The eye-catching Ballistix 4GB DDR3 1600 Unbuffered RAM is a fast and reliable memory solution for enthusiasts and mainstream users alike. Featuring heat spreaders for thermal performance, this product is a great choice for gamers of varied abilities. RAM Features Form Factor: UDIMM Capacity: 4 GB Speed: DDR3 1066 Voltage: 1.5V Timing: 9-9-9-24 Dimensions: 133.35mm x 30mm