Matt EganMacworld U.K.

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Matt is editor-in-chief of IDG U.K.'s Tech Media Group, including Macworld, PC Advisor, Tech Advisor and Digital Arts. A passionate technology fan who covers subjects as diverse as internet security, mobile technology, social media and Windows, in his spare time Matt enjoys playing golf (badly) and singing in a band (also badly).

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What is Crystalwell?

The Haswell processors in the 15-inch Retina MacBook Pro have a feature called Crystalwell. It's a part of the integrated graphics subsystem that can have a positive effect on performance.