CES 2012: Acer started their CES unveiling with quite the bang, showing off its second ultrabook, the Acer Aspire S5. The Aspire S5 is due for a Q2 arrival, is just 15mm thick and weighs under 1.35kg.

It sports an Onyx Black magnesium-aluminum alloy cover, a 13.3-inch LCD screen, chiclet keyboard, an Intel Core processor, a solid state drive, and a MagicFlip I/O port panel, which includes HDMI, USB 3.0 and Thunderbolt connectors. Thunderbolt, on an ultrabook? Very good news for 2012 products.

Acer also include their Green Instant On technology which provides super fast booting and resume, and the Always Connect solution which enables users to 'manage their multimedia and data on all their devices at anytime, anywhere'. At the moment, there's no details on Aspire S5's pricing.