Apple has refreshed its iMac line of desktop PCs aimed at consumers, with Intel Core 2 Duo processors, new graphics tech, double the memory and up to 1TB of storage.

There are four models now on offer. The entry-level model for £949 is a 20-incher and offers a 2.66GHz Intel Core 2 Duo processor, 2GB memory, 320GB hard drive, 8x double-layer SuperDrive and NVIDIA GeForce 9400M graphics.

The £1199 option has a 24-inch display, 2.66GHz Intel Core 2 Duo processor, 4GB RAM, 640GB hard drive, 8x double-layer SuperDrive and NVIDIA GeForce 9400M graphics.

For £1499 the next level up 24-incher improves the specs slightly with a 2.93GHz processor and better graphics - with NVIDIA GeForce GT 120 with 256MB memory.

The top-of-the-line model is the 24-inch £1799 iMac that offers a 3.06GHz processor, 1TB hard drive and NVIDIA GeForce GT 130 with 512MB memory.

Every iMac gets a love-it-or-hate-it glossy display with a built-in iSight webcam, mic and speakers in a thin aluminium and glass design.

The new iMacs also include a Mini DisplayPort connector for a "pure" digital signal to Apple’s new 24-inch LED Cinema Display with adapters available for DisplayPort, VGA, DVI and Dual-Link DVI displays.

iMacs include built-in AirPort Extreme 802.11n Wi-Fi networking, Bluetooth 2.1+EDR, Gigabit Ethernet, a total of six USB 2.0 ports and one FireWire 800 port.

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