Thin as ever, the latest Apple MacBook Air offers up to twice the storage and snappy performance.

MAcBook Air: Comparison with the MacBook

When reviewing the new MacBook, I wondered whether it might cannibalize sales of the Air, given that the MacBook has a faster processor, a built-in optical drive, more storage and better expansion prospects. (You can double the RAM to 4GB and easily access the hard drive for a quick swap.) And you get all that in a laptop that sells for £1,149, a cool £150 less than the cheapest Air.

Apple doesn't think so. Todd Benjamin, director of Apple's notebook marketing, reiterated in an interview that the Air is designed with a specific market in mind: buyers who want a lightweight yet comparatively powerful laptop. These are not up-and-coming Spielbergs crunching high-def video or high-end designers plowing through hundreds of photos a week as they apply filters in Adobe Photoshop (though Photoshop runs fine on the Air). MacBook Air owners are more likely do Web surfing, email, word processing, some light digital photo work and maybe even light gaming on red-eye flights between coasts.

That is one reason Apple made no changes to the maximum RAM installed in the Air. Personally, I'd hoped for 4GB as an option, as have various would-be buyers in numerous online forums, some of whom are ready to open up the Air themselves if need be.

According to Apple, the Nvidia integrated graphics processor gives the new Air four times the 3D gaming performance of the last model.

Apple MacBook Air

I'm not a gamer, but I did find that the Nvidia chip improved video playback. In my time with it, I noticed no stuttering when viewing YouTube videos or clips on news sites like CNN or MSNBC. Nor did video playback push the temperature up so high that it caused any problems. Users had complained that some of the early models would freeze up when playing videos - until Apple released a software update that apparently changed how quickly the built-in fans kicked in for first-generation machines.

Those fans helped keep things pretty cool. Although the review unit usually chugged along with an operating temperature of around 122 to 130 degrees, it did jump to 180 degrees at times when I was watching a video. (Processor usage never topped out either, generally hovering around 70 percent to 75 percent during playback.) I could hear the fans kick in to keep things from overheating - turning at about 6,200rpm, according to the iStat menu monitoring app I use.

And I never noticed the aluminium casing getting hot. Even the bottom was only slightly warm to the touch, a far cry from the early days of Apple's move to Intel chips in 2005. Some of those early MacBook Pros could get darn toasty.

NEXT PAGE: what a difference an SSD makes

Visit Business Advisor for the latest business IT news, reviews, tips and tricks - plus sign up for our unique and FREE business IT newsletter

See our Laptop Advisor website for expert reviews of today’s best laptops, plus read our essential advice to make sure you choose the right specs