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diesel47

macrumors newbie
Original poster
Oct 8, 2014
3
0
I've heard that Macbooks will have worse battery life if somebody uses bootcamp to run windows on them. This was from and old source.. But is this still true?

Users that would be getting like 9 hours on OSX, would be getting 2-3 on windows bootcamp.

If so, Is the only solution to wipe OSX and install only windows on the machine to get the 9 hours battery life?
 

2984839

Cancelled
Apr 19, 2014
2,114
2,211
No, battery life is not affected by the number of operating systems you have installed. Simply installing Windows has no effect on anything but storage space.

Whether Windows runs with worse battery life or not is a different story that I don't know the answer to. It certainly would have no effect unless you had booted into Windows.

Now, running virtual machines concurrently with OS X will reduce battery life, but that's different from Bootcamp.
 
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diesel47

macrumors newbie
Original poster
Oct 8, 2014
3
0
No, battery life is not affected by the number of operating systems you have installed. Simply installing Windows has no effect on anything but storage space.

Whether Windows runs with worse battery life or not is a different story that I don't know the answer to. It certainly would have no effect unless you had booted into Windows.

Now, running virtual machines concurrently with OS X will reduce battery life, but that's different from Bootcamp.

I'm only asking about when you actually run windows with bootcamp, I know battery life isn't affected by using disk space.
 
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2984839

Cancelled
Apr 19, 2014
2,114
2,211
I'm only asking about when you actually run windows with bootcamp, I know battery life isn't affected by using disk space.

In that case, it may be worse, but definitely not that much worse.

I was addressing your last question of whether deleting OS X and only having Windows on it will improve battery life.
 
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diesel47

macrumors newbie
Original poster
Oct 8, 2014
3
0
In that case, it may be worse, but definitely not that much worse.

I was addressing your last question of whether deleting OS X and only having Windows on it will improve battery life.

Because people have said that bootcamp uses unoptimized BIOS emulation that doesn't use things like AHCI and full speed PCI-e when running windows. But this was 2 years ago. I'm wondering if it is the same now. If so, the only solution would be to get rid of OSX?
 
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Samuelsan2001

macrumors 604
Oct 24, 2013
7,694
2,123
It will be worse under windows

It will be worse under windows although version 8.1 is supposed to be much better optimised for battery life.

Having both OS's makes no difference, if you run windows you will have less battery life if you run OSX you wioll get more.
 
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Stetrain

macrumors 68040
Feb 6, 2009
3,548
18
The biggest difference is in whether or not you have a model with a dedicated graphics chip.

Under OSX it will switch between integrated and dedicated graphics depending on what you are running, but in Windows it will always run the dedicated graphics. That could cause a much reduced battery life over OSX.
 
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dusk007

macrumors 68040
Dec 5, 2009
3,391
63
The drivers are just not very well optimized for battery life and if you have dGPU like in the 15" MBP you also suffer from not being able to use the integrated GPU.

Basically it is like a cheap windows notebook in battery life. A Samsung with the same battery capacity and similar chips will run a third longer to almost twice as long. It just not a good idea to use a Apple notebook under windows, though personally I think the poor touchpad drivers are more aggravating.
Performance is fine you get full PCIe performance and full speed everywhere but the platform cannot power down as low as it does under OSX. When sitting idle it just sucks more under Windows. That isn't Windows's fault but Apples. Samsung gets with proper power optimized drivers the same power consumption out of Windows as Apple gets from OSX.
You can help it some if you set Windows to the battery optimized power plan. That kills some of the peak performance and scales back on responsiveness slightly and still doesn't make up the difference.
You will just have to live with it.

This all has nothing to do with the EFI and bios optimization. You can install Windows 8 in EFI mode which works well. Back when you could not do that installing only Windows would have done anything. Because how the OS talks to the hardware (BIOS basic input output system, EFI is the new version) can only work one way on certain hardware. The problem are the bootcamp drivers. They are stable and performance is fine but power optimization for windows was just not high up on Apple's priority list. Touchpad drivers are crap too. If you want to use predominantly Windows buy a good Asus or Samsung notebook, they are just better at it.
 
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827538

macrumors 68000
Jul 3, 2013
1,644
1,791
It's very simple.

Take my Retina Macbook Pro for instance. I have both OS X and Windows installed via bootcamp. If I choose to run Windows then my battery life does go down to 2-3 hours. But if I boot into OS X then I get my completely normal 8-11 hours of battery life.

Having both installed doesn't affect the battery life in any way, it's completely dependant on which OS you are using at that given time. Windows is not as efficient an OS at Mavericks/Yosemite and on my Mac it uses the dGPU as default rather than switching between the iGPU and dGPU like OS X does.
 
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monoorb

macrumors newbie
Oct 10, 2014
10
0
Yes, Windows via bootcamp will give you horrible battery life. On my rMBP, Windows will use the dedicated video card instead of the integrated video card.
 
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snaky69

macrumors 603
Mar 14, 2008
5,904
484
In my personal experience, I get about half to a third the battery life I get on OS X while in Windows.

It's simply a question of driver and OS integration and optimization. Since windows has to run on just about anything, it can't be optimized for specific hardware like OS X can be.
 
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