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I have recently rooted my dhd and currently running CM7. Using the cpu setting within the performance menu I am wondering what peoples thoughts are on a noticeable but safe increase of cpu speed. its set as 1017MHz which i believe is default. I am told I can run anything up to 1500 safely. can anyone confirm this and also tell me what kind of result (performance and battery life) i should expect.
thanks
Well, I use Android Revolution HD (a sense rom, meaning heavy UI!) and i overclock to about 1.3GHz. In terms of battery life when it's awake, it seems a drain a teeny bit more readily, but I've never had a freeze on sense (quite rare)
On stock it underclocks to let the processor max at around 400MHz when the screens off, so that helps to really save a lot of battery on standby. On CM, I'd expect it'd feel more or less the same in terms of performance after you hit 1.2/1.3GHz
hmohammed43 said:
Well, I use Android Revolution HD (a sense rom, meaning heavy UI!) and i overclock to about 1.3GHz. In terms of battery life when it's awake, it seems a drain a teeny bit more readily, but I've never had a freeze on sense (quite rare)
On stock it underclocks to let the processor max at around 400MHz when the screens off, so that helps to really save a lot of battery on standby. On CM, I'd expect it'd feel more or less the same in terms of performance after you hit 1.2/1.3GHz
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thanks for the reply mate. going to try out revolution HD soon i think. have you overclocked using a third party app or is there one built into that rom?
also im a little confused by the governors. 'on demand' is the default governor. Does that mean it will only use the max selected cpu speed when necessary? would you recommend using a difference setting?
cheers
rhodri11 said:
thanks for the reply mate. going to try out revolution HD soon i think. have you overclocked using a third party app or is there one built into that rom?
also im a little confused by the governors. 'on demand' is the default governor. Does that mean it will only use the max selected cpu speed when necessary? would you recommend using a difference setting?
cheers
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The CPU is managed by the ROM itself. You can tweak it yourself by using setCPU (or similar), but I can advise you not to. Can't help you with the governors buddy, since I dunno what it is
Cheers
darude0306 said:
The CPU is managed by the ROM itself. You can tweak it yourself by using setCPU (or similar), but I can advise you not to. Can't help you with the governors buddy, since I dunno what it is
Cheers
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nice one dude
I'm running cm7 and I'm overclocked to 1.5 ghz. It's been totally fine for months.
Sent from my Motorola Startac running Atari 2600 software!
rhodri11 said:
thanks for the reply mate. going to try out revolution HD soon i think. have you overclocked using a third party app or is there one built into that rom?
also im a little confused by the governors. 'on demand' is the default governor. Does that mean it will only use the max selected cpu speed when necessary? would you recommend using a difference setting?
cheers
Click to expand...
Click to collapse
Lucky you picked a linuxhead!
The system itself has a daemon (background process built into the system) that handles overclocking. It's all explained on the page and also on this thread:
http://forum.xda-developers.com/showpost.php?p=14638641&postcount=34279
You can use another app (like SetCPU) but the daemon usually handles screen off's quicker. The governors basically determine how the processor frequency is changed. I'll explain the common ones:
Performance - Runs at highest speed, so if you have a range of 200 to 1.3G, it'll stay at 1.3G all the time, not usually the best
Ondemand - The universal default for phone overclocking, it only changes the speed up after a certain percentage of the CPU is used, and it switches on the fly, so if the CPU is used too much at 400MHz, it'll ramp it up to maybe 600 or 800, and if it's still overused, it'll put it up to maybe 1 or 1.2G
Conservative - This is like ondemand, except it makes the changes more gradual. It can give noticable lags in the foreground at times, so this is mainly used when the phone is asleep (screen off)
Smartass - This governor is like ondemand, except it'll less readily switch frequencies to higher values when it detects the screen off. This isn't really used because the overclocking daemons take into account the phone being awake or not
Basically, there isn't really a need to change governors, only really frequencies if anything. The thread, however, does tell you how to change governors.
Im using latest LeeDroid GB 3.2.1 and to be honest with the work he's done with the Kernal (3.1.8BFS) I have found that the ROM is a lot MORE responsive without me overclocking the CPU.
Im not really sure how it all works, but I guess doing this on different ROMS has its own different out comes.
overclocking has me confused too, is there really that much of a benefit in it? how much will i gain from it?
toby_lerone said:
overclocking has me confused too, is there really that much of a benefit in it? how much will i gain from it?
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There is a benefit when you use certain apps, or even sense itself. For example, I've never had sense ui freeze, or go slow. The under clocking helps to improve the rubbish battery life when your phone is asleep.
In terms of measuring the gain, I have no idea. Really, I'd think you could use a process heavy app, or benchmarking app and see.
There's also loads of guides on overclocking to help out! (that's how I got the hang of it! )
Sent from my Desire HD using XDA Premium App
For the need on OC, it depends on the kind of apps u're using. If u're happy w a non OC DHD, its totally up to u.
But for the UC, it works as a terrific battery saver, mich better/effective than other battery saver soln on market
The safe range depends on the DHD as the manufacturing changed even though same part, i'm OC 1.5GHz "On Demand" profile and under clock 245MHz on screen off "Power Save" profile.
Getting approx a day usage on Lee 2.1.
Hey i just got setcpu for my epic...I overclocked it to 1200 and i undervolted it. Whats the safest overclock? my undervolts are -125mV at 100MHz, -75 at 200MHz and 400, -50 for 600 and 800mhz, and -25mV for 900 1000 1100 and 1200....are these safe values? anyone have recommended values or know the lowest safest ones?
thanks
EVERY Phone is different! And any overclocking can potentially damage your phone. I would never go higher than 1200, my phone starts to lock up at 1300, but there are crazies out there pushing their phones to 1500.
kennyglass123 said:
EVERY Phone is different! And any overclocking can potentially damage your phone. I would never go higher than 1200, my phone starts to lock up at 1300, but there are crazies out there pushing their phones to 1500.
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what about undervolting at each MHz in order to save battery?
andrewt328 said:
what about undervolting at each MHz in order to save battery?
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People have gotten mixed results. Best thing to do is try it. Never select set on boot in case it screws up your phone. Start small, 25mV per frequency and run you phone for a bit. Keep a chart. If something don't work go back to previous settings and try changing certain frequencies until your phone is stable. When you are sure of stability, pick set on boot and run it for a day to see if it makes a difference in your battery life.
kennyglass123 said:
People have gotten mixed results. Best thing to do is try it. Never select set on boot in case it screws up your phone. Start small, 25mV per frequency and run you phone for a bit. Keep a chart. If something don't work go back to previous settings and try changing certain frequencies until your phone is stable. When you are sure of stability, pick set on boot and run it for a day to see if it makes a difference in your battery life.
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if i put it on set on boot and the phone crashes, will my phone be dead for since it will boot to that power every time and crash? or could i just restore it through cwm and have it work again?
thanks
andrewt328 said:
if i put it on set on boot and the phone crashes, will my phone be dead for since it will boot to that power every time and crash? or could i just restore it through cwm and have it work again?
thanks
Click to expand...
Click to collapse
You can restore through CWM. Also if you are using Voltage Control a little screen pops up telling you that it will make a quick flashable file to restore your stock settings. I can't remember the name of the file but you will see it.
I know that every phone is very different but both my phones sit well at 100Mhz:-100 200Mhz:-100 400/600Mhz:-75 800/1000Mhz:-50 1100Mhz:-25
I know these may not work on yours but this might help for a base line. Hope it helps.
EDIT: and yeah both phones are over clocked to 1500 with deadline / ondemand
Stable OC for my Epic !!!!
I have used Voltage control to OC it with settings : 400 Mhz minimum(recommended somewhere in dev post), 1340 Mhz maximum(~1400 mv voltage which I think maximum my handset can handle) with ONDEMAND governor.
My Epic is running flawlessly with no random eboots of FC's since last 4 days (while it used to reboot atleast 3-4 times daily earlier).
ROM : ERA Lagendary RC2
Kernel : Samurai 2.0.1 (inbuilt with Rc2)
Theme : Ei22Ics version 2 (just for fun !!!)
Epic Timezzzzzzzzz !!!!!!
Okay so I'm pretty much familiar with the whole oc situation that's pretty much putting the phone anything above 1000mhz right?
But what exactly is uv? I thought it was just having the maximum below 1000 but it seems there's a way to go a lot lower than that?? I'm not sure if I'm just confused or what's going on.. but I seen ppl saying things about having their phones on stuff like -125 to 200 mhz or something like that
How could u go negative or was I just not feeling well when I thought I read something like that..? Can anyone help me out please lol
Sent from my SPH-D700 using XDA App
oh my gawd noob......just kidding
Overclocking pushes the cpu frequency aka speed.
Underclocking limits the cpu frequency.
Overvolting pushes more voltage/battery to the phone to stabilize/add preformance, however there will be more heat and more chance of ruin.
Undervolting takes away voltage to help lower comsumption of battery and in some cases helps the cpu run cooler and faster or even more effieciently.
How To:
Download voltage control from the market. Open it, and go into the voltages tab. Press the frequencies that are empty. You can tap the whole thing and it will bring up the bar for voltages lower it on free version or add voltage on the paid version only.
Sent From My Cyaned Legend
undervolting is all about getting the least battery drain on each frequency. -125 means they are running 125 mV below stock. The downside is if you run to low it will freeze your phone and you may have to do a battery pull..thats why i dont go above -25 on 900 and 1000mhz but can get -125 on 200mhz. I disable 100 mhz because my phone has problems with it and havent seen any difference in battery. Each persons phone will be different, some can only do -25 on each frequency. Download Voltage control and toy around. Just dont SET AT BOOT until you've used the settings for a few days.
mjh8812 said:
undervolting is all about getting the least battery drain on each frequency. -125 means they are running 125 mV below stock. The downside is if you run to low it will freeze your phone and you may have to do a battery pull..thats why i dont go above -25 on 900 and 1000mhz but can get -125 on 200mhz. I disable 100 mhz because my phone has problems with it and havent seen any difference in battery. Each persons phone will be different, some can only do -25 on each frequency. Download Voltage control and toy around. Just dont SET AT BOOT until you've used the settings for a few days.
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And be careful... setting uv too low can cause in erased data and dat corruption... and that includes your sd card!!!!
Sent from my SPH-D700 using Tapatalk
Thankss everyone
I use setcpu now I used to use voltage control
I tried once messing with the upthreshold or whatever that is and messing with frequencies but ill see what I can find out on my own
I usually don't mess with any of the advanced settings or frequencies
I just always sent my phone to like 100-400 mhz when I'm not really using it
And 400-800 when I'm actually using it and it always runs smooth and nice but if there's a way to make it save even more battery and still perform well then I wanna find out lol
Sent from my SPH-D700 using XDA App
I wanted to know some more about undervolting and was hoping someone could help and explain a bit. Basically, what I'm seeing is when I undervolt my device on the max side of things, eventually the device freezes and needs a battery pull or reboots. When I don't touch the max voltage values and only drop the min values the phone seems more stable and doesn't reboot. Can someone explain if my thinking of only undervolting the min values is correct and why this may be happening. Also, what would be the proper way to undervolt the phone? I have been using system tuner to do so on deck's 1.3 ROM using the Lee +sbc kernel. Thanks for taking the time to read this and for all the helpful responses.
Sent from my Decked Evo running Lee+sbc... It's easier this way.
I have this same question! I was trying to figure this out becuase the freedom kernels have something to do with under and over voltage to allow better OC? not sure on why the you would need and over voltage to over clock?...
What is your ROM/Kernel setup?
Remember that undervolting and underclocking are two different things. Over/underclocking, via apps like setcpu, raise/lower the frequency at which your processor operates. Over/undervolting raises/lowers the power voltage available to your processor at any given frequency. This can potentially cause problems if you have a kernel set to undervolt your processor while running an app like setcpu to overclock it. This may be why you are seeing issues with your phone.
pmacevad said:
[snip]
I have been using system tuner to do so on deck's 1.3 ROM using the Lee +sbc kernel.
[snip]
Sent from my Decked Evo running Lee+sbc... It's easier this way.
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Concordium said:
What is your ROM/Kernel setup?
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OP clearly states he's running Deck's 1.3 and Tiamat 3.3.7 (aka LEE kernel)
OP should also state Deck's ROM version but I'm assuming 1.3d as it's most popular next to 1.3 Stable.
I'm running the same setup - Deck's 1.3d with LEE SBC. I'd like someone to explain (as the OP also asked) the difference between the MIN and MAX sides of the undervolting equation please.
(I do understand underclocking AND that it is a separate and different animal and for the record, my EVO is UC'd to 128/499MHz and using Smartass governor)
I'm just not sure what I'm looking at in the ST interface (what's the first number and what's the number in [] brackets?) and also not sure just why there is both a min and max voltage for each frequency and how it affects performance.
Thanks much for any inputs.
J.
I use vipermod and terminal emulator for aosp roms its much more stable than using system tuner and you can drop all voltages with a single command it all depends on your particular hardware but typically around -100 the phone will lag or freeze i usually stick to -50 at stock voltages and -25 on overclock i never overclock over 1075mhz as anything higher and my phone tries to cook my fingers however now im oc to 1.6ghz on my et4g with a 200mhz min and it stays nice and cool like it was clocked at 1.2ghz stock the exynos is capable of clock speeds up to 2 ghz but the phone doesnt handle those speeds well similar to the evo not liking anything over 1.19 at 1.2 on the evo theres a good chance of frying the logic board or bursting the battery from heat if you overclock dont undervolt too much as it makes the processor get really really hot due to it having to work harder from lack of energy to power it
We are legion, for we are many
Sent from my Anonymous DeathStar in the depths of GalaXy S2
To answer the min/max at each freq min is the lowest voltage that freq will run while idle max is the highest voltage the freq will run while in use the voltages are depenedant on the load running at the particular freq ie how many process' are running the more process' the higher the voltage required to power the processor
We are legion, for we are many
Sent from my Anonymous DeathStar in the depths of GalaXy S2
Is there an app the will show actual voltage the CPU is using in real time?
Sent from my Synergized Aggressive Lionfish Evo using the XDA app
bmw pro will u can set the mv on the widget or set recording in the app and it will log the info
We are legion, for we are many
Sent from my Anonymous DeathStar in the depths of GalaXy S2
I had a similar issue with undervolting and underclocking. I was setting my CPU min/max to 128-499 MHz and undervolting to -75 or -100 using Lee with Smartass v1. But I was getting too many random reboots and freezes on each ASOP rom I tried (e.g. Deck 1.3d, CM7).
I've been playing around with these settings. I changed my CPU to 128-576, no undervolting, and SZ 2.2.1 with SavagedZen governor. I haven't had any random reboots and my batter life is about the same...plus my phone is MUCH snappier. I'm still getting a little screen on lag but not nearly as much as I was at 128-499 and undervolted.
As a note, I normally run Deck 1.3d as my daily driver but for the last couple days I've been running KWIQ. It's definitely giving 1.3d a run for its money as becoming my daily driver.
Anywho, are there any rules of thumb with undervolting and underclocking? Like is 128 MHz is too low with -100 undervolting? Or are these things pretty much phone dependent? I know each phone seems to respond different to these things.
-EViL-KoNCEPTz- said:
To answer the min/max at each freq min is the lowest voltage that freq will run while idle max is the highest voltage the freq will run while in use the voltages are depenedant on the load running at the particular freq ie how many process' are running the more process' the higher the voltage required to power the processor
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Thank you. That made good sense to me. Question then: is it suggested/typical to drop min and max by equal amounts or is it typical to drop min more (so there's juice for the proc under load but maybe being more aggressive with the sleeping/idle side of things or can the proc run at a given frequency at different voltages)?
jackfrost909 said:
I'm just not sure what I'm looking at in the ST interface (what's the first number and what's the number in [] brackets?)
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Are you familiar enough with ST to shed some light on this? Please if so. Thank you.
detcup4evr said:
Is there an app the will show actual voltage the CPU is using in real time?
Click to expand...
Click to collapse
-EViL-KoNCEPTz- said:
bmw pro will u can set the mv on the widget or set recording in the app and it will log the info
Click to expand...
Click to collapse
Though I have to recheck this I don't remember BMW showing the voltage being used at each frequency just the overall voltage draw. If you know otherwise or another tool that does, please share
Thanks for all the help.
J.
--
Tapa Tapa Tapa..
Let's see.. My phone flies, my battery doesn't suck.. and your point was.... ?
OG EVO - Deck'd and LEE'd because it's just better this way.
Lionfish kernel
Has anyone tried undervolting with lionfish kernel on SENSE Roms, is it stable?
einstein562 said:
Has anyone tried undervolting with lionfish kernel on SENSE Roms, is it stable?
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I use aggressive and it works well but some phones don't like it, hopefully I can get vipermod to work, and that will allow you to adjust each frequency independently
Sent from my Synergized Aggressive Lionfish Evo using the XDA app
I actually just got rid of lionfish aggressive on MikG3.11
I had a lot of lagginess, but battery life was really good... Back to anthrax for me, lionfish was based at one point on freedom kernels I thought, maybe one of those would be better...?
What's the best thing to use to control undervolting on sense roms?
Sent from my PC36100 using Tapatalk 2
Is the battery life improvement substantial when undervolting?
I have governators set at 240-650max and am getting decent life on my ics savoca kernel.
What % improvements are obtained?
Well I don't have logcats and scientific evidence, but I saw about 12 hour days, with moderate use, everything syncing, lots of text a few calls, hotspot for an hour or so, some web browsing, but the random revolts and lagginess on that was horrible, freedom was better.... It's worth it to underclock
I have everything set to 384-1152.
Different governors for profiles, screen off @ conservative because I have a lot to sync
Sent from my PC36100 using Tapatalk 2
So, I know we all have different phones, and after looking at a review of some voltages to try, I changed all the stock voltages to the ones I saw and saved them as default (don't ask me why, I do not know myself). Since this, I set my phone to hotplug and the phone has had multiple Sleep of Death cases. I think it has to do with the voltage but it could just be my phone not liking hotplug because it stops if I turn off hotplug. Or hell it could be that both together are causing it. So I was wondering could someone provide me with stock voltages at 384, 729, 1036, 1228 and 1344 mhz. Or better yet if you could provide me with the best voltages that help save a little battery life. Thank You! (Also I have been looking but have not found the stock voltage for the numbers I listed above)
stock voltages are 1025, 1203, 1317, 1380. 1350mhz is not a stock clock speed so theres no stock voltages. you can try these undervolt values, they are pretty conservative 850, 950, 1050, 1175 and 1250. remember to do nandroid backup first.
undervolt will not really gain you any noticeable difference in battery life, the cpu uses relatively little power to begin with so reducing it by a few hundred mv is not going to make a different with normal use. If you want to try it out just start from stock and go down 25-50mv at a time and test it with some games or stress test.
neotekz said:
stock voltages are 1025, 1203, 1317, 1380. 1350mhz is not a stock clock speed so theres no stock voltages. you can try these undervolt values, they are pretty conservative 850, 950, 1050, 1175 and 1250. remember to do nandroid backup first.
undervolt will not really gain you any noticeable difference in battery life, the cpu uses relatively little power to begin with so reducing it by a few hundred mv is not going to make a different with normal use. If you want to try it out just start from stock and go down 25-50mv at a time and test it with some games or stress test.
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Thank you. If they really don't make a difference I will leave them be at stock. Any good value for 1350? Or should I just stick with 1250mV? Just really trying to get 2 days out of the phone, but I assume I cannot complain since I am already getting 4h of screen time with normal use on the 2000mah battery. I will look around here some more and see if I can find any more useful tips on better battery life. Thanks again!
neotekz said:
stock voltages are 1025, 1203, 1317, 1380. 1350mhz is not a stock clock speed so theres no stock voltages. you can try these undervolt values, they are pretty conservative 850, 950, 1050, 1175 and 1250. remember to do nandroid backup first.
undervolt will not really gain you any noticeable difference in battery life, the cpu uses relatively little power to begin with so reducing it by a few hundred mv is not going to make a different with normal use. If you want to try it out just start from stock and go down 25-50mv at a time and test it with some games or stress test.
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I wish I would have read this post a few days ago prior to changing my voltage settings also. Only to learn that I wasn't doing my GNex a significant favor.
falconfan said:
I wish I would have read this post a few days ago prior to changing my voltage settings also. Only to learn that I wasn't doing my GNex a significant favor.
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Ya thankfully read it, tried these voltages with hotplug on and screen off settings and the phone did not sleep of death this time, but it froze right after wakeup, so no hotplug for me, just conservative.
Also, be very careful with CORE and IVA undervolting. In my case, undervolting theese too much caused the exactly same issue you are dealing with. Same goes with profiles for SetCPU profiles which also causes the phone to behave like that in some cases
keem85 said:
Also, be very careful with CORE and IVA undervolting. In my case, undervolting theese too much caused the exactly same issue you are dealing with. Same goes with profiles for SetCPU profiles which also causes the phone to behave like that in some cases
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So for what I can make out from your post, some reason its setcpu profiles not working, not the phones cpu itself not allowing it be put into hotplug mode? also, sorry for the noob question but what is the difference between CORE and IVA undervolting? Or should I say could you explain them to me.
If you are going to use profiles, your phone should be very stable. In other words undervolting makes it instable if you tweak it too much. Core and iva are very sensitive. Core is your graphic gpu. Let them stay at the normal settings. Use milestone franco stable build undervolting only the cpu. Rather 700 mhz at the lowest. Try it out
EDIT: "If you are going to use profiles, your phone should be very stable BEFORE setting profiles"
Sent from my Galaxy Nexus using xda premium