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[INFO] CPU [MSM8974AC] Binning Concept, Overclocking, Undervolting

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17th September 2014, 09:07 PM   |  #41  
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I underclocked my Oneplus CPU voltage by 100mV (every freq step any lower and it will reboot).
It did it with the Franco kernel program.
It looks my phone is much faster but i can't understand why. It starts now at 300mhz with 675mV.

If i raise the voltage it looks Like the device is getting a little bit sluggish. Very weird.
The PVS bin of my One is 9
17th September 2014, 10:04 PM   |  #42  
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Quote:
Originally Posted by thespeed

I underclocked my Oneplus CPU voltage by 100mV (every freq step any lower and it will reboot).
It did it with the Franco kernel program.
It looks my phone is much faster but i can't understand why. It starts now at 300mhz with 675mV.

If i raise the voltage it looks Like the device is getting a little bit sluggish. Very weird.
The PVS bin of my One is 9

Perhaps your phone is making fun of you ehehe.

You ment undervolt. And by 100mv on all will lead to reboot from time to time. What you want is not to undervolt to much. But you want to find the balance between lower voltage and good speed. When you decrease voltage the frequency won't be stable as before and that will lead to errors if is to much. Wich lead the beeing necessary to reformat...
25th September 2014, 10:53 PM   |  #43  
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Quote:
Originally Posted by afiqq

just saw this thread. i have PVS 5 with speed bin 3. i keep getting random reboots and i think i know why now. undervolted all the way down to -50mV. now im trying -30mV with optimal max frequency stated (1574 MHz). hopefully no more reboots!

I got the same CPU like you (same PVS and bin). What are the latest settings you experienced working fine (stable and battery friendly)? I lowered only the CPU frequency because I was scared of undervolting. Would be very kind of you

Edit: I am now on franco r20, underclocked max freq. to 1267, changed to quad core mode and undervolted by 75mV and I'm running fine. Even after running Stability Test for a big amount of time on different freqs.

Best Regards

Sent from my OnePlus One
Last edited by blax123; 26th September 2014 at 10:43 AM.
26th September 2014, 01:39 PM   |  #44  
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Quote:
Originally Posted by blax123

I got the same CPU like you (same PVS and bin). What are the latest settings you experienced working fine (stable and battery friendly)? I lowered only the CPU frequency because I was scared of undervolting. Would be very kind of you

Edit: I am now on franco r20, underclocked max freq. to 1267, changed to quad core mode and undervolted by 75mV and I'm running fine. Even after running Stability Test for a big amount of time on different freqs.

Best Regards

Sent from my OnePlus One

I'm using AK kernel v.040 on Synapse.
1574 Mhz interactive
using Stock MPDecision
undervolt to -80mV
2048KB row i/o
drop caches enabled
FSYNC disabled(enabled by default)
Arch Power enabled

the lowest undervolt i've done was -120 at 1574mhz and it rebooted after 23hrs of use. Sticked to -80 eventhough i can go to -100 because experience noticable lag when heavy usage.
average battery life is around 20hrs with 5hrs screen time.

most of the time i have sync and gps off.
Unbounce xposed module used to control alarm_wakeup every 300 seconds.
to be frank this module contributes a lot on battery life.

edit: right now battery is at 25% 1d8h33m with 4h19m screen time on.
Last edited by afiqq; 27th September 2014 at 08:16 AM.
3rd October 2014, 05:53 PM   |  #45  
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Speed Bin 3, ACPU PVS: 7.

Doing the 1574MHz and my voltage table is:
268: 675mV
300: 690mV
422: 690mV
652: 690mV
729: 695mV
883: 710mV
960: 720mV
1036: 730mV
1190: 750mV
1267: 760mV
1497: 790mV
1574: 800mV
...
2457: 965mV

Looks pretty good to me, on the voltage table for the SD801's, my bin would be beyond 15+

Edit: Continuing on, I'm past PVS 15, UV'd -110 ~ -130, 635mV minimum and it's still blazing fast.
Last edited by qwahchees; 3rd October 2014 at 06:01 PM.
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