Apple has expanded on the G5 range, adding machines that boast faster processors and better graphics. A new, top of the range model have two 2.7GHz processors and a 16x SuperDrive, and all machines come with Gigabit Ethernet, FireWire 800 and 400, USB 2.0, optical digital audio input and output, and analogue audio input and output.

'The Power Mac G5 continues to deliver the ultimate performance for our most advanced customers running bandwidth- and compute-intensive applications,' said Philip Schiller, Apple's senior vice president of Worldwide Product Marketing. 'With dual 2.7 GHz 64-bit G5 processors, dual 1.35 GHz front side buses, ATI Radeon 9650 graphics, 16X SuperDrive with double-layer support and Mac OS X Tiger, the new Power Mac G5 is the most powerful and advanced Mac we have ever made.'

Details of the three new models are as follows:

Dual 2.7 GHz - £1,999; 512MB 400 MHz DDR SDRAM (8GB maximum); 250GB Serial ATA 7200 rpm hard drive; AGP 8X Pro graphics slot; ATI Radeon 9650 with 256MB DDR SDRAM and support for one 30-inch Apple Cinema HD Display; 3 PCI-X slots (one 64-bit 133 MHz, two 64-bit 100 MHz); and; 16X SuperDrive (DVD+R DL/DVDR/CD-RW).

Dual 2.3 GHz - £1,699; 512MB 400 MHz DDR SDRAM (8GB maximum); 250GB Serial ATA 7200 rpm hard drive; AGP 8X Pro graphics slot; ATI Radeon 9600 with 128MB DDR SDRAM; 3 PCI-X slots (one 64-bit 133 MHz, two 64-bit 100 MHz); and 16X SuperDrive (DVD+R DL/DVDR/CD-RW).

Dual 2.0 GHz - £1,349; 512MB 400 MHz DDR SDRAM (4GB maximum); 160GB Serial ATA 7200 rpm hard drive; AGP 8X Pro graphics slot; ATI Radeon 9600 with 128MB DDR SDRAM; 3 PCI slots (64-bit 33MHz); and 16x SuperDrive (DVD+R DL/DVDR/CD-RW).