If you are puzzled about that your computer is not running fast enough, caused by poor memory. This is a high speed DRR3 memory ram, which provides better performance and less consumption, so that you can work efficiently on your computer. Features: Professional DDR3 Memory Ram, high stability and excellent compatibility, use on different motherboards. Support for Intel 1.5V low voltage standard, improve energy efficiency, and ensure green and reliable operation. Built-in High quality chip, allows stable performance and high speed running. 1600MHz high memory speed, improves the speed of the computer and brings convenience to your life. 4G large capacity provides powerful performance and storage space for daily reading and writing. Easy Contact and Installation: The gold finger interface ensure perfect contact and stable installation, easy to insert and remove. High-quality circuit module board, efficiently avoids from corrosion and abrasion, durable and portable to use. Specification: Color: As the pictures show Compatibility: For Laptop Memory Type: DDR3 Capacity: 4GB Memory Frequency: 1600MHz Size: Approx. 6.8 x 3 x 0.2cm/ 2.7 x 1.2 x 0.1in Package Weight: 19g Package list: 1 x Memory Ram About memory: Memory ram is divided into SD, DDR, DDR2, DDR3, please refer to the following list to know what memory your computer needs and what memory you should buy: PC2100 DDR 266 PC2700 DDR 333 PC3200 DDR 400 PC4200 DDR2 533 PC4300 DDR2 533 PC5300 DDR2 667 PC6400 DDR2 800 PC8500 DDR3 1066 PC10700 DDR3 1333 PC3-12800 DDR3 1600 Note: Please DO NOT force to install if the memory ram is not suitable to your computer, because that will damage the memory and motherboard. Some Tips: 1. The color of different batches of product PCB board may also be different, these do not affect normal use and performance. 2. DDR stands for 1st generation memory, DDR2 stands for 2nd generation memory, DDR3 stands for 3rd generation memory; 1600 in DDR3 1600 means memory frequency is 1600MHz, common memory frequency is 1333, 1600, 1866, 2133, 2400, etc. The higher the frequency, the faster the speed. 3. The same generation of memory, the frequency can be backward compatible. For example, DDR3 is compatible with 1333, 1600, 1866, and other frequency, 1866 can be used on the motherboard supporting 1600 or 1333, but it will be used for frequency reduction. 4. Please refer to the relevant parameters of your PC before purchasing the memory, such as the maximum frequency that the motherboard can support, the maximum capacity supported by the single slot, etc., please make sure the overall hardware parameters before purchase! 1、Professional DDR3 Memory Ram, high stability and excellent compatibility, use on different motherboards. 2、Support for Intel 1.5V low voltage standard, improve energy efficiency, and ensure green and reliable operation. 3、Built-in High quality chip, allows stable performance and high speed running. 4、1600MHz high memory speed, improves the speed of the computer and brings convenience to your life. 5、4G large capacity provides powerful performance and storage space for daily reading and writing.