MACBOOK AIR MD508 I5-2467m 1.6Ghz ram 4Gb ssd 128GB A1369 - 2469 MacbookAir 4.2
Quietly introduced without a press release, the MacBook Air "Core i5" 1.6 13" (Mid-2011/Education Only) -- which only was available for sale to educational institutions in quantities of five or more -- is powered by a 32-nm "Sandy Bridge" 1.6 GHz Intel "Core i5" processor (2467M) with two independent processor "cores" on a single chip and a 3 MB shared level 3 cache.
It is configured with 2 GB of onboard 1333 MHz DDR3 SDRAM (which cannot be upgraded after purchase), 64 GB of flash storage, and an Intel HD Graphics 3000 graphics processor with 256 MB of DDR3 SDRAM shared with system memory.
This all is packed in a razor thin (0.11-0.68 inch), 2.96 pound, aluminum case with an integrated "FaceTime" video camera, a backlit full-size keyboard and an 13.3" widescreen TFT LED backlit active-matrix "glossy" display (1440x900 native resolution).
Connectivity includes 802.11a/b/g/n Wi-Fi, Bluetooth 4.0, dual USB 2.0 ports and analog audio out as well as an SDXC card slot and a "Thunderbolt" port that is backwards compatible with Mini DisplayPort and likewise supports an external display at 2560x1600 and passes an audio signal as well. Thunderbolt also supports other peripherals that use the Thunderbolt standard which provides up to 10 Gbps of bandwidth in both directions. It lacks internal Ethernet (an external USB adapter was offered as a US$29 upgrade) and lacks Firewire and optical audio in/out as well.
Compared to the "standard" MacBook Air "Core i5" 1.7 13" (Mid-2011), this model is externally identical, but it has a slower processor, less memory (which, again, cannot be upgraded after purchase) and less storage as well. However, it is less expensive per unit, too.
Also see: What are all the differences between the education-only "Early 2012" MacBook Air and the standard 13-Inch "Mid-2011" MacBook Air?