In this article, Benchmark Reviews tests the Crucial m4 solid state drive against several of the fastest consumer storage devices available. Based on the Marvell 88SS9174-BLD2 SSD processor, this SATA 6 Gb/s drive is claimed to provide 415 MB/s reads and 260 MB/s writes with up to 90,000 IOPS. We've tested the Crucial m4 SSD against its older sibling, the Crucial RealSSD C300, to measure comparative performance differences. The 256GB model CT256M4SSD2 Crucial m4 also competes with the latest SandForce and Indilinx-based solid state drives, and our SSD test results show which product leads the consumer storage market.