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Item#: 9B20-148-442

Crucial M4 CT128M4SSD2 2.5" 128GB SATA III MLC Internal Solid State Drive (SSD)

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  • Limited Warranty period (parts): 3 years
  • Limited Warranty period (labor): 3 years

Hungry for more? The new m4 SSD built on the success of the award-winning, wildly popular Crucial RealSSD C300 solid-state drive offers mobile and desktop users scorching-fast read and write speeds, groundbreaking SATA SSD computing, and unparalleled performance for the dollar.

The Crucial m4 incorporates Micron's industry-leading 25nm NAND flash technology in a 2.5" form factor. It also supports the SATA 6Gb/s interface, opening up the data path between the host processor and the SSD, and resulting in improved overall system responsiveness, including faster boot times and application loads. The Crucial m4 SSD reaches read speeds of up to 415 MB/s, a 17% increase over its predecessor. Ideal for client computing, Crucial m4 SSD provides benefits for notebooks, desktops, workstations, and industrial applications, including low power consumption, lightweight construction, and resistance to shock and vibration.


  • newegg Speed Demon Continuing the tradition of the award-winning RealSSD C300 solid-state drives, the Crucial m4 offers mobile and desktop users unparalleled read and write performance at its price range, including up to 415MB/s Sequential Read, up to 175MB/s Sequential Write and 35K IOPS for Random 4k Read (128GB @ SATA 6Gb/s, measured using Iometer with a queue depth of 32 and write cache enabled).
  • newegg Latest and Greatest Designed for client computing, the Crucial m4 SSD delivers faster boot and application load times for mobile and desktop users alike. Low power, lightweight, and durable, it empowers high-speed synchronous MLC NAND, advanced controller technology, optimized NAND management, and the second-generation SATA 6Gb/s interface. Together, that technology dramatically improves data transfers for bandwidth demanding applications.
  • newegg Memory Experts Delivering on the highest quality based upon Micron’s leading-edge NAND media, the Crucial brand of SSDs has long been synonymous with reliability and high performance. And because Crucial is part of Micron, the m4 was bred and built entirely in-house. So you can rest assured you’ll get one of the highest quality products available—from the company that knows memory.
  • newegg SSD Advantages SSDs provide many benefits over traditional hard drives. You’ll enjoy reduced power consumption, less heat generation. Because they have no moving parts, SSDs are quiet, more lightweight, and they’re rugged and reliable even in the most demanding operating environments or temperature extremes.


Learn more about the Crucial CT128M4SSD2


Device Type
Internal Solid State Drive (SSD)
Used For


Form Factor
Memory Components


Sustained Sequential Read
Up to 500MBps (SATA 6Gbs)
Sustained Sequential Write
Up to 175MBps (SATA 6Gbps)
4KB Random Read
Up to 45,000 IOPS
4KB Random Write
Up to 35,000 IOPS
1,200,000 hours


Integrated 8-channel single chip Controller

Self-monitoring, analysis, and reporting technology (SMART) command set

RAID Support

Average Access Time < 0.1 ms

Data Reliability: Built-in EDC/ECC


Power Consumption (Idle)
< 85 mW
Power Consumption (Active)
Operating Temperature
0°C ~ +70°C
Storage Temperature
-40°C ~ +85°C
Max Shock Resistance

Manufacturer Warranty

3 years limited
3 years limited

Customer Reviews of the Crucial CT128M4SSD2

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4 out of 5 eggs Based on 836 Reviews

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  • Anonymous
  • Verified Owner

5 out of 5 eggs Great SSD

Pros: Bought this card over a year ago, I have not had any issues what so ever with it. Great Speed

Cons: None at all

Bottom Line: Want to buy another!

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  • Jeffty
  • Verified Owner

5 out of 5 eggs Solid Drive

Pros: Great SSD. Not SATA 3 but definitely a great purchase

Cons: Not SATA 3

Bottom Line: Firmware is great

0 out of 1 people found this review helpful. Did you? Yes No

  • Cotasnoova
  • Verified Owner

1 out of 5 eggs Dead.

Pros: Worked great!

Cons: Just like so many others are experiencing, this drive started to fail out me. Computer freezing, hard resets, blue screens of death. What a pain.

Bottom Line: Installed Windows on spare SSD and computer is back to working like a champ.

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  • Anonymous
  • Verified Owner

5 out of 5 eggs Great customer service

Pros: Smooth deal ! Thanks Miranda and Monica

Cons: None

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  • Anonymous
  • Verified Owner

4 out of 5 eggs Still functional after 3 years

Pros: Still functional after 3 years, nice speed

Cons: About a year or so into using this I had the same problem a lot of you are explaining in other reviews. My PC would freeze about every 50 minutes. This was due to the terrible firmware initially installed. It had a built-in "death" timer, so to speak, so after so many reads/writes, it would just shut itself off after 50 minutes every time it was repowered (every PC reboot). So I had to figure out how to reinstall the updated firmware which didn't have that awful "death" timer. So, you should try updating the firmware if you are experiencing these issues.

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  • Anonymous
  • Verified Owner

1 out of 5 eggs Great Until It Just Died

Pros: Very Fast

Cons: Died just 7 days after the warranty went out.

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  • Anonymous
  • Verified Owner

5 out of 5 eggs 128 GB SSD

Pros: Fast boot times, well just fast overall.
not the fastest but is a good value drive

Cons: If shut down your PC improperly the drive will not be visible till you let it sit with the power on for a few minutes (you have to re-select it as a boot drive if you have multiple hard drives). It gives you a heart attack the first time then just becomes an inconvenience.

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  • Anonymous
  • Verified Owner

2 out of 5 eggs 2 years and done

Pros: Fast and I got it on sale for an excellent price. Was very easy to install and use.

Cons: Just after two years of normal use as a boot drive and I started having issues. About 45-60 minutes after my computer was on, regardless of type of use, the computer would lock up or reboot. Sometimes I would get a blue screen and error message but most of the time nothing. The computer would reboot and hang during the process and not recognized my normal HDD or this SSD. I ran through all kinds of trouble shooting to include replacing the MOBO before reading reviews here of people having the same problem.

Bottom Line: I will test out the RMA process with Crucial but I do not have very high expectations of success. IF I do get a working drive from them I will only use it as a hybrid drive that has no long term data storage.

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  • Abdulrahman
  • Verified Owner

2 out of 5 eggs It gets slower over time

Pros: SSD 128GB
Solid and still running

Cons: Well, I was happy for only about a year and it started getting slow over time. I tried every thing possible including formating it, install drivers from website, and tweaking it, but it seems it doesn't really get better.
I remember when I first use it, it was like 6 to 9 seconds to load up windows, now it takes about 35 to 45 seconds to load up. And guess what, I only used about half of it because I have 2TB WD and all of my stuff on it.
I gave it 2 eggs because i was happy with it for awhile, though it is not worth even the extra one egg.

Bottom Line: I ordered a new Samsung 840 Pro 256GB and it should be more efficient than this.

1 out of 1 people found this review helpful. Did you? Yes No

  • ClickerSnapper
  • Verified Owner

2 out of 5 eggs after 1 year of ownership

Pros: worked well until epic fail.
S.M.A.R.T Failure
Warranty process was good sent 2 back. Crucial paid shippping both ways. Refurb came in working ( for how long?) I use these 128 in client workstation enviroment. I have 1 250 gig in a data pump (server) next to Scsi U320 seems to be holding it's own. Fast! definatley noticeable campared to mechanical SCSI and SAS.
17 year Sys. Admin.

Cons: SSD evidently has dependabilty issues. these are the first that I bought
Have bought others and some 250gig ( they working as of the time of this review)

Bottom Line: I will keep supporting the SSD enviroment.

2 out of 2 people found this review helpful. Did you? Yes No

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Item#: 9B20-148-442