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    Ultrabook vs ultrabook: Aspire S3, IdeaPad U300s, Portege Z830, and UX21 go head to head

    Ultrabook vs ultrabook: Aspire S3, IdeaPad U300s, Portege Z830, and UX21 go head to head

    By Patrick Austin

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    All the ultrabooks at IFA 2011, plus the MacBook Air in a cameo appearance. Not to be missed!