OWC 240GB Aura Pro 6G Solid-State Drive Upgrade for 2012 MacBook Air OWC's 240 GB Aura Pro SSD designed for MacBook Air 2012 provides upgrades from the original factory options 240GB useable capacity, Tier 1 Major Multi-Level Cell (MLC) High-Performance Sync-NAND Flash, Sustained Reads 501 MB/s, Sustained Writes 503 MB/s Ultra-efficient block management & wear leveling Compatible with: MacBook Air 13-inch (Mid 2012 Model ID:MacBookAir5,2) (2012 Educational Model ID:MacBookAir4,2) MacBook Air 11-inch (Mid 2012 Model ID:MacBookAir5,1) 5 Year OWC Limited Warranty <span class="a-text-bold">DuraWrite</span>extends the endurance of your Solid State Drive (SSD). <span class="a-text-bold">Intelligent Block Management &amp; Wear Leveling</span>automatically distributes data evenly across the entire SSD. <span class="a-text-bold">Intelligent Read Disturb Management</span>spreads the active read/write across the flash components eliminating data corruption caused by constant use. <span class="a-text-bold">Intelligent &#034;Recycling&#034;</span>for advanced free space management gradually re-writes data across the SSD over time to ensure data never gets corrupted. <span class="a-text-bold">RAISE</span>(Redundant Array of Independent Silicon Elements) protects the data on your drive similar to having a RAID setup. <span class="a-text-bold">Best-in-Class ECC Protection</span>for longest data retention and drive life. MacBook Air (13-inch Mid 2012)(June, 2012) Model ID: MacBookAir5,2 (1.8GHz, 2.0GHz) MacBook Air (11-inch Mid 2012)(June, 2012) Model ID: MacBookAir5,1 (1.7GHz, 2.0GHz) MacBook Air (13-inch 2012)Education Model(July, 2012)Model ID:MacBookAir4,2(1.7GHz) MacBook Air (13-inch Mid 2011)(July 2011)Model ID: MacBookAir4,2 (1.7GHz, 1.8GHz) MacBook Air (13-inch Late 2010)(October 2010)Model ID: MacBookAir3,2 (1.86GHz, 2.13GHz) MacBook Air (11-inch Mid 2011)(July 2011)Model ID: MacBookAir4,1 (1.6GHz, 1.8GHz) MacBook Air (11-inch late 2010)(October 2010)Model ID: MacBookAir3,1 (1.4GHz, 1.6GHz)