When measuring the write performance the Intel SSD 520 Series 240GB maxed out a 502MB/s whereas drives such as the OCZ Vertex 3 240GB went on to reach 518MB/s making it 3% faster. It is interesting to note that the SSD 520 Series 240GB maxed out at 502MB/s for both the read and write Atto Disk Benchmark tests when working with 128K data.