MacBook Air 13" (Mid 2013-Early 2014) 1.3 GHz Logic Board
Review: 13-inch MacBook Air (mid-2013) - 9to5Mac
A-Tech 16GB Kit (2x8GB) RAM for Apple MacBook Pro (Mid 2012), iMac (Late 2012, Early/Late 2013, Late 2014, Mid 2015), Mac Mini (Late 2012) | DDR3 1600MHz PC3-12800 SODIMM 204-Pin Memory Upgrade at Amazon.com
MacBook Air 11" Mid 2013 Teardown - iFixit
Amazon.com: Odyson - Logic Board 1.3GHz i5 (i5-4250U), 4GB RAM Replacement for MacBook Air 11" A1465 (Mid 2013) : Electronics
MacBook Air (11-inch, Mid 2013) - Technical Specifications
MacBook Air 13" Mid 2013 Teardown - iFixit
MacBook Air (13-inch, Mid 2013) - Technical Specifications