The latest crop of MacBook Pro laptops from Apple has several new features, such as a new generation of Intel processors, improved dual graphics and increased battery life. Most of the changes, however, are relegated to the 15in and 17in models.

The latest crop of MacBook Pro laptops from Apple has several new features, such as a new generation of Intel processors, improved dual graphics and increased battery life. Most of the changes, however, are relegated to the 15in and 17in models. The 13in models remain the least expensive of the Pro line, but also remain the most similar to the previous generation.

What's changed

Both new Apple 13in MacBook Pro laptops include nVidia's GeForce 320M integrated graphics, which shares a minimum of 256MB of main memory. This replaces the GeForce 9400M integrated graphics in the previous generation (which shared the same amount and type of RAM). In our testing, the new 13in models achieved much better framerates on our Call of Duty test. For example, at 38.9fps, the 2.4GHz MacBook Pro did 15.2fps better than the higher-end, 2.53GHz 2009 model - an improvement of 64 percent. They still lagged way behind the new low-end 15in MacBook Pro, which garnered 68.4fps thanks to it discrete graphics.

In battery life, Apple claims a three-hour increase over the previous 13in MacBook Pros - the new laptops offer up to 10hrs of battery life, instead of seven. Part of the longer life is due to a slightly higher capacity built-in battery - 63.5Whrs versus 60Whrs in the previous model. But Apple credits most of the improvement to the greater efficiency of the GeForce 320M graphics over the 9400M. Our standard battery test, which plays a looped video in QuickTime until the battery dies, showed a life of 4hrs and 19 mins for the 2.4GHz model and 4hrs and 33 mins for the 2.66GHz model. Those compare favorably to the 2009 13in 2.26GHz (3hrs and 30 mins) and 2.53GHz (3hrs and 38 mins) models, as well as the current MacBook model (3hrs and 45 mins). In simple terms, the batteries do indeed last longer.

The new Apple MacBook Pro laptops have the same multitouch glass trackpad as before, but the line adds a new trick. All of the new MacBook Pros (including the 13in models) now have inertial scrolling. Just like on an iPhone, iPod touch or iPad, swipe your finger down to scroll through a long web page, for example, and the momentum continues the scrolling until it gradually dies off. The feature seems right at home on the MacBook Pro and will be familiar to anyone who has used Apple's iPhone OS devices.

Another new feature, common to the entire MacBook Pro line, is the ability for the Mini DisplayPort connection to output multichannel audio in addition to the video signal it has always carried (the MacBook Pro supports mirroring or extending your desktop on an external display up to 2560x1600 pixels, but the adapters needed are all optional accessories). To test it out, we purchased a Mini DisplayPort-to-HDMI adapter and connected the MacBook Pro to an HDTV using an HDMI cable. Although it worked for video (letting us play beautiful 720p video without problem) the audio didn't play through the TV, instead coming out of the MacBook Pro's built-in speakers. Apple recommends higher-quality cables, saying that some lower-priced cables don't work.

What's the same

Although the 15in and 17in Apple MacBook Pro laptops include Intel's new Core i5 or Core i7 mobile processors, the 13in MacBook Pro continues to use a Core 2 Duo chip. In the 13in size, Apple offers a 2.4GHz dual-core processor in the £999 model, and a 2.66GHz dual-core processor in the £1,249 model (up from 2.26GHz and 2.53GHz in the previous generation, respectively). Each has 3MB on-chip L2 cache shared between the two cores.

Some users have wondered why Apple decided to stick with Core 2 Duo processors instead of using the new Intel Core i3 in the MacBook Pro 13in line. Although one could cynically speculate that it's designed to 'cripple' the low-end MacBook Pro with old technology to force people to spend more, it seems more likely that Apple didn't want to use the Intel HD integrated graphics that such a move would require (the 15in and 17in models include Intel HD graphics, but have dedicated nVidia graphics processors as well).

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