While big-screen notebooks have become popular these days, Lenovo has taken the trend one step further. Its Lenovo ThinkPad W700ds mobile workstation has two screens, together with a quad-core processor and the best graphics this side of a desktop PC.

(According to Lenovo, the notebook will be available as soon as it is officially announced at CES this week.)

In other words, Lenovo's ThinkPad W700ds bends and breaks many of the rules of mobility. But beware: this weighty notebook has a weighty price tag to match - over £3,500.

At 4.96kg and measuring a gargantuan 410x310x522mm, the Lenovo ThinkPad W700ds is about as big as a notebook gets these days. With its huge AC adapter, the Lenovo ThinkPad W700ds has a ponderous travel weight equivalent to four of Apple's MacBook Air systems; it's sure to overwhelm any airline tray table.

Clothed in ThinkPad basic black, the Lenovo ThinkPad W700ds has the best components available, starting with a 2.53GHz Intel Core 2 Extreme processor that has four independent processing cores, 6MB of L2 cache and 64-bit operations.

There's also 4GB of memory, an 8x DVD burner and a pair of 250GB, 5,400rpm hard drives that are set up to stripe data across the disks (higher-performance 7,200rpm drives are also an option). Whether it's for working with a CAD file or making sense of a large Excel file, no notebook on sale today even comes close to the Lenovo ThinkPad W700ds - a computational monster.

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