Apple's 2010 MacBook Air (11 & 13 inch) Thoroughly Reviewed
by Anand Lal Shimpi on October 26, 2010 10:08 PM EST- Posted in
- Mac
- Apple
- MacBook Air
- Laptops
The Battery Life
Light Web Browsing
Here we're simply listing to MP3s in iTunes on repeat while browsing through a series of webpages with no flash on them. Each page forwards on to the next in the series after 20 seconds.
The display is kept at 50% brightness, all screen savers are disabled, but the hard drive is allowed to go to sleep if there's no disk activity. The wireless connection is enabled and connected to a local access point less than 20 feet away. This test represents the longest battery life you can achieve on the platform while doing minimal work. The results here are comparable to what you'd see typing a document in TextEdit or reading documents.
As glorified typewriters, you can’t beat the battery life offered by the MacBook Air. Light web browsing, document creation and music playback have minimal impact on the Air’s battery life. In fact, we actually beat Apple’s battery life claims in our light tests. The 11-inch Air delivers nearly 7 hours on a single charge and the 13-inch managed 11.2 hours. For a writer, you can’t do better than this.
Flash Web Browsing
The test here has three Safari windows open, each browsing a set of web pages with between 1 - 4 animated flash ads per page, at the same time. Each page forwards onto the next after about 20 seconds.
As always, the display is set to 50% brightness, audio at two bars, screensaver disabled and the hard drive is allowed to go to sleep if idle. The wireless connection is enabled and connected to a local access point less than 20 feet away.
If you use the MacBook Air as a full function P...err Mac, the battery life drops steadily. In our Flash web browsing test battery life dropped to 4 - 5 hours depending on which Air you’re looking at. And the difference between the two isn’t all that great. The 13-inch only managed an extra 30 minutes of battery life.
Multitasking Battery Life
Our final battery life test is the worst case scenario. In this test we have three open Safari windows, each browsing a set of web pages with between 1 - 4 flash ads per page, at the same time. We're also playing an XviD video in a window all while downloading files from a server at 500KB/s.
Our heavy multitasking test is the biggest issue. Neither MacBook Air was able to deliver more than 3 hours of battery life on a single charge. The problem here isn’t just battery capacity but also the performance of the CPUs themselves. A major component of long lasting mobile battery life is a concept known as rush to idle.
Let’s say we have two CPUs. The first is an ultra low power CPU that only consumes 10W under load, but 0.5W at idle. The second is a high performance CPU that consumes 40W under load and 1W at idle. If it takes the first CPU 5ms to decode a frame of video at 10W but the second CPU can do it in 1ms, the total energy consumed over 33ms is is 0.064J for the first CPU and only 0.036J for the second CPU.
The longer the first CPU is idle, the more its typical and idle power advantages will come into play (hence the results in the light web browsing test). The more CPU bound the workload however, the more the advantage over the second more high performance CPU will disappear. Our heavy downloading/multitasking test is the most CPU bound of all of our battery life tests and the workload is consistent regardless of how fast you execute it. In other words, a faster CPU won’t be able to do more work, it’ll just be able to rush to idle quicker.
The battery life story boils down to your usage model, even more so than with the MacBook Pro. Light users are going to get wonderful battery life out of the new MacBook Air, particularly the 13-inch model. However, if you are the type of user who does a lot of multitasking or if you’re running particularly CPU intensive apps (e.g. Photoshop, iMovie, etc...) then these two notebooks will hardly last you. I suspect this is the distinction Apple is looking to make. If you’re a regular user, just playing around on Gmail and browsing the web then the MacBook Air is all you’ll need. If you are doing any work with your machine however, you’ll want to look towards the MacBook Pro.
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dsee15 - Wednesday, October 27, 2010 - link
Great thanks. Until then as a technical site, does anyone have a sense what the faster proc and additional 2GB mem do to performance? For example, it should run 20% faster for cpu intense apps, etc.Shadowmaster625 - Wednesday, October 27, 2010 - link
Well if you're spending money on any of these crapple concraptions then you are either not being productive or simply getting paid too much. Like those retired public employees who get paid 6 figure pensions for doing nothing. I dont know when that crap will stop, but I imagine it will be at around the same time apple flirts with bankruptcy.michael2k - Wednesday, October 27, 2010 - link
They have more cash than Microsoft. So after Microsoft flirts with bankruptcy?Shadowmaster625 - Wednesday, October 27, 2010 - link
They do have a lot of cash. But I can easily see them burning up half of it buying back their own stock once it starts tanking. And the other half could be burned up by just one or two flops. And that can easily happen once most apple lovers realize we are in fact in a depression and there is just no place for a company like apple in a depression.ShepherdH - Wednesday, October 27, 2010 - link
they just gave you more RAM and a larger hard drive at them. Same with most other Apple products.iwodo - Wednesday, October 27, 2010 - link
When Apple gets SandyBridge, i suspect 32nm, SandyBridge 1.8Ghz could do so within the same 1.4Ghz C2D Power envelop. But will be much more powerful. The only trouble is Apple wants CPU to be CPU, not a CPU with GPU built in.khimera2000 - Wednesday, October 27, 2010 - link
im not sure about that. they might just be looking for a sweet spot with CPU and GPU performance. in which case AMD's APU chips should be an intresting prospect since it gives you modern architecture on both sides in one chip.where intel took two dies and just slaped them together,AMD made it so the CPU and GPU can actualy talk to each other, also if AMD is to be beleaved this core would be retasked in the presance of another AMD card so the video chip on the CPU dosent become dead weight like the intel solution which just shuts down entirely in the presence of another card. (at least thats what i read)
personaly i think apple should get back into building there own hardware just like the g4 days. but that would require building there own OS, and seeing as mac hasent built an OS from the ground up for a long time (last time being os9? check out something called OpenStep) it might not be in there best intrest with win 7 getting so much traction and the failings of there previous Operating Systems it might not be good for the company to build something there not good at creating.
khimera2000 - Wednesday, October 27, 2010 - link
actually i dont think thats the case. there looking for a balanced system, and to this day intel has not released anything that can run a modern title (that i know of) if intel had a half way descent architecture on there vid cards i could see apple using it.however as things stand intel does not have a descent processer, and thats the reason why they have to use an nvidia video card. being that these notebooks use intergrated memory i can see that apple is looking for a specific perfomance point for there systems.
with that in mind i dont see why they wouldent consider AMD's soon to releas offerings. these chips has better gpu/cpu intergration then intel's options and sports the latest DX11 video architecture AMD has. I dont think theres anything in intel's arsinal that would be able to but heads with these chips from a graphic stand point, the only rogue facter in this is the new CPU architecture, since it has to yet be released.
Speaking of which... when can we expect to see reviews of the amd APU offerings from Anand? i would love to see how well it ticks, and a review to better define what makes it so differant from the intel chips that are comming out... perhaps an architetual comparison sometime in the future???
khimera2000 - Wednesday, October 27, 2010 - link
wow... i didnt know my first post went through for this response.. sorry about that. my connection hickuped. Love the sight keep up the good work :Dblufire - Wednesday, October 27, 2010 - link
You stated that the software restore drive is not write-protected, but Apple states that it is read-only. Who's right?http://support.apple.com/kb/HT4399
Thanks for the review!