The Asus Zenbook is the latest Ultrabook-class laptop to go official. Competing against the Acer Aspire S3 and MacBook Air, the UX31 (and the smaller UX21) Zenbook attempts to combine thin form factors with real-world performance without sacrificing in either category.
The 13.3-inch UX31 Zenbook has a 1600 x 900 resolution, weighs 2.9 pounds, packs an Intel Core i5 or Core i7 processor, up to a 256GB SSD and USB 3.0. Additionally, it has a multitouch trackpad, Bang and Olufsen-powered sound and has 4GB RAM. The battery is rated to last 7 hours while on, and 10 days in standby mode. Additionally, Asus says their laptop has a two second instant-on time.
Meanwhile, the smaller, 11.6 inch Asus UX21 also has a Core i5 or Core i7 processor, 128GB SSD, and 4GB RAM. It's only 0.35-inches at its thickest point and only weighs 2.43 pounds. The screen has an HD-caliber 1366x768 resolution and a five hour battery life.
Both the UX31 and UX21 Zenbooks will be available starting today in the US (other countries not known yet), beginning at $1100 (around £705 if converted directly) and $1000 (around £640), respectively. While Asus hasn't confirmed UK pricing and availability, we do know that the UX21 and UX31 will cost a minimum of £1,000 here.
Updated: We've got the pricing and full specs of both the UK models of the UX21 and UX31, as below.
The 11.6-inch UX21 will run on an Intel Core i5-2467M chip with 4GB DDR3 RAM and a 128GB SSD. At the front, it measures 3mm thick, and at the back it'll be 11mm thick. The price-tag of this model will be £849.
The beefier, bigger UX31 will run on an Intel Core i7-2677M chip, with 4GB of DDR3 RAM and a 128GB SSD too. Like the UX21, it measures 3mm at the front, and 11mm at the back. £999.