is your cpu not to throttle down due to high temps.

4. Lineage that I have linked in my first post is rooted you don't need to do anything except enabling it in the developer menu options and it comes with build in deathly auditor.
[Galaxy Tab S General] louis_alphons:
so that's the jump from MM (25GIPS) to 7.1 (30-35GIPS); after that, you have to use max + min CPU freq 1600MHZ + undervoltage...and thermal pads

didn't knew that Lineage: 14.1-chagalllte..has a built in devop root. I installed SuperSU from trw, but now I can see that option in dev op :D
[Galaxy Tab S General] benoitb85:
On lineage Deathly, not doing any tweaking I have 42-43 GIPS after 3:30 of CPU throttling test. I guess I have nothing to win then.
[Galaxy Tab S General] nauvho:
Nice.
[Galaxy Tab S General] gattupo:
Hi and thx for help.

After some work I installed Deathly Lineage 14.1 but I need to install AddSU because stock OS allow me only to root by ADB. However now I'm ready and I'm trying to set frequency and voltage.

I watched your video and I saw you have 1087mv in 1600Mhz (-35). Instead I have 1062 at 1600Mhz, so if I put 1087mv it grow +25, not go down. (I have 1087mv on 1900Mhz first time I opened Deathly Adiutor)

Why?

Then, in minum CPU frequency is right the same value of 1600?

However with 1600 for Min and Max and 1087mv voltage I go down with performance. My temp that in stock is 82-87°C go down on 45°C but GIPS go down from 35-39 to 30-35.

Sure my temp is high and I think I can go better with thermal pad (today maybe they will arrive), but I don't understand how to set voltage cause it's different by you.

What you think?
[Galaxy Tab S General] nauvho:
Why your stock voltages are different? voltages are different in every CPU, not by much but they differ as the silicon of the chip is different, this is just the silicon lottery, some chips are better then others , but that's not important.

Regarding the frequency i have explained it couple of times now in this topic, its not about being at 1.4, 1.6 or any specific frequency,

its at what maximum frequency your CPU does NOT throttle down due to high temps and its stable at this temp

.

So your specific frequency quite normal could differ from mine, you have to test, start by going at 1.5, 1.6, 1.7, 1.8 and so on until you see the temp goes at 92-95 and it throttles CPU frequency down, then reduce a bit, and in this way you will find your maximum stable frequency and set it. You want your device to not go over 90C from 5 min test, that's your frequency, if it goes higher then 90c, you need to lower frequency, if its 70C you can increase your frequency.

Its the same with under voltage, you don't need to do it at specific number, i do it because under voltage lowers CPU temp a bit, you can play with this settings reasonably and find the best for your particular device, just make sure while testing DO NOT to let deathly auditor to apply settings on boot, as if the device crash , you want to be back at stock when you boot, otherwise you might get in trouble, once you finish testing then you can set apply settings on boot.

CPU Throttle test app performance is not very accurate too, so those GIPS numbers you should take with grain of salt, as thumb of rule, the higher the frequency, the better the performance will be.

To measure actual device performance as i said already, use 3D mark app and run the tests from my screenshots. Use CPU Throttle test app only to check if the CPU is throttling down and to monitor CPU temp (in deathly auditor) while its running.
[Galaxy Tab S General] lodbldbol:
I'm running RR Android 7.1.2 on my T700, I don't have voltage control but I still managed to get similar performance using thermal paste. Thanks for the guide!
[Galaxy Tab S General] nauvho:
nice
[Galaxy Tab S General] Marian94:
I receive my T800

The battery is new but is from china

The seller not telling me that tablet random restart.

I check the internal cables(flex) all was ok

I resolder the battery conector on motherboard and same.

I even try tab 3 10.1 battery and she don't start

I forgot flux on battery conector and when I connect thr battery i saw smoke, was working after but only connected to charger

Now nothing :(
[Galaxy Tab S General] Marian94:
Well now is working only connected to the charger

And not charging, the battery is stuck at 7%

If I disconnected the charger is dead

I think I fry the power IC chip?
[Galaxy Tab S General] gattupo:
Thanks a lot for your help.. Today I did some work, I used thermal pad 0.5 and with 3x (1.5mm) finally I saw drop of temperature.

I was extra happy, I set 1700Mhz and -30mv offset for voltage and I obtained amazing value of 50GIPS for entire test, without throttle and temp about 85-88

But in afternoon situation changed, I don't know why. So I'm trying other values to discover perfect setting but after 2-3 mins GIPS drop down to 29-30 from 44-45. I set same values again but I'm not able to see that huge values again.

Strange thing is that this drop happen despite temperature is under 80°C.

Thermal pad work well, in fact situation is the same if I push or not under the camera on cpu that indicates the contact is good, but I'm not able to have more than 38GIPS now, exactly like before apply them.

You told me to try undervolting but I don't know how much I can push down. I tried until -50mv with -5 steps but nothing change. What do you suggest? Can I try more? Is it right work with Offset (for all frequences) or you work different for every of them?

Rather I found differences with Thermal Panel, I'm not able to go up until 90°C, in every condition I set.

Sorry for all my questions, you are my light for try using this table again!! :)
[Galaxy Tab S General] nauvho:
As I said previously couples of times, DO NOT use CPU throttle test app GIPS for performamne measurements or temp meruments, use 3dmark for benchmarks. Use cpu throttle app only for throttle test nothing else, and this is the last time I would say that :)

Also when you do performance benchmarks you need to close all apps and even stop all background activities, otherwise android can do updates or do anything else in the background and ruin every benchmark. And as I also said pre previously the higher the max cpu frequency without throttling due to temp, the higher performance would be. Ofc you would also have to keep in mind battery life too.

I would suggest to not udervoult over 0.35 unless you do extensive test on the stability. You don't need to undervolt if your temp is under 90c and cpu don't throttles. Undervolting only helps temps nothing else.
[Galaxy Tab S General] gattupo:
Thanks, you right.. You told it some times :rolleyes: but there are a lot of variables to consider and my english is not so good. I'm really doing a great experience in this field thanks of you.

However, now I found a stability and I think I can be happy for this.

The main problem for me was the Thermal Panel (thing that I underestimated) on Deatly Adiutor. When I grand +5°C for 1700Mhz (85 to 90) the throttole test passed correctly (15mins at max values).

Obviusly making super attention on downvolting. I learned how much important are only 5mv different!!

I hope I will not disturb you more and I thank you so much. I would like to offer you a beer :-:o

Bye :good::good:
[Galaxy Tab S General] nauvho:
Thank you and I am glad that is working for you and it is bringing new life to those tablets. I am sure that Samsung won't be happy if we use those tablets happily for 10 years :D
[Galaxy Tab S General] fer1805:
Super!!!!

Thank you for this! This looks promising!!!!. I’ve had this tablet since it came out, last year it did update to Android 6.0.1 and now it is very slow, usable but slow. After watching your video and seen the performance, you have motivated me to try this. I use my tablet every day for 1 hr at least, I use google docs and sheets, web browsing for research, Netflix, Emby, VLC, Kindle app. I wonder if these apps are supported by Lineage OS – I’ll do some research to find out if others have tried these. I’ll keep you updated for the benefit of others trying to do the same thing.

Update: I know the following will generate controversy.... I did my research and to get some of the apps I use on Lineage OS seem to require a lot of trial and error. I read somewhere that using customs roms is a life style, and that's okay if you have lots of time to spare in front of a tablet and entertain yourself just getting it to do the stuff you need it to do, but I'm not willing to spend hours / days trying to figure it out. I guess that for me the life of my Tab S has come to an end, and it is time to get a recent tablet. Hopefully I'll find a good discount after Xmas period, I'm also open to explore 2nd hand options of tab S6. Happy holidays to all the readers.
[Galaxy Tab S General] nauvho:
Hi there. I think you have some misunderstanding, all the apps from the store are working as on the stock, there is no difference or extra steps for that, idk what you have read but I have never seen compatibility issues with any app from the store.

Custom firmware, tweaks and mods are by default for power users, who have the knowledge, the passion and the patience to do all that. They enjoy tweaking and discovering how the tech works and what can they do with it.

Regulars users on the other hand, just want to get job done without thinking about it. If you are regular user and you lack the experience and knowledge or patience, I suggest you to stay away from mods, tweaks and custom firmware.
[Galaxy Tab S General] :
Fcuk samsung, they should make all drivers opensource as required by GPL. They circumvent the GPL and parasite on open-source software the work of linux developers.
[Galaxy Tab S General] fer1805:
I couldn't agree more with you, although I've done more research and I may be installing Lineage OS. I used to root, backup, and install roms a few years ago when the Samsung phone S2, S3, S4 was around. This might be interesting to do it on the tablet. If I break the tablet, I'll head to the store to buy a new one :D

Update!!! :) :) :) :) Lineage OS 14.1 installed, tablet rooted using CF-Auto-Root, CPU and GPU mods done as suggested. This feels like a new table, runs so smooth and I like SO much. You are a genius.

The only thing to noticed is audio is a bit glitchy when I move between apps. I'll dig a bit more and see what can be done to fix the audio.

Thank you SO much :)
[Galaxy Tab S General] fer1805:
Question for those who have followed this modification, how long is the battery lasting? I know it is a broad question and depends on usage, for example in my base I left the tablet in idle over night and battery drained about 30%.
[Galaxy Tab S General] nauvho:
Its already being discussed previously read, but in general, you have to lower the minimum CPU and GPU frequency in order to increase the battery life. Minimum CPU and GPU frequency won't effect overall performance, but you may have initial animations and apps launch be more choppy. Default one is 500mhz and its fine, altho i use 900mhz as my minimum for daily use.
[Galaxy Tab S General] :
I give you one month, then you will revert to stock.
[Galaxy Tab S General] fer1805:
I just did, I went back to stock.

- I couldn't fix the audio issues. People reported similar issues, some could resolve it, others couldn't.

- Apps closed randomly.

- Battery drained itself in standby mode using the tweeks proposed on this forum., and With the tweeks disabled the battery wasn't much better compared to stock.

- also without the tweeks I feel performance is better with stock rom, lineage was pretty much hit and miss.

[emoji4]
[Galaxy Tab S General] louis_alphons:
you don't "feel" performance. performance is given by the apps which measure it. 100-150% boost in performance is real. ;)
[Galaxy Tab S General] nauvho:
Apparently you have no clue what are you speaking or doing, you can't even understand what is this topic about and what to do, no offence. Stay away from mods and stick with the stock, I think its the best for you. This topic is about how to improve the cooling of the device and increase CPU performance. I'm not giving any "Cookie cutter" or "suggested" tweak settings, I simply demonstrated my performance boost and my settings and I have explained very well exactly my goals and what I am after. To find the best settings specifically for your usage and device, is your job. Performance is messured its not "feeling". What android builds or apps you are using or have issues with, has nothing to do with this topic.
[Galaxy Tab S General] fer1805:
Dude, you need to chill.
[Galaxy Tab S General] nauvho:
I'm calm, but I hope you stop writing nonsense.
[Galaxy Tab S General] kekerosberg:
Thanks for the great idea nauvho. I got excellent results with tweaking only and even better with a 2x2 cm thermal pad cut and applied to strategic places. Should have done this a lot sooner.

CPU Voltage -75 mV global

CPU 250-1900MHz (stock)

CPU Thermal 70C 1900MHz

CPU Thermal 80C 1900MHz

CPU Thermal 85C 1800MHz

CPU Thermal 95C 600MHz :eek:

GPU 100-600MHz (stock 100-533MHz)

These settings are perfect for me as I rarely do anything CPU intensive for extended periods. I am able to maintain 1900MHz for at least one minute without throttling which is suitable for my daily use. 2000MHz was not stable even with a little added voltage.

Running on LineageOS deathly 14.1.20191123, standby battery loss is 1% per night ~8h. WIFI and BT enabled, no programs in the background.
[Galaxy Tab S General] nauvho:
Nice, glad to hear, i still think to try with copper heat pipe tho :) maybe 1900-2000mhz would be possible without throttling
[Galaxy Tab S General] bluess57:
Any idea what the black lining material is, lining the inside of the back cover (first thumbnail picture)? Is it actually heat conductive

Ok google search, Thermally Conductive Material, might be like this:-

"https://au.element14.com/panasonic/eyga091201f/thermal-interface-film-pgs-10um/dp/2577400"

I've just resurrected a T805 and got LineageOs 14.1 vanilla on it. Thinking I'll crack the back cover open and add some thermal pads.
[Galaxy Tab S General] nauvho:
Its thermal conductive tape adhesive of some sort. Only Samsung knows exactly. High quality smartphones and tables i know use Graphite or Carbon thermal tapes, altho they are expensive, i don't know about this specific one, but It looks like similar to this one here or this one

You should check your CPU temps and if its throttling down first before adding pads.
[Galaxy Tab S General] chrisjs19:
Thanks for the really helpful work nauvho.

It would be interesting to know what pad specification (source, type & thermal conductivity) you and others are using as there is quite a wide range of thermal conductivity available from around 1 W / MK to > 10 W / MK. I like the look of this item as the performance is quite good and there is a selection of thicknesses - https://www.amazon.co.uk/ADWITS-Thermal-Conductive-Silicone-Conductivity/dp/B07X38254H

Details of your heat pipe construction also appreciated.
[Galaxy Tab S General] kekerosberg:
1900 MHz might be possible without any throttling but i think the problem with 2000MHz is not the heat. I got immediate errors with 2000 MHz on a cool system.

Maybe the power supply is inadequate for these frequencies or maybe I just hit my chip's limit, who knows.

Good luck with the mod anyway!
[Galaxy Tab S General] louis_alphons:
Does anybody uses this config to play games?

I gave the 5 year old kid a tablet to play talking tom gold and the game shuts down randomly. I installed another talking tom and it is not playable, it also shuts down randomly.
[Galaxy Tab S General] nauvho:
The ones i used are around 5.5W/MK i think, standard memory ones i had laying around. Otherwise i have seen up to 40W/MK and in general the higher the better. About the heat pipe, I'm thinking to use flat 0.3mm to run thru all radiators (CPU, GPU and memory) and connecting down with the heat pad on the back cover.

You need to give more voltage at higher frequency, just like with PC overclock :)

Try different game, or best run 3d mark in stress test mode continuously for like 2 hours (on power supply) to check if your hardware is stable.
[Galaxy Tab S General] chrisjs19:
Thanks nauvho. So I presume standard silicone (electrically insulating) type. As you say, the higher the better but the very good stuff (> 30 W/mK) all seems to be carbon based and electrically conducting so much greater care with size and placement would be required. This review was helpful and points to a couple of brands of insulating silicone pads at 17 W / mK: https://graphicscardhub.com/best-thermal-pad/
[Galaxy Tab S General] hornetoli:
Dear nauvho or other experienced users,

thx a lot for that guide - i tried on my T800 and so see temperature drop of ~10° when applying softly preassure while test run.

So I think appliance of thermal pads could help to push upper frequency limit a bit higher to ~1600MHz as suggested.

Now a question for the pads size - can you give the rough outer dimensions of the applied pads? I am thinking of either soft

pads or solid copper ones with 0.5mm and 1mm(CPU) thickness. But would need the outer dimensions since I could by them already

in propper size withoutz the need of cutting (especially the copper ones ...).

Are they 10x10mm?

Thx!

Kind regards, Oli
[Galaxy Tab S General] chrisjs19:
Sorry Oli, dont know - I am waiting for a new battery and time to fit it, along with making some thermal improvements at the same time.
[Galaxy Tab S General] nauvho:
Ok i found the info on my pads as many questions about them, they are "standard" memory pads, here are the specs

OEM Thermal pad TC550 - 15 x 15 x 0.5mm - 5.5 W/mk

Specifications

Construction & Composition ---- Silicone & Ceramic filled ----

Color ---- Light Blue Visual

Thickness 0.5 mm

Hardness Shore C 25

Density g/cc 2.7

Tensile Strength KN/m 0.3

Elongation % 64%

Continuous Use Temp -40 to 150

Breakdown Voltage Kv/mm 5.0

Volume Impedance ohm-cm 1.1*1016

Dielectric Constant 1MHz 7.15

Weight Daminify ---- 0.3 at 150 240H

Flame Rating ---- V-0 UL 94

Thermal Conductivity W/m.k 5.5

UL, RoHS, REACH ---- Compliance ----

OEM Thermal pad TC550 - 15 x 15 x 1mm - 5.5 W/mk

Specifications

Construction & Composition ---- Silicone & Ceramic filled ----

Color ---- Light Blue Visual

Thickness 1 mm

Hardness Shore C 25

Density g/cc 2.7

Tensile Strength KN/m 0.3

Elongation % 64%

Continuous Use Temp -40 to 150

Breakdown Voltage Kv/mm 5.0

Volume Impedance ohm-cm 1.1*1016

Dielectric Constant 1MHz 7.15

Weight Daminify ---- 0.3 at 150 240H

Flame Rating ---- V-0 UL 94

Thermal Conductivity W/m.k 5.5

UL, RoHS, REACH ---- Compliance ----

With that said, i think any general pads like this around 10-15mm and around 4-6W/mk will work.

If you have spare you can test with bigger and better ones if would bring meaningful improvements.
[Galaxy Tab S General] kekerosberg:
2000MHz at +50mV seemed to work but there is no point in that because of the heat. Keep in mind that lower frequencies are stable at -75mV.

I only had a 2*2cm 1mm pad but it would definitely not hurt to have more to spread around.

I am unable to provide a link due to XDA rules, but I used "[Alphacool] 1MM Wärmeleitpad 20x20mm Eisschicht 17W/mk→Sarcon XR-m ThermalPad" from eBay at 10€.
[Galaxy Tab S General] hornetoli:
Dear nauvho & kekerosberg,

thx a lot for your replies and help.

Based on your recommendations and cost considerations, I plan now to order and apply the following:

- 1x [Alphacool] 1MM Wärmeleitpad (thermal pad) 20x20mm "Eisschicht" 17W/mk on CPU

- 3x [Alphacool] 0,5MM Wärmeleitpad (thermal pad) ~15x15mm (custom cut) "Eisschicht" 17W/mk on other areas as per your picture

All together is about 22€ on ebay incl. shipment. So worth a trial for me.

Will see how that works out!

Kind regards, Oliver
[Galaxy Tab S General] Marian94:
I just receving my T800 motherboard from china

I wants to apply some cooper pieces similar like thermal pads that you have with thermal past and don't work, the cooper pads not stay secure...

Some advice?

Now I don't have PC to instal new rom, i'm on android 6...

---------- Post added at 08:17 PM ---------- Previous post was at 08:11 PM ----------

Nauvho

My motherboard I see heats up only on cpu(between charging flex and battery connector)

Why you place on LTE chips and in right ?

And can you tell me if you instal Ampere, charging mAh how is show?

Mine jumping from 20mAh to 80, 200, 600,550 mAh

I instal ampere on pocophone and show stabil charging curent