AJ for OSXDaily:

The MacBook Air 2012 is a screamer, and though the CPU-based benchmarks show about a 15-20% improvement over the MacBook Air 2011 models, by far the biggest performance boost comes from the new flash memory (SSD) that Apple is using for storage on the 2012 models. In our tests, the disk used in the newest MacBook Air models is up to 217% faster than the previous model years drives.

iFixit’s breakdown shows that the new MacBook Air employs an SSD made by Toshiba, with a different connector than last year’s model – and a SandForce controller.