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Crucial’s m4 SSD is a SATA III interface compatible device that can easily reach a maximum sequential read speed of 500 MB/s and sequential write speed of up to 260 MB/s. This NAND MLC flash type SSD is powered by a Marvell 88SS9174-BLD2 controller which similar to Corsair’s Performance Pro SSD. The maximum IOPS (512 GB) for 4k random read is 45,000 and 50,000 for 4k random write.

The m4 is among the lowest power consuming SSDs in the market as it only dissipates 0.15 W when active and 0.065 W when idle. EDC and ECC are supported by this solid state drive as well as TRIM commands for Windows 7. Multiple RAID configurations is also possible and S.M.A.R.T. is also present. The Mean Time Between Failure for this device is 1.2 million hours with a warranty of three years.


  • Sequential Read: Up to 500 MB/second
  • Sequential Write: Up to 260 MB/second
  • NAND type: MLC
  • Interface: SATA 3 6GBps
  • Controller: Marvell 88SS9174-BLD2
  • Form Factor: 2.5 inches
  • DRAM Cache: None
  • Power Consumption (Active): 0.15W
  • Power Consumption (Idle): 0.065W
  • Warranty: 3 years
  • MTBF: 1,200,000 hours

Part Numbers:

  • 64GB: CT064M4SSD2
  • 128GB: CT0128M4SSD2
  • 256GB: CT0256M4SSD2
  • 512GB: CT0512M4SSD2



I’m not sure whether to call the m4 an evolutionary upgrade in performance or a shift in performance. Write speed is faster across the board, but read speed took a definite hit compared to the C300. Overall Crucial has a faster drive on its hands, one that’s particularly well suited to most of our lighter workloads. It’s only in our new 2011 heavy multitasking workload that the m4 really fell short. For your average desktop usage model, the m4 is either the best or second best you can get.


The Crucial m4 128GB SATA III SSD performed much better than I thought. The assumption of a slower product was based on the 256GB drive we received from Crucial a couple of months ago. Little did we know that our 256GB drive had been ran prior to us taking possession, so our apples to apples comparison with other retail products didn’t pan out. We are currently retesting the 256GB model after getting the drive back into our controlled steady state. Look for a full report on the 256GB and 64GB m4 in a week or so.


As you can see, the Crucial M4 was by far the least expensive drive looking at its cost per GB. If you want a high capacity drive and work with lots of incompressible data, the M4 is a fine choice.

Best Prices:

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