Apple has updated its iMac line, with three new models featuring Intel Core 2 Duo processors and 2GB of memory.

The new iMacs run at up to 3.06GHz and are equipped with 6MB L2 cache together with a significantly faster front side bus, which reaches 1,066MHz across the range.

The new models have faster CPUs across the board and now peak out at 3.06GHz on the top-end 24in model; which also features Nvidia's new GeForce 8800 GS graphics card. As with the latest range of MacBooks, the new iMacs can support up to 4GB of memory, although 2GB of RAM comes as standard. Other models in the range feature faster CPUs but retain the ATI Radeon graphics cards.

"The iMac's gorgeous aluminium and glass all-in-one design has been an incredible hit with our customers and is just one of the reasons Mac sales are growing three and a half times faster than PC sales, " said Phil Schiller, Apple’s senior vice president of worldwide product marketing. "With the latest Intel processors, a faster new graphics option and more memory, customers now have even more reasons to love the iMac."

These iMacs support up to 4GB of 800 MHz DDR2 SDRAM memory (shipping with 2GB pre-installed in most models). AirPort Extreme, iLife 08, Leopard, Bluetooth, Gigabit Ethernet; built-in iSight video cameras; a total of five USB 2.0 ports (including two on the Apple Keyboard); and one FireWire 400 and one FireWire 800 port also feature in this edition.

Addressing environmental concerns, Apple said: "The iMac furthers Apple’s commitment to environmental progress with highly recyclable and durable materials including scratch-resistant glass and professional grade aluminium. Every model in the iMac line is rated EPEAT Silver and the power-efficient iMac also meets the stringent Energy Star 4.0 requirements for power consumption. Customers who purchase any qualifying Apple computer can recycle their old PC or Mac for free via the Apple Recycling Program."

See Macworld UK for the full specs.