Crucial Technology 8GB Kit (4GBx2), 204-pin SODIMM, DDR3 PC3-8500 Memory Module (CT2KIT51264BC1067)
In short, 204-pin small outline dual inline memory modules (SODIMMs) are the form factor used to provide DDR3 memory modules for notebook computers and other small form factor computing platforms. 204-pin SODIMMs are currently available in PC3-8500 (DDR3 1066MHz) speeds.