The Axiom 8GB DDR3 - 1333 SODIMM Kit is designed specifically for Apple devices, including various models of iMac and MacBook Pro. This kit includes two 4GB modules, providing a total of 8GB of DDR3 SDRAM with a speed of 1333 MHz (DDR3 - 1333/PC3 - 10600). The non - ECC, unbuffered design ensures reliable performance, while the 204 - pin SoDIMM form factor allows for easy installation in compatible devices. With this memory upgrade, you can expect smoother operation of applications, improved multitasking capabilities, and overall enhanced system performance.