The latest memory release from G.Skill, the Ripjaws DDR3 SO-DIMM Memory, is designed for laptop users. The memory kit runs on 1.35V allowing for less power consumption and heat generation for mobile systems where both issues are a large concern. These kits are available at operating frequencies of 1866MHz and 1600MHz and are compatible with third and fourth generation Intel Core processors. There will be four options at each frequency, 1x4GB, 2x4GB, 1x8GB, and 2x8GB.
Source: Press Release