Dell Studio XPS 1640: Source: www. dell.com Break the boundaries of work and play. Dell XPS 12 Convertible Touch Ultrabook: This touch-enabled 12″ convertible laptop combines the fun of a Windows 8 touch tablet with the power and productivity of an Ultrabook™. Chipset Mobile Intel® QS77 Express Chipset Audio and Speakers Realtek ALC3260; dual digital-array…