Engineered for Cost-effective performance The Kingston HyperX 3K Solid State Drives are designed and built for cost-effective performance. By leveraging the latest SATA 6Gbps interface and the second generation of SandForce SSD controller (SF-2281) which features the award winning DuraClass Technology, the HyperX 3K 120GB version pushes the limits in both sequential and random data transfer rates with up to 555MB/s read and 510MB/s write, plus incredible sustained 4KB read/write performance of 20,000/60,000 IOPS. This significantly improves your productivity, gaming, multimedia, and overall computing experience. It is backwards compatible with SATA II / 3Gbps. (Rated speeds may vary slightly depending on the benchmark used, drivers, windows version, bios version and file size.)