Asus Zenbook UX31
Of all the Ultrabooks we've previewed so far, including the Acer Aspire S3 Ultrabook and the Toshiba Z830 Ultrabook, it was the Asus ZenBook UX21 and UX31 models that really wowed us.
Weighing an incredibly light 1.3kg and only 17mm thick at its widest point, the Asus ZenBook UX31 is an amazingly compact laptop. A tapered design means the thinnest edge is a miniscule 3mm, which matches the tiny dimensions of the 13in MacBook Air. The brushed aluminium chassis is sleek and refined, but also incredibly strong – the lid refused to buckle under pressure and we couldn’t spot any flex in the keyboard tray.
The full-size QWERTY keyboard was excellent to type on, thanks to its isolated keys that were well spaced. Despite having very little travel, each key felt springy and responsive, so we could type at full speed right away. Below it, Asus has managed to squeeze in a large brushed metal touchpad - both the pad and its buttons are machined from a single piece of aluminium, but it has none of the problems of other all-in-one touchpads we’ve seen as pressing the buttons doesn't jog the mouse cursor. With minimal friction and responsive buttons, we could easily navigate the Windows desktop without any trouble.
With space at a premium, Asus has used micro-HDMI and mini-VGA video outputs; plus there's a multi-format memory card reader, two USB ports and a combination audio jack. We were slightly disappointed that only one of the two USB ports supports the faster USB3 standard, but at least the cleverly designed power adaptor doesn’t block that port when it’s plugged in to the mains.
In spite of its size, Asus has still managed to fill the ZenBook UX31 with some high performance hardware, including an ultra-low voltage version of Intel’s excellent Core i7 processor. The dual-core i7-2677M normally runs at 1.8GHz, but can Turbo Boost up to 2.9GHz when extra power is needed. Paired with 4GB of RAM and a super-fast 128GB SATA III SSD, it flew through our benchmarks with an overall score of 47. This might not make it a match for desktop machines, but frequent travellers will have more than enough power for almost every task.
By comparison the 13-inch Apple MacBook Air (Mid 2011) only scored 43 in the same benchmark.
Unsurprisingly given its slim chassis, Asus hasn’t been able to add a dedicated graphics card to the UX31 – instead, it uses the graphics chip integrated into Intel’s processor, which is easily powerful enough to play high definition video. We could watch 720p video on the laptop, or 1080p files on an external display, but it isn’t well suited to modern games. It managed just 14.5fps in Dirt3, which means you’ll have to drop the detail settings right down to play new titles, although older games will fare better.
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