Back when I had a nexus I had issues with uv kernels. When I ran them my signal was bad and my data speeds were slower. I would have to stick with regular voltaged kernals.
What's the relationship with the processors voltage and the radio/baseband?
I've been asking this for a while and never really received a straight answer.
shameless bump to the top. Hopefully someone knowledgeable has an answer
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Hey all, I want to get some info on the limitations of our processor, mainly is their a ceiling on how high we can overclock our Evo's?
I am sure most of us here are familiar with the insanely fast 1.3ghz-1.8ghz(I think the top I read was 1.8ghz) speeds some newer phones are getting clocked to, the only thing that caught my eye about these speeds is that they are reported stable & usable. Coming from a Hero(a while ago) that I had to overclock to my Evo that is not really necessary to overclock was nice, BUT it would be awesome to have an Evo clocked at 1.5ghz-1.8ghz and stable as well as usable, is this even remotely doable? If not what is causing the limitation? Just curious
Edit: HAPPY THANKSGIVING, I am very thankful for my wife & kids as well as all you great guys and gals here at XDA!
Sent from my White Evo 4G
It all depends on your phone....what may run on yours may send mine into random reboot...I found mine is stable at 1.13
You may want to raise the bar a little at a time to see what you can handle....be sure not to have it set on boot till you are sure your phone can handle it....
Sent from my froyo using the xda app
matthewjulian said:
Hey all, I want to get some info on the limitations of our processor, mainly is their a ceiling on how high we can overclock our Evo's?
I am sure most of us here are familiar with the insanely fast 1.3ghz-1.8ghz(I think the top I read was 1.8ghz) speeds some newer phones are getting clocked to, the only thing that caught my eye about these speeds is that they are reported stable & usable. Coming from a Hero(a while ago) that I had to overclock to my Evo that is not really necessary to overclock was nice, BUT it would be awesome to have an Evo clocked at 1.5ghz-1.8ghz and stable as well as usable, is this even remotely doable? If not what is causing the limitation? Just curious
Edit: HAPPY THANKSGIVING, I am very thankful for my wife & kids as well as all you great guys and gals here at XDA!
Sent from my White Evo 4G
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not exactly sure how it works on the phones but if its anything like a pc processor then it would take a kernel that can tweek voltages right like to get a 1.8 on our ever i would say it would need about a 3 step down uv but not sure if it would be stable heck at 3 step down uv it shouldn't boot unless its set oc'd on splash boot I'm pretty sure since our proc. are first gen snapdragons and the one's in the G2 and myTouch 4G are second with a smaller die ours won't be able to make it that far up with out major modification
Hmmm......so if I were to get off my ass and learn to compile a kernel I could at least attempt it, good info, thanks! At least now I have a place to start researching, I think I would be happy with a bump to an even 1.5ghz if it were stable, well if anyone else has more info I'm all ears!
Sent from my White Evo 4G
I got mine at 1.15 anything past that seems unstable 1.2/1.25 reboots automatically (cm7 nightly 88)
The FroYo kernels come unlocked to 1190 I believe. When I was running FroYo I ran 1152 all the time. You don't really need to compile your own kernel unless you really want to. All of the kernels available here are unlocked except for the stock kernels. Also 1190 was about the limit for most EVOs.
I don't have an evo, but I do have a snapdragon, use quadrant to check scores after an overclock. 1190 isn't so good. Makes lower scores than the stock 1ghz. Fsb bottlenecks at that speed, but gets a boost at 1530. I've had my snapdragon around 1600 stable all day. Low battery life though.
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Hello,
I was just wondering if there were any downsides to the overclock kernel for the evo and if it made any difference.
Can you please answer?
Thanks
I havent heard of many people that have evo's doing this, but overheating and having the battery/phone break is always something to be considerate of; with that being said, if you set a profile in setCPU to automatically underclock when you reach 42 or 43 degrees C, it shouldnt be an issue.
one other thing to consider is stability of your phone when you overclock. people try many different kernel / rom combos and find out what works best for them.
OK, searched first, heres the gist of a thread from the N1 section:
Originally Posted by SBS_
I remember reading something about undervolting a while back in this forum and I found it quite interesting. Some are saying that undervolting the cpu doesn't actually save battery on the device, as the cpu will just up the ampere to get the amount of power it needs.
Don't take my word for it though.
Well that's what my first impression was. I mean, a CPU needs more energy to run faster. So if you lower the voltage I would assume it would lower the power which would either lower the speed or make it increase energy usage to run faster. Anyone else have definite info?
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Which made me think, duh.... um ok, so if a CPU requires X wattage, then wouldn't their theory be correct? Or do CPUs have logic built in to compensate and allow for out of spec voltages??? OR is it like undervolting a PC fan, where it just works... but I guess running off a power supply I never would have noticed if the fans drew more amperage... Mr. Tesla???
Also, my more to the point question, does undervolting affect the radios, as has been postulated?? I can understand on a PC if you undervolt the CPU, you are probably isolating that mod to the CPU itself, but in our cases, if the radio theory is correct, the undervolting would be systemwide... or is it??? I think a Dev should probably know this.. just asking, I need all the 3g I can get at home, Sprint is the best coverage in this area EXCEPT at my house... and Id rather not get forced onto VZ, not until Sprint jacks their prices so much its not worth it anymore... and the Premier ripoff is a start... anyways, undervolting!.... FIGHT!
First off I'm fairly aware of the fact that benchmarks are not accurate representations of the day to day real life usefulness of the handset.
That said, I used both linpack and quadrant standard edition for the first time tonight while testing another kernel with my current rom (which is cm7, ggingerbread-6).
At the conclusion of my testing it was very obvious that one kernel completely outclassed the other in a benchmarking situation, however something else became apparent that leads to this post.
If I follow and believe everyone else's benchmark scores, even those posted an hour earlier in the same kernel thread, then I might have the slowest Evo on planet earth.
I see other users of the same rom and kernal posting scores which are never below 1500 in quadrant, I saw one instance of 1300 but nonetheless, even overclocking to 1075 I can barely break 1100 and usually fall just below that. Sadly enough on the "slower" of the 2 kernals I was barely surpassing 900.
Now on the linpack side of things I don't have any comparative scores to judge against, but ill post what I received anyhow for information's sake. On the "faster" of the two kernels (the one that came prebuilt into the rom) I was getting between 33-34, on the new kernel I was testing I was getting between 19 and 22, these are all "mflops" of course, whatever that may be.
Someone give me some information or advice here! Do I just happen to have a slow evolution, or are others either exaggerating or using some trick/mod/tweak I'm royalty unaware of??
Thanks in advance!
some people brag, some people cheat, most have low scores, few have high, there isn't a very good baseline and the benchmark programs dont scale very well at all, I have run 1800 scores and I have run 600 scores, guess what. both roms were smooth and you wouldn't have been able to tell a difference, what does that mean? do we believe the benchmark programs? are they spitting a random number at us? who knows! dont believe them, be satisfied with how your evo is running and if it's not running very well then try a different kernel or rom, keep trying new ones until your satisfied, only then will some benchmark program output not mean a thing
Most of my Quadrant benchmarks with aftermarket ROMS+kernels have been in the 1100-1400 range, using VaelPak and various kernels to get most of the better scores there. The highest I've had was CM7RC1 with the SnapTurbo kernel, got an 1821. It was unusable, though.
I've come to the conclusion that the benchmarks aren't as important as battery life, especially with the Evo.
Biggest reason for the huge difference in numbers? Different versions of the app. The dev changed how it rates phones.
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Thanks!
Explained. I knew they were totally not concurrent with the outward performance and usability of the device, and for what its worth while I've only ever flashed a total of 3 roms, this one is perfect for me and I seem to be one of the rare few with no problems whatsoever, everything works exactly as I would expect it to. So yes, l never feared my device was suddenly slower now that I knew the all knowing superultrabenchmark number.
I've never done this before so I'm just curious what are good levels to set? And what are the benefits of doing it? here is a pic of what I'm running... Thanks in advance..
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Please dont quote me on this and maybe someone else here with a bit more knowledge could chime in, but when I first rooted I started playing around with UV and would become unstable and adjust accordingly. When all was said and done and I found a stable set up there almost wasnt a decent enough difference for me to even notice in battery life. I was informed that the amount of battery to reboot the phone one time actually uses more juice that what you would save all day undervolting. Also most of the Kernels I have used such as Franco are already pushed pretty low to conserve. If you use a Kernel outside of stock I would almost recommend to not even mess with it. Again someone with a bit more knowledge in the area might know more.