Database Users

Post your Undervolt Settings here

Ok I did this for my Xoom and got much better battery, so I also applied this to my wife's Galaxy S2. Here we go.
Governor: Smartass2
Clock Speeds:
1400mhz - 1275
1200mhz - 1175
1000mhz - 1075
800mhz - 1025
500mhz - 850
200mhz - 800
This is where I am at so far on my settings stable. Post what you have and maybe we can find a happy medium with these chips to help battery life out for our phones and roms.
I can also upload the SetCPU saved voltage settings also if requested.

Governor: ondemand
Clock Speeds:
1400mhz - 1275
1200mhz - 1175
1000mhz - 1075
800mhz - 975
500mhz - 875
200mhz - 825
If I try to decrease the last 2 clock voltages 25mv more it crashes.

Might help if you post what kernel and ROM your currently using!
Im trying to find some nice voltages for Stock 2.3.5 and Siyah 1.7.7 kernel

I use stock rom MUGKG2 2.3.3 (Canada rom) and Ragemod U1 v1.1b kernel.
my phone sometimes crashes also but I don't care much since my battery life is very good. I achieve 20h average battery life.

Undervolt settings.

Im looking for stable undervolt settings I have currently mine set at
1600 Mhz - 1400 Mv
1400 " - 1300 "
1200 " - 1250 "
1000 " - 1175 "
800 " - 1050 "
500 " 950 "
200 " - 850 "
100 " - 825 "
My settings are stable but maybe someone can put out where I can still undervolt and retaining stability.
Im using stock + Siyah Kernel.

I'm not trying to be rude, but it's a bit useless since not every devices can handle the same settings...
And of course you can still undervolt. You will find YOUR best settings when you're at the lowest values and your phone is still stable. If you're going too low, you'll have to reboot the phone and set the voltage a bit higher.
But if you want an idea, mine is running rock solid with these settings :
100MHz @ 825mV
200MHz @ 825mV
500MHz @ 850mV
800MHz @ 950mV
1000MHz @ 1050mV
1200MHz @ 1150mV
I'm also on stock KI8 + Siyah 2.0b6

Keep trying by 25mV
Siyah Kernel
Cognition 1.5.1
100Mhz @ 775mV
200Mhz @ 800mV
500Mhz @ 825mV
800Mhz @ 950mV
1000Mhz @ 1050mV
1200Mhz @ 1150mV
1400Mhz @ 1275mV
1600Mhz @ 1350mV

What exactly constitutes stable? Half an hour on a stability test? 1 hour? 2 hours? a month?

jayquinten510 said:
What exactly constitutes stable? Half an hour on a stability test? 1 hour? 2 hours? a month?
Click to expand...
Click to collapse
Stability Test is crap. Play a game for an hour to see if it's stable.

ithehappy said:
Stability Test is crap. Play a game for an hour to see if it's stable.
Click to expand...
Click to collapse
Haha, normally I would, but my HSC exams start tomorrow :/ Last school exams ever! Hopefully will get me into uni. I was just running stability tests in the background when I was studying, but maybe I will leave it till after the HSC.

skuizy said:
I'm not trying to be rude, but it's a bit useless since not every devices can handle the same settings...
And of course you can still undervolt. You will find YOUR best settings when you're at the lowest values and your phone is still stable. If you're going too low, you'll have to reboot the phone and set the voltage a bit higher.
But if you want an idea, mine is running rock solid with these settings :
100MHz @ 825mV
200MHz @ 825mV
500MHz @ 850mV
800MHz @ 950mV
1000MHz @ 1050mV
1200MHz @ 1150mV
I'm also on stock KI8 + Siyah 2.0b6
Click to expand...
Click to collapse
Good setting....i'm using without problem from 3 days.
Question:
Do you set governor from 100 to 1600mhz or standard 1200?

ithehappy said:
Stability Test is crap. Play a game for an hour to see if it's stable.
Click to expand...
Click to collapse
CPU stress test in setcpu is a goodone. USing the two cores completely for testing, most of the games make use of GPU a lot and some CPU, so playing games alone wont help you in testing the stability.

Share Your Rom Score

Guys ! please share to us about your DHD detail as below so let us can review and make a choice ! thk
DHD info:
ROM: Android Revolution HD™ 6.1.2
KERNEL : RCMIX3D_v7_OC_UV_2WCR_EXT4
RADIO:12.62.60.27U_26.13.04.19_M
Clock Speed MAX : 122 MHZ
Clock Speed MAX: 1152MHZ
Governor : ondemand
Scripts :KickAss Kernelizer + V6 Supercharger
Benchmark Score :
Quadrant : 1876
Antutu : 3675
Lin Park Single : 36.75
Lin park Multi : 34 . 25
Battery Life : 9 - 12 hour
thk !

Glad to!
DHD info:
ROM: CyanogenMod 7.1
KERNEL : LordMod 8
RADIO:12.54.60.25U_26.09.04.11_M2
Clock Speed MAX : 245 MHZ
Clock Speed MAX: 1516 MHZ
Governor : brazillianwax
Scripts :none
Benchmark Score :
Quadrant Advanced Total : record is 3500+, on daily basis it's 3100+ (3163 today test)
Quadrant Standard: 2863
Antutu: 3023
battery will last one and a half a day

ROM: BlackICEv1.00
KERNEL : LordModUE v7.6b11 BFS
RADIO:12.56.60.25_26.09.04.28
Clock Speed MAX : 122 MHZ
Clock Speed MAX: 1152MHZ
Governor : ondemand
Quadrant: 2601
Antutu: 2857

ROM: Cyanogenmod 7.1.0
Kernel: 2.6.35.14-LorDmodUE-8.0-CFS+ (Undervolted -50 mV)
Min Clock Speed: 230 MHz
Max Clock Speed: 1152 MHz
Governor: OndemandX/Brazilianwax (change every now and then)
Quadrant Benchmark: 2711
Antutu - 2860
Battery - Between one day and 48 hours

haerigrek said:
Glad to!
DHD info:
ROM: CyanogenMod 7.1
KERNEL : 2.6.35.14-cyanogenmod-g9e5cdf1....blablabla (default one)
RADIO:12.54.60.25U_26.09.04.11_M2
Clock Speed MAX : 245 MHZ
Clock Speed MAX: 1516 MHZ
Governor : ondemand
Scripts :none
Benchmark Score :
Quadrant Advanced Total : record is 3500+, on daily basis it's 3100+ (3163 today test)
Quadrant Standard: 2863
battery will last one and a half a day
Click to expand...
Click to collapse
NICE Battery Life !!! Let exchange Battery

boobootalk said:
NICE Battery Life !!! Let exchange Battery
Click to expand...
Click to collapse
Yeah I still have to recharge it every night so that I won't run out in the middle of the day. Comforting fact is that if I forget, it won't be empty in the morning.

ROM: CyanogenMod 7.1
KERNEL : 2.6.35.14-cyanogenmod-g9e5cdf1
RADIO:12.54.60.25U_26.09.04.11_M2
Clock Speed MAX : 245 MHZ
Clock Speed MAX: 1209 MHZ
Governor : ondemand
Scripts :none
Benchmark Score :
Quadrant Standard: 2970
AnTuTu: 3189
Battery 2 days with normal use. That means some browsing, 3 hours of music, sync mail and updating apps through the market.

Bestevaer said:
ROM: CyanogenMod 7.1
KERNEL : 2.6.35.14-cyanogenmod-g9e5cdf1
RADIO:12.54.60.25U_26.09.04.11_M2
Clock Speed MAX : 245 MHZ
Clock Speed MAX: 1209 MHZ
Governor : ondemand
Scripts :none
Benchmark Score :
Quadrant Standard: 2970
AnTuTu: 3189
Battery 2 days with normal use. That means some browsing, 3 hours of music, sync mail and updating apps through the market.
Click to expand...
Click to collapse
welldone mate ! your score is dam good ! and ur battery life is awesome ! let exchange ur phone with my DHD

boobootalk said:
welldone mate ! your score is dam good ! and ur battery life is awesome ! let exchange ur phone with my DHD
Click to expand...
Click to collapse
Just strip it to the bone!
Now waiting for ICS and hopefully if will become butter smooth as well...

DHD info:
[Rom]BlackICEv1.01b5
[Kernel] LordModUE-8.1-BFS-b5+ OnDemandX
[Radio] 12.62.60.27_26.13.04.19_M matching Ril HTC-RIL_2.2.1 1003G
Min Clock Speed: 122 MHz
Max Clock Speed: 1152 MHz
Governor: OndemandX

First, this would be interesting if we could all test the roms at the same cpu speed and the same governor. Otherwise, it's a bit difficult to keep track.
Tested the new Blackice 1.10 vs CyanogenMod 7.1.0
Procedure:
- Factory reset, wipe all, flash full wipe 1.5_ext4.zip
- Install rom
- Install Antutu and Quadrant
- Check CPU settings in cyanogen performance settings
- Reboot
- Run Quadrant 3 or 4 times, then reboot, run 2 times more.
- Reboot
- Run antutu 3 or 4 times, then reboot, run 2 times more.
- Highest score wins.
ROM: BlackICEv1.10
KERNEL : LordModUE v8.1b7 CFS
RADIO:12.56.60.25_26.09.04.28
Clock Speed MAX : 230 MHZ
Clock Speed MAX: 1075 MHZ
Governor : ondemand
Quadrant: 2399
Antutu: 2875
___
ROM: CyanogenMod 7 for the HTC Ace V7.1.0
RADIO:12.56.60.25_26.09.04.28
Clock Speed MAX : 245 MHZ
Clock Speed MAX: 1024 MHZ
Governor : ondemand
Quadrant: 2671
Antutu: 2985

My turn
DHD info:
ROM: Android Revolution HD™ 6.1.3
KERNEL : 2.6.35.14-RCMIX3D_v7-gd85ad63-dirty..........
RADIO:12.62.60.27U_26.13.04.19_M
Clock Speed MAX : 122 MHZ
Clock Speed MAX: 1152MHZ
Governor : ondemand
Benchmark Score :
Quadrant : 2140
Antutu : 2914
the Quadrant bench is not so good I see...

ROM: RCMix3d Runny v3.1
KERNEL : RCMix3d Kernel V7
RADIO:12.62.60.27U_26.13.04.19_M
Clock Speed MIN : 122 MHZ
Clock Speed MAX: 1228.8MHZ
Governor : smartass
Quadrant: 1651
Antutu: 2727

Perfect Setup for NS4G

Just thought I should share this info.. I've literally tried every combination of everything and after a few days I've settled for this combination..
Best of performance and battery life Ive ever used.
I've searched everything everywhere and this beats everything recommended.
rom: slimics 4.0
lcd density: 200
theme: cobalt
launcher: apex launcher pro
kernel: matr1x cfs 20.0
nstools settings
-----------------
io scheduler: sio
governor: smartassv2
min cpu: 100MHz
max cpu: 1300MHz
deep idle: on
default voltage
smartassv2 settings:
awake ideal freq: 400000 Hz
sleep ideal freq: 100000 Hz
sleep wakeup freq: 400000 Hz
min cpu load: 50 %
max cpu load: 85 %
ramp down step: 200000 Hz
ramp up step: 200000 Hz
down rate: 49000 us
up rate: 48000 us

well good for you, but every phone is different sooooooo dont hurt yourself patting your own back

Lots of people really digging slimics at the moment.
If I was to root I would try that rom for sure.
Sent from my Nexus S using XDA

ozkoidz said:
Just thought I should share this info.. I've literally tried every combination of everything and after a few days I've settled for this combination..
Best of performance and battery life Ive ever used.
I've searched everything everywhere and this beats everything recommended.
rom: slimics 4.0
lcd density: 200
theme: cobalt
launcher: apex launcher pro
kernel: matr1x cfs 20.0
nstools settings
-----------------
io scheduler: sio
governor: smartassv2
min cpu: 100MHz
max cpu: 1300MHz
deep idle: on
default voltage
smartassv2 settings:
awake ideal freq: 400000 Hz
sleep ideal freq: 100000 Hz
sleep wakeup freq: 400000 Hz
min cpu load: 50 %
max cpu load: 85 %
ramp down step: 200000 Hz
ramp up step: 200000 Hz
down rate: 49000 us
up rate: 48000 us
Click to expand...
Click to collapse
Cool story.
But smartassv2 != battery saving. It's a performance governor, not one meant to save battery.

So far I haven't found a ROM that's smoother or more responsive than... STOCK. I have to say this is the first time I am using the Stock ROM for sooo long. It's fast, responsive and it doesn't randomly reboot (uptime 1100+ hours).

+1 for Slim ROM!
It just keeps getting better and better.
Vs Nexus S 4G

polobunny said:
Cool story.
But smartassv2 != battery saving. It's a performance governor, not one meant to save battery.
Click to expand...
Click to collapse
Its battery saving with the smartassv2 settings I provided

ozkoidz said:
Its battery saving with the smartassv2 settings I provided
Click to expand...
Click to collapse
There's definitely better governors suited for battery savings though. Ondemand or conservative, for instance.

Lol. Just lol.
Sent from my Nexus S 4G using XDA

if youre only getting 8-9 hours with your setup - i dont think thats good at all....
ozkoidz said:
Just thought I should share this info.. I've literally tried every combination of everything and after a few days I've settled for this combination..
Best of performance and battery life Ive ever used.
I've searched everything everywhere and this beats everything recommended.
rom: slimics 4.0
lcd density: 200
theme: cobalt
launcher: apex launcher pro
kernel: matr1x cfs 20.0
nstools settings
-----------------
io scheduler: sio
governor: smartassv2
min cpu: 100MHz
max cpu: 1300MHz
deep idle: on
default voltage
smartassv2 settings:
awake ideal freq: 400000 Hz
sleep ideal freq: 100000 Hz
sleep wakeup freq: 400000 Hz
min cpu load: 50 %
max cpu load: 85 %
ramp down step: 200000 Hz
ramp up step: 200000 Hz
down rate: 49000 us
up rate: 48000 us
Click to expand...
Click to collapse

NOOP any better!!

S2 custom kernel tuning thread

S2 custom kernel tuning thread
Updated: 22/10/15​
Welcome to my universal tuning guide for the Samsung Galaxy S2 i9100. This guide will cover different profiles I've created to meet every single situation, whether you want to save more battery life or to have more gaming performance.​
Here is a following list of kernels that this thread will apply to:
- DorimanX kernel
- Apolo kernel
- Gustavo kernel
- DU kernel by Arnab
- Other kernels with variable changing support with underclocking and overclocking support
Guides:
- General Profiles
- Special Profiles
- Kernel Specific Profiles
List of things to do:
- Down threshold tuning
Changelog:
Code:
[B]24/10/15:
v1.1 [/B]
- updated most profile settings
- Added sampling rate tuning
[B]22/10/15:
v1 [/B]
- initial thread bring up[/SIZE]

General Profiles
These profiles will suit most devices and are generally used by most people with custom kernels. Of course, settings here are found on all custom kernels listed in the OP.
Please also be mindful that some governors behave better on certain kernels than others. Here is a list of governors that are known to work well on the following kernels:
- DorimanX kernel -> HYPER
- Apolo kernel -> PegasusQ
- Gustavo kernel -> PegasusQ (I think most governors work fine anyway)
Normal use/Default
Max CPU frequency: 1200mhz
Min CPU frequency: 200mhz
CPU governor: Ondemand/PegasusQ
Sampling rate: 50000
Up threshold: 85 or 75
IO scheduler: SIO/CFQ/ROW
Performance
Max CPU frequency: 1200
Min CPU frequency: 200
CPU governor: HYPER/NeoX/PegasusQ
Sampling rate: 50000
Up threshold: 60
IO scheduler: SIO/ROW/ZEN
Even more performance!!!
Max CPU frequency: 1300mhz (Personally, I don't recommend 1600mhz because it can be unstable, 1300mhz or 1400mhz should be fine on most devices)
Min CPU frequency: 200mhz or higher (Don't set this too high, personally, I think anything below 500mhz is still capable of good performance)
CPU governor: HYPER/NeoX
Sampling rate: 30000
Up threshold: 50 or 60
IO scheduler: SIO/ROW/ZEN
Gaming
Max CPU frequency: 1200mhz
Min CPU frequency: 200mhz
CPU governor: HYPER/NeoX/PegasusQ
Sampling rate: 40000
Up threshold: 60 or 75
IO scheduler: SIO/ROW/ZEN
Battery life
Max CPU frequency: 1000mhz
Min CPU frequency: 200mhz
CPU governor: Ondemand/zzmoove
Sampling rate: 120000
Up threshold: 90
IO scheduler: SIO/noop
Even more battery life!!
Max CPU frequency: 800mhz
Min CPU frequency: 200mhz
CPU governor: Ondemand/zzmoove
Sampling rate: 120000
Up threshold: 90
IO scheduler: SIO/noop

Special Profiles
These profiles are for people who want the best settings for specific situations
Good gaming performance with less battery drain
Max CPU frequency: 1200mhz
Min CPU frequency: 200mhz
CPU governor: Ondemand/PegasusQ
Sampling rate: 80000
Up threshold: 80
IO scheduler: SIO/ROW
Good gaming performance with even less battery drain
Max CPU frequency: 1000mhz
Min CPU frequency: 200mhz
CPU governor: Ondemand/PegasusQ
Sampling rate: 80000
Up threshold: 80
IO scheduler: SIO/ROW
Minimum drain from watching videos
Max CPU frequency: 800-1000mhz
Min CPU frequency: 200mhz
CPU governor: Ondemand/PegasusQ/zzmoove
Sampling rate: 100000
Up threshold: 85
IO scheduler: SIO/ROW
Minimum drain from listening music
Max CPU frequency: 800-1000mhz
Min CPU frequency: 200mhz
CPU governor: Ondemand/PegasusQ/zzmoove
Sampling rate: 120000
Up threshold: 90
IO scheduler: SIO/ROW

Kernel specific Profiles
These profiles are for people who have custom kernels that have unique settings
gsstudios's dorimanx default profile
Max CPU frequency: 1200mhz
Min CPU frequency: 200mhz
CPU governor (AWAKE): HYPER
CPU governor (SLEEP): Ondemand
Awake Up threshold: 70
Sleep Up threshold: 75
IO scheduler (Awake and Sleep): SIO
TCP algorithm: Westwood
gsstudios's optimized apolo kernel profile
Max CPU frequency: 1200mhz
Min CPU frequency: 200mhz
CPU governor: PegasusQ
Up threshold: 75
IO scheduler: SIO

Any suggestions will be great so that our fellow S2 users can have the best custom kernel experience!
I also encourage sharing of your own profiles in this thread. Just stay on topic and all will be fine :good: :victory:

@gsstudios
http://forum.xda-developers.com/showthread.php?t=2432029
This thread should be in OP. I learned a bit from there , because i could take a profile , test it , adjust some valumes test (...) again again... and finally create STweaks profile , thay suits be best.

MikiGry said:
@gsstudios
http://forum.xda-developers.com/showthread.php?t=2432029
This thread should be in OP. I learned a bit from there , because i could take a profile , test it , adjust some valumes test (...) again again... and finally create STweaks profile , thay suits be best.
Click to expand...
Click to collapse
I will have to ask eskriminal to update the stweaks OP, but since we don't see him on XDA anymore, this may not happen.

Is there a chance someone will add back the 100MHz CPU step? Siyah had it and I think it helped save power in some situations, like when playing music.
Also, can someone recommend a widget to quickly change profiles? Voltage control was good but it doesn't seem to work anymore.

apphoarder said:
Is there a chance someone will add back the 100MHz CPU step? Siyah had it and I think it helped save power in some situations, like when playing music.
Also, can someone recommend a widget to quickly change profiles? Voltage control was good but it doesn't seem to work anymore.
Click to expand...
Click to collapse
What kernel are you using? Dorimanx kernel allows underclock to 100mhz, apolo kernel uses stock frequencies, Gustavo kernel also allows 100mhz (i think)
Edit: Gustavo kernel doesn't support 100mhz

gsstudios said:
What kernel are you using? Dorimanx kernel allows underclock to 100mhz, apolo kernel uses stock frequencies, Gustavo kernel also allows 100mhz (i think).
Click to expand...
Click to collapse
Using Gustavo_s kk kernel 04-02-TWRP-TRIM... 200mhz is minimum, according to Synapse. To be honest, I've had bad experience with Dorimanx kernels before (tried 5-6 versions, always buggy or horrible performance). I might give it another try, I see that you maintain it now. Thank you.