Overcloking and underclocking? - Sprint Samsung Galaxy S III

I'm running KT747 (Build 3/14/13) and I'm just wondering what this stuff is and does it affect my battery/performance, and if so how? Thanks to anyone that can help!

Overclocking speeds up main processor past 1.5ghz, kernal must support this function. Underclocking slows processor speed to whatever you set maximum under 1.5ghz. Under is good for saving battery, but can cause lag depending on how you use your phone. Governors control how the processor handles requests, such as opening an app, with on demand gov, processor ramps up quickly, with lagfree gov, processor kinda takes it time, which in return saves battery. If your not comfortable or understand this totally, be careful, search for guides on xda about overclocking and governors. Overclocking can cause bootloops, freezes, or other issues. I overclocked mine to 1.7ghz with no problem, but I'm running Agat kernal.
sent from somewhere

Related

Regard overclocking to 1.8 ghz

Hi, im just about to flash leedroids 2.2.3 rom, which can oc to 1.8 ghz with setcpu, just wondering if there are any dangers in having it at this speed? anything to be aware of ?
It might fry your device, it might not, you never know. There's no need to run it at 1,8ghz. I'd recommend max 1,2ghz for daily use though everything runs smoot at 1ghz already.
If you overclock to 1.8Ghz you will increase the risks to fry your CPU(and hence, your device will be destroyed). Lol.
Also overclocking too high can drain your battery real fast. As per Hawks556, max 1.2Ghz would be fine.(perhaps it is almost to optimal)
I overclock mine at 1.16Ghz and it is already very smooth in LeeDrOid.
You may sometimes wish to overclock it until 1.8GHz is just to show off to your peers only. Maybe through quadrants. But later on make sure you underclock it back.
Cheers. =)
thanks for the help, lol whole thing just froze while i was reading it better underclock it lol : /
OC up to 1.5ghz should not harm your device.
Take a look at ths HTC Flyer: it has the same CPU as the DHD but it's set to 1.5ghz by default.
So there is no risk in overclocking up to 1.5ghz in my opinion.
Tapatalked with Tapatalk from my Desire HD using Tapatalk.

[Q] increase max cpu clock?

is it possible to overclock above 768mhz? my phone never gets warm and battery lasts 2+ days, completely stable at this speed, i want to learn how i can edit a kernel and increase the cpu voltage ever so slightly and increase max cpu clock and see whats stable, could you help me?
i think you will just start to get kernel panics if you try to go much higher .
i have another phone (lg 500) also with the same arm6 cpu that comes clocked at 600 from factory. i have the option to oc to 825 with custom kernel but it always panics at 806 and is stable at 787.
So i think if you want a faster phone go buy one
massigann said:
i have another phone (lg 500) also with the same arm6 cpu that comes clocked
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Nope.
P500 has an ARM11 MS7227 processor
Wildfire has an ARM11 MS7225 processor.
http://xi0.info/qualcomm-chips-kernel-arm-phones_7000.html
lol the chipset for the wildfire is MSM7225 but the cpu is arm6/11? on half of the sites is arm6 the other arm11..
Hi I have mine set to 710 and any higher starts getting random reboots.
But overclocking any higher than 768, your risking a chip melt or definitely shorting its life.

Undervolting

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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Click to collapse
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

How dangerous is it to overclock the GNex to 1, 5 Ghz?

Waaazuuuuppppppp Guys?????
Can anybody tell me if it's dangerous to overclock the CPU to it's stock clock speed (the stock 1,5 Ghz of the OMAP 4460, not the stock 1,2 Ghz of the GNex).
I was thinking that it will not harm the CPU in any way because the OMAP was designed to run at that clock speed, am I right?
Hope anybody here can help me with my question
Sent from my Galaxy Nexus using XDA
Depends on heat really. I'm sure it can run 1.5Ghz, but the increased voltage needed and the associated heat will shorten the life of the processor. I've had issues while charging and using nav on the phone where it reboots due to heat on stock clocks...I'd really not advise going to 1.5Ghz without proper ways to cool.
Every phone is different, some handle overclocking better than others, I haven't had any of the problems described when overclocked to 1.65GHz, but I'm sure others do.

[Q] Safe level of OC? ElementalX Settings?

I would like to flash the Elemental X Kernel over CleanROM, and I am interested in slight OC'ing. I notice with the installer it sets the boot CPU and GPU to what you set it to during the install.
If I use trickster mod can I go back to stock if I set the cpu to 1.7ghz in the install?
I figured 1.7-1.8 would be a mild OC and no more than the preferred 450 for the gpu. What does everyone else use? I game a lot on the nexus but don't want to overheat the device too much.
Br4nd3n said:
I would like to flash the Elemental X Kernel over CleanROM, and I am interested in slight OC'ing. I notice with the installer it sets the boot CPU and GPU to what you set it to during the install.
If I use trickster mod can I go back to stock if I set the cpu to 1.7ghz in the install?
I figured 1.7-1.8 would be a mild OC and no more than the preferred 450 for the gpu. What does everyone else use? I game a lot on the nexus but don't want to overheat the device too much.
Click to expand...
Click to collapse
Yes, you can go back to whatever frequencies you desire and for the heat, for me, it heats up no matter what
However these temperatures are normal so nothing to worry about.
I live in the Caribbean with a Tropical Climate and i run at 1.7 ghz with 450mhz for the gpu with not much heat problems.
rap3rman said:
Yes, you can go back to whatever frequencies you desire and for the heat, for me, it heats up no matter what
However these temperatures are normal so nothing to worry about.
I live in the Caribbean with a Tropical Climate and i run at 1.7 ghz with 450mhz for the gpu with not much heat problems.
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I set mine to these, all seems stable and noticeably better for gaming,
I use Trickster Mod to change everything, always loved the app.
CPU: 1.7ghz
GPU: 450mhz
CPU Governor: Performance (while gaming), ElementalX (Regular Use)
GPU Governor: Ondemand (always)
Undervoltage: 850
I also have D2TW (Double Tap to wake) just because it's easier for me.
I play Order & Chaos a lot, with pure stock settings I noticed slight frame issues while in heavy populated area's or if using a lot of in-game commands at once. I now notice nothing..

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