Operating at 2000MHz and 9-9-9-28 @ 2.0V, the Crucial Ballistix 2GB Kit is a set of DDR3 memory specifically built for performance enthusaists who want to push the performance envelope without worrying about data loss or corrutpion, mysterious intermittent errors and display problems, or worse - the dread BSOD! The Ballistix line of high-performance memory modules features advanced speed grades, low latencies, and integrated aluminum heat spreaders. This set comes SLI-Ready for increased gaming potential!