So how does PVS BIN affects performance ?
a cpu with pvs bin 4 is a lot better than a CPU with PVS Bin 1 ?
http://forum.xda-developers.com/showthread.php?t=2443934
szabyka95 said:
So how does PVS BIN affects performance ?
a cpu with pvs bin 4 is a lot better than a CPU with PVS Bin 1 ?
Click to expand...
Click to collapse
.... I have 4 and no... can't OC, UC, UV... basically anything besides stock values the "lot better" cpu rejects...
Might be also the custom kernels fault ... who knows
Till now the pvs bin has zero info value...
szabyka95 said:
So how does PVS BIN affects performance ?
a cpu with pvs bin 4 is a lot better than a CPU with PVS Bin 1 ?
Click to expand...
Click to collapse
[For reference] http://forum.xda-developers.com/showthread.php?t=2215710
There seems to be a bit of confusion, about the significance of the PVS value. They relate to Process Corners, and in part to threshold voltage, there is a lot more to it than that, but I'll keep it simple.
So far we've seen PVS values of between 0 to 6.
0 seems to indicate a SLOW corner, this means that its leakage current is lower than a 6, but its timings are slower. In theory, this chip should be good for power consumption, but offer less overclocking potential.
So, 6 means a FAST corner, this means that its leakage current is higher than a 0, but its timings are faster. Again, theoretically this chip offers good overclocking potential, at the expense of possibly higher power consumption.
Firstly, don't worry about it, all these chips have to pass Qualcomm's quality assurance, and lastly a higher PVS number is not necessarily the best, it depends on your priorities.
What you said was correct, I couldnt have explained it that well.
---------- Post added at 02:13 PM ---------- Previous post was at 02:10 PM ----------
PAGOT said:
.... I have 4 and no... can't OC, UC, UV... basically anything besides stock values the "lot better" cpu rejects...
Might be also the custom kernels fault ... who knows
Till now the pvs bin has zero info value...
Click to expand...
Click to collapse
Its just binning based on samples from those batches, you could still end up with an OC dud despite having higher PVS as they only sample a few and cant test every single one. But as the guy before me said they all meet quality assurance standards.
Lower voltage can mean lower heat, but there are other factors also at play.
Related
Tks everyone. I think I have enough info and GPU OC has been work properly
PVS Binning : 3
Frequency Table : 230
So my phone is less badass?
@[email protected] said:
PVS Binning : 3
Frequency Table : 230
So my phone is less badass?
Click to expand...
Click to collapse
No, but u phone still kick some butt on OCing:laugh::laugh:
Qualcomm produce same batch of chip for Snap 800 series and only use high binning chip to make further 801, 805....
To identify binning for each chip, they tested every chip.
Check using Pimp my Z1.
PVS Binning: 5
Frequency table: 250
wow mine is 2 :crying:
frequency table 220
gandalf_grey91 said:
Check using Pimp my Z1.
PVS Binning: 5
Frequency table: 250
Click to expand...
Click to collapse
Lucky guy.............
Pvs binning: 4
Frequency table: 240
PVS Binning: 4
Frequency Table: 340
From Iran
why should they be different??!
NiM72NiK said:
PVS Binning: 4
Frequency Table: 340
From Iran
why should they be different??!
Click to expand...
Click to collapse
Variance in electrical components is very common, hence why some phones can handle overclock and undervolt much more than others
NiM72NiK said:
PVS Binning: 4
Frequency Table: 340
From Iran
why should they be different??!
Click to expand...
Click to collapse
Freq table =340 ? 240?
I'm surprised you guys don't know this but we z1 users have a snapdragon 800 vv and guys instead of overclocking you should focus on undervolting and underclocking because even at 200 MHz GPU max and 1.6 GHz CPU max with -95mv undervolt I have no performance drops in gaming(dead trigger,avabel,etc) compared to stock except the heat has reduced and battery is a bit longer...
Lastly look at the screens in the post after the next post
BlackSoulxxx said:
Freq table =340 ? 240?
Click to expand...
Click to collapse
340 my friend
Screens
The last screen is to show that I get this battery while using an HD live wallpaper
NiM72NiK said:
340 my friend
Click to expand...
Click to collapse
Screenshot?Interesting.................
Got mine last year, November or so...
PVS Binning : 3
Frequency Table : 230
PVS Binning : 3
Frequency Table : 230
I feel sorry for the 2 votes for 1
Myself I'm on 4/240 which seems to be the most common so far. I never heard about this before but it's pretty interesting
BlackSoulxxx said:
Screenshot?Interesting.................
Click to expand...
Click to collapse
actually i dont get what are these numbers..but what is different when i'm now on 340??
NiM72NiK said:
actually i dont get what are these numbers..but what is different when i'm now on 340??
Click to expand...
Click to collapse
U devices is crazy man...... If is true, I will call Qualcomm by my self
BlackSoulxxx said:
U devices is crazy man...... If is true, I will call Qualcomm by my self
Click to expand...
Click to collapse
last antutu test gave me 25000 score are still want to call them?!
btw what can i do know that others cant?
Update: I added a poll.
What do you guys have for PVS Bin.
PVS 5 on mine.
You do not need root, I used RootExplorer ironically enough.
Steps:
Go to sys/module/clock_krait_8974/parameters
Open table_name
PVS 7, bin v1
is it good or bad? lol
Higer the PVS number lower the voltages for the frequencies in the table.
However its not guaranteed that a higher PVS Bin CPU can OC higher than a lower binned part as they take samples when doing binning, so there could be lower binned parts that OC just as high as higher binned parts and vice a verse.
HD2Owner did a nice table here:
[GUIDE] Snapdragon 805/801/800/600 Clock & Voltage (PVS bin) guide
http://forum.xda-developers.com/htc-one-m8/general/guide-snapdragon-801-clocking-voltage-t2807173
PVS 6
Speed 3, PVS 8 v1
speed3-pvs6-bin-v1
PVS9... not useful without DooMKernel
AndroPlus said:
PVS9... not useful without DooMKernel
Click to expand...
Click to collapse
It is useful since it uses less power and heats less by CPU clock voltage ratio set by Qualcomm...
Ok just to be clear all are Speed 3 and v1 but PVS is different, mine is 8
PVS 8, you have nice one. I am usually on the low side with my luck on most devices lol.
PVS 8 for me too :good:
PVS12
Sent from my D6503 using XDA Free mobile app
PSV 11
pvs4 [emoji22]
Pvs 8. What is the highest?
I believe it's 15.
pvs4
pvs7
In my 4 exchanges this week for defects, PVS Bin increased each time lol. Went from 5,6,7,8.
PVS 8
.
Martin213 said:
pvs15
Click to expand...
Click to collapse
Wow you got the highest possible , nice.
Guys I added a poll, please vote.
According to the review of Anandtech, the Mali T760 GPU on our Galaxy S6 has a unused 852 Mhz clock state. Normal speed now is 772 Mhz. Hopefully, this can be enabled in future in custom kernels to better drive those 2k displays. I wonder why they didn't enable it default as the SoC on 14nm should handle the temperature. More speed Ahead i hope.
"There's also a suspicion that Samsung was ready to go higher to compete with other vendors though, as we can see evidence of an 852 MHz clock state that is unused. Unfortunately deeply testing this SoC isn’t possible at this time as doing so would require disassembling the phone"
http://www.anandtech.com/show/9146/the-samsung-galaxy-s6-and-s6-edge-review/2
That's cool! Maybe they didn't enable it to safe battery?
Beukhof1 said:
That's cool! Maybe they didn't enable it to safe battery?
Click to expand...
Click to collapse
Perhaps, with custom kernel we can maybe turn off 2 A57 cores and ramp up to MAX GPU 852 Mhz, that'll be sweet.
Actually the test on the battery page proved that the GPU is throtteling when it targets the maxium frequency
"The one major issue here that is visible from the FPS vs time graph is that Samsung continues to struggle with graceful throttling as the GPU attempts to always target maximum performance, which causes a strong rise and fall in frame rate as the GPU goes through periods of high and low clock speeds determined by the thermal governor."
kemo6600 said:
Actually the test on the battery page proved that the GPU is throtteling when it targets the maxium frequency
"The one major issue here that is visible from the FPS vs time graph is that Samsung continues to struggle with graceful throttling as the GPU attempts to always target maximum performance, which causes a strong rise and fall in frame rate as the GPU goes through periods of high and low clock speeds determined by the thermal governor."
Click to expand...
Click to collapse
I think this only happens on sustained push by the benchmark app, i doubt it'll be same behaviour on real world usage. But in any case custom kernels will provide various tweaks and alternative governors to try.
They have also hidden 4 frequencies on the larger cores. They are at 2.2 even though they can go up to 2.5.
guaneet said:
They have also hidden 4 frequencies on the larger cores. They are at 2.2 even though they can go up to 2.5.
Click to expand...
Click to collapse
Exynos 2.1Ghz not 2.2Ghz...
SD810 2.0Ghz
Sent from my SM-G920F
ama3654 said:
I think this only happens on sustained push by the benchmark app, i doubt it'll be same behaviour on real world usage. But in any case custom kernels will provide various tweaks and alternative governors to try.
Click to expand...
Click to collapse
DVFS is sadly in effect all the time limiting the frequency. You can check it yourself by opening CPU-Z in multiwindow (only way to display frequency of the mali gpu) and running a game. Only thing that is going to let users run customised settings is xposed with DVFS disabler + custom kernel.
What is the PVS bin? It is a known fact that not all semiconductor chips leave the factory equal because of complicated baking process, and for most expensive complex articles like CPU and GPU manufacturers introduced a sorting practice called "binning". Qualcomm also has such scale for their chips, that consist of PVS value range from 1 to 15, to aware Android software how many voltage it should apply to CPU on a certain clock to run error free. The bigger PVS value is, the lesser power required to run CPU stable. So, the story is about energy effectiveness.
Please, share your Droid Turbo PVS bin in a poll.
How to know your bin: use file manager to go to the path /proc/cpu/, and open file msm_acpu_pvs as a text.
PVS bin value is stored as a hexadecimal, so when you see a letter instead of a digit, convert it to decimal like: A=10, B=11, C=12, D=13, E=12, F=15, and vote in the poll above. Thanks! )
(Inspired by this thread)
Mine is 3
Oops. Didn't see the options above
Cobra04 said:
Mine is 3
Oops. Didn't see the options above
Click to expand...
Click to collapse
LOL. Sorry, added poll lately ) Mine is 6.
Voted. Mines 8.
Does this essentially mean I can undervolt more before the device becomes unstable and reboots, than someone who has a PVS value of let's say 2?
iiWoodstocK said:
Voted. Mines 8.
Does this essentially mean I can undervolt more before the device becomes unstable and reboots, than someone who has a PVS value of let's say 2?
Click to expand...
Click to collapse
Yes. Probably, your SoC CPU cristal with "8" was in the center of semiconductor wafer, and mine "6" was somewhere closer to the side
The difference in voltage applied not so big, I guess, from 0 to 20mV max in your favor.
As for the "2" CPU, it is tougher, and will be auto driven by higher voltage. Or we set it manually by installing custom kernel with voltage tune support, and try to earn your effectiveness. But then, again, you can start manual control too, tuning voltage down, and Turbo with "2" will suck (
s5610 said:
Yes. Probably, your SoC CPU cristal with "8" was in the center of semiconductor wafer, and mine "6" was somewhere closer to the side
The difference in voltage applied not so big, I guess, from 0 to 20mV max in your favor.
As for the "2" CPU, it is tougher, and will be auto driven by higher voltage. Or we set it manually by installing custom kernel with voltage tune support, and try to earn your effectiveness. But then, again, you can start manual control too, tuning voltage down, and Turbo with "2" will suck (
Click to expand...
Click to collapse
Interesting! Thank you for the explanation! So I guess that's why I'm able to undervolt -70mV without encountering stability issues, where others would get reboots if they did the same.
Mine is 6 and was written as digit
I have a 64gb turbo with 2 :_( :_(
4
Sent from my XT1254 using Tapatalk
8 on xt1250
Mine was 6 (which I voted-in)
My wife's phone is 4 (which I cannot vote-in because the poll won't let me vote twice)
schwinn8 said:
Mine was 6 (which I voted-in)
My wife's phone is 4 (which I cannot vote-in because the poll won't let me vote twice)
Click to expand...
Click to collapse
) I can't double vote too, having 7 pcs by the hand. PVS bits on them are: PVS4 - 1 pcs, PVS5 - 4 pcs, PVS7 - 1 pcs, PVS9 - 1 pcs.
What settings if any inside of kernel audiutor can lower the temp on my note 4? Cpu, boost...etc?
Wrong section, but you can reduce the max freq and boost settings. The 805 is inefficient by today's standards, due to using an obsolete manufacturing process. The 835 and newer can hit peak freqs without burning up, but with the 821 > it's best to go easy on boosting (or OC if present).
Ace42 said:
Wrong section, but you can reduce the max freq and boost settings. The 805 is inefficient by today's standards, due to using an obsolete manufacturing process. The 835 and newer can hit peak freqs without burning up, but with the 821 > it's best to go easy on boosting (or OC if present).
Click to expand...
Click to collapse
What settings do I apply? Thanks
Kernel dump