Apple has recognised the boom in mobile computing by upgrading both its power and budget notebook ranges. In its PowerBook performance range the G4 processor has at long last hit the 1GHz mark, while cost is clearly driving the iBook changes with pricing falling well below £1,000 for the entry-level model.

The new PowerBooks (pictured) come in two specifications — one with an 867MHz G4 processor and one with a 1GHz G4 chip. Both retain the 15.2in widescreen that Apple pioneered, but now graphics are delivered to the display by ATI's Mobility Radeon 9000 chip sporting 32MB DDR (double data rate) RAM.

Aesthetically nothing has changed and the PowerBook sticks to its sleek Titanium roots, weighing 2.4kg and measuring just 25.4mm thick. But one addition to the high-end model is a SuperDrive DVD writer. This slot-loading drive allows users to burn both CDs and DVDs on the PowerBook using the preinstalled iDVD software.

The 867MHz model is available now priced £1,616 ex VAT, but you will have to wait until next year to get your hands on the £2,084 1GHz model.

The iBook range has also got a bit faster, using G3 processors running at up to 800MHz twinned with ATI's Mobility Radeon 7500, but this hike in performance hasn't been matched by increased cost — pricing starts at just £723 ex VAT for the basic model.

All products will be sold online through the Apple Store, as well as via retailers.