This month, Apple rolled out updates to both the MacBook and MacBook Pro.

Of the two, the new MacBook Pro offers more talking points; the chips have been replaced, not just sped up, and the trackpad now includes all those lovely Multi-touch gesture controls we first saw on the iPhone and, more recently, the MacBook Air.

Latest processor technology

The processors in the MacBook Pro represent the latest mobile version of the Intel Core 2 Duo range. Gone are Intel's Merom chips, which were the first mobile C2D chips when launched back in 2006.

Replacing them are the smaller, faster Penryn chips, which drop energy consumption down to 35W from the Merom's 44W. While the clock speed has not been bumped up all that much, advances to the circuitry bring better battery life and overall performance.

Meanwhile, the price has stayed the same, though admittedly the Apple Remote is now an optional extra (£15), whereas before it was bundled for free.

Inside the latest Macbook Pro

Compared to the slinky MacBook Air, the MacBook Pro seems like quite a chunky laptop, though it's still less than an inch thick and this 15-inch model weighs just 2.5 kilos.

Three MacBook Pros are available: 15-inch 2.4GHz Intel Core 2 Duo, 15-inch 2.5GHz and a 17-inch 2.5GHz. Plenty of upgrade options are available at the point of sale, and chief among these options is an upgrade to 2.6GHz chips on either the 15-inch or 17-inch models, and of course more memory, some screen options and bigger drives.

The only hardware upgrade you can make after purchase that doesn't void your warranty is to install more RAM.

All MacBook Pros ship with 2GB of memory (667MHz DDR2) and can expand to 4GB. The entry-level 2.4GHz MacBook Pro, still a very fine workhorse, ships with a 200GB hard drive, up from 120GB, and NVIDIA GeForce 8600M GT graphics processors with 256MB of video memory.

The 2.5GHz 15-inch and 17-inch MacBook Pros ship with 512MB of video memory and the same NVIDIA graphics cards.

The Penryn chips can carry a larger L2 cache, circuitry that speeds access to commonly used data, and this has changed. It has dropped to 3MB (from 4MB) on the entry-level 2.4GHz MacBook Pro, while being raised to 6MB on the other two models.