• After 15+ years, we've made a big change: Android Forums is now Early Bird Club. Learn more here.

galaxy s3 cpu power saving

GreatBigDave said:
Does anyone know how much the CPU's performance is restricted when this option in power saving is chosen? Just curious.
Click to expand...

This is a feature that doesn't make a whole lot of sense to me- I've seen a ton of discussion on whether underclocking a CPU saves battery & unless it's during the time the phone is sleeping/inactive, I don't buy that it really helps.

The gist of the argument is that a faster processor speed can complete tasks more quickly, allowing the phone to return to the default slower CPU speed more quickly. Seems to me that any scheme to save power through CPU speed should lower the minimum speed and/or switch to a CPU governor that drops very quickly to the lowest speed following active use.

The way they have it set up on this phone, seems like it will just make your phone seem slower without really saving any battery. dimming the screen and /or using dark wallpaper & shortening your screen timeout and limiting radio use/syncing will have a much more noticeable effect IMHO.
 
It makes a little difference but I'm not interested. Yes some tasks will take longer to use the cycles needed to perform them, but the voltage is lower too so if the duration of process x voltage is lower in power save, it will save power.
 
Power saving doesn't seem to help me at all. I quit using it when I realized there was no difference in battery life with my phone usage. I tried overnight too unplugged. Same battery drain whether power saving mode is on or off.
 
Power saving limits the top frequencies of the CPU, but when the screen is off, it goes into deep sleep and sticks around 200mhz anyway so you would only notice an increase in longevity whilst the screen was on
 
My S3 does seems faster when switching between apps and it is definitely faster during heavy game play. When during normal use (email/surfing web/text/phone/music), my phone gets warmer with the CPU Power Saving Off and battery drains a little faster. Normally I just leave CPU Power Saving ON unless I'm playing games.
 
SUroot said:
It makes a little difference but I'm not interested. Yes some tasks will take longer to use the cycles needed to perform them, but the voltage is lower too so if the duration of process x voltage is lower in power save, it will save power.
Click to expand...

I just remember my own experience with my Motorola Triumph- I would overclock from 1.0 to 1.4 Ghz with no noticeable effect on the battery, so I guess I don't see how underclocking from 1.5 to around 1.1 will really make much difference in battery life...
 
no it wont make much difference. You're right. It will take a noticeable performance hit for a marginal power saving, but a saving none-the-less. Its not worth it in my opinion but
 
You must log in or register to reply here.
Back
Top Bottom