This rocks! I turned off everything but Find My Mac and Calendars and the remaining time on my battery has gone up over an hour!!!
Thanks
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OS X 10.8.2 Restores Notebook Battery Life to OS X Lion Levels
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This rocks! I turned off everything but Find My Mac and Calendars and the remaining time on my battery has gone up over an hour!!!
Thanks
This seems like a very well-documented test.
Unrelated, but I would not have guessed that SSD's use more battery life than HDD's in any scenario, you learn something everyday i guess
When I installed a Vertex 3 SSD into my MacBook, it halved the battery life.
Still love it though....
Can someone explain how an SSD uses more energy than an HDD that has to spin?
NEVERMIND, I JUST FOUND THE ANSWER.
NEVERMIND, I JUST FOUND THE ANSWER.
Will 10.8.3 restore it to Snow Leopard levels?
Also, while they are at it, I hope they restore many other things to Snow Leopard levels.
Also, while they are at it, I hope they restore many other things to Snow Leopard levels.
In the communities board on Apples site are so many complaints about sound stuttering, all sorts and ages of hardware. I have a mid 2011 iMac 27" i7 and with ML it stutters and finder keeps pausing for 30 seconds or more, making the whole system not much more than an expensive paper weight.
Reverting back to Lion solved the issue.
Those popping sounds you mentioned are most likely the same bug, but not so bad as some of us have. Listen to the open mic recording I made thats attached to hear it.
http://www.tomshardware.com/reviews/ssd-recommendation-review,3194-7.html
Quote:
"A disk-based drive will always consume more power absolutely. At the system level, an SSD increases power consumption because CPU and memory utilization rises in response to increased I/O activity (they're not sitting there, waiting on a hard drive to send data). But remember that an SSD-based configuration will always finish those operations faster. You see that reflected in the charts above. At the end of the day, an SSD lowers power consumption. This is why performance and power go hand-in-hand."
Quote:
"A disk-based drive will always consume more power absolutely. At the system level, an SSD increases power consumption because CPU and memory utilization rises in response to increased I/O activity (they're not sitting there, waiting on a hard drive to send data). But remember that an SSD-based configuration will always finish those operations faster. You see that reflected in the charts above. At the end of the day, an SSD lowers power consumption. This is why performance and power go hand-in-hand."
You should test with a Samsung 830 with .3W idle power draw or a M4 with about .6W and equal to an HDD.
All 5400rpm HDDs idle at .6-.8W. That is not energy efficient that is standard.
Running a 1.X W idle SSD is a bit dumb. If a notebook runs 6h on a 77Wh battery it consumes 12-13W on average. Every half Watt (0.5) translates to 4% difference. So a Samsung 830 should yield quite a bit of extra battery life.
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Regarding SSD vs HDD;
I would expect the usage model also make a lot of difference.. If you use your laptop with fairly little disk access the HDD will probably be more power efficient due to lower idle (power down the motor).. but if the usage requires more disk access a SSD will probably be more power efficient as it completes the task WAY, WAY quicker and can go into idle faster.
Anyway.. I'll sacrifice 5 minutes of battery life every day and every hour for the speed and noise benefits of SSD storage.
Also, as mentioned.. the Vertex isn't the best in candidate for testing this.
I would expect the usage model also make a lot of difference.. If you use your laptop with fairly little disk access the HDD will probably be more power efficient due to lower idle (power down the motor).. but if the usage requires more disk access a SSD will probably be more power efficient as it completes the task WAY, WAY quicker and can go into idle faster.
Anyway.. I'll sacrifice 5 minutes of battery life every day and every hour for the speed and noise benefits of SSD storage.
Also, as mentioned.. the Vertex isn't the best in candidate for testing this.
No, the software changes will presumably reduce the load on the CPU/GPU, which will cause the same amount of charge in the battery to last longer. It's like how two different makes of cars will get different mileages out of the same tank of gas.
Say, for example, Apple released an OS update where Finder calculated the first billion digits of pi every minute. No change to the hardware, but you'd expect your battery life to be severely reduced!
No battery comments from GGJ-Studios here? Now that is strange... (Although I like his commitment on that topic )
)
it doesnt, but it can fix issues where processes where using more CPU than needed which would make the battery last longer
When are these tests going to finally show ERROR BARS? just make three tests and put the average on the bar, the standard deviation on the errors. Do people really think that 2 minutes difference is significant/real??
Or install iStat Menus, which adds remaining time to the menu bar
This.... iStat Menus is an OCD's heaven when it comes to information about your laptop
Seems like the point of the testing was not too compare SSD to HDD so it doenst really matter. Clearly, the OS is saving battery life. They arent reviewing SSDs and HDDs.
This.... iStat Menus is an OCD's heaven when it comes to information about your laptop
I think I jizzed myself multiple times whilst configuring the thing
I'm in love with this app.
Did you even read the article? In their tests, 10.8.2 gave results better than SL.
OS handles power management. Different versions of OS do it a little differently so battery life can be better or worse.
Unlikely. The last build still had "TBD" instead of release notes in the installer so probably at least one or two more builds before release. But probably in the next couple weeks.
It's more like the OS can maximize the battery potential. There's some amount of power consumption the basic components require just to run, but how CPU cycles are used/allocated, HDD activity, caching, even things like sleeping the network.BT, display and KB brightness control, etc. (i.e., computer activities that have a range of potential power usage) are managed by the OS.
Interesting. Never thought that would affect battery usage so much.
I turned all mine off. Thanks for the tip!