Where are you getting those specs? I googled, for the MBA 2014: http://www.everymac.com/systems/apple/macbook-air/specs/macbook-air-core-i7-1.7-13-early-2014-

Where are you getting those specs? I googled, for the MBA 2014: http://www.everymac.com/systems/apple/macbook-air/specs/macbook-air-core-i7-1.7-13-early-2014-specs.html http://www.everymac.com/systems/apple/macbook-air/specs/macb... For the new Macbook you are right that Apple appears to use a slightly faster variant of the 5Y70 that doesn't seem to have a benchmark on cpubenchmark.net yet (at least I couldn't find it). I'd be surprised if these 300MHz made a significant difference, though.