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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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Upgrade the firmware!

4 out of 5 eggs
Blazingly fast - benchmark puts it at a maximum of 533Mbit/sec with the correct SATA3 drivers installed! Except for the issue noted below, I have had zero problems with this drive.
— Dylan B. 7/1/2012


5 out of 5 eggs
Although I did not make this purchase from Newegg, I am totally satisfied with this SSD as a boot drive. It arrived with the updated firmware 009 and was instantly recognized by my ASUS P8P67 motherboard. If you have not yet converted to SSD as your boot drive, you really have no idea how much faster they are over the mechanical drives, including the 10,000 RPM mechanicals.
— Karl H. 12/3/2011

Quick Info


  • 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 839 Reviews

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  • Anthony D.
  • Verified Owner

5 out of 5 eggs I take back my other review

Pros: So my previous review from two days ago can be taken down (I don't know how to edit reviews, if that's even possible) - I should have done some homework on this drive to realize that I had the very first firmware version on this hard drive. After being on the phone with tech support, who are awesome at Crucial by the way, I was able to update my SSD to the latest firmware and get everything running again. This drive is so much faster than the platter drive I was using in the mean-time.

Cons: Updating the firmware was a bit time consuming with the BIOS resets and all, but not really a 'con,' just something you have to do to ensure proper functionality.

Bottom Line: Make sure to update the firmware when you get this if it's not at the latest firmware already, you should have no problems. I've had this drive for over two years now, if I get two more problem free years I'll be happy.

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  • Brandon G.
  • Verified Owner

5 out of 5 eggs Great Drive

Pros: Fast and cheap! Before this drive I went through 4 OCZ drives, it's pretty bad when the replacements for the original products die too!

Cons: None!

Bottom Line: I got one for my dad since I liked mine so much.

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  • Anthony D.
  • Verified Owner

3 out of 5 eggs Works great, for a while

Pros: When this drive was brand new and it was my first SSD, I couldn't believe how fast my computer would run. This this is an amazing drive for keeping your OS and main programs on.

Cons: I have had this drive for two years and two months, and just like Robert S. I was having BSOD's and a bunch of odd windows problems and resets. I had a spare hard drive lying around which I installed Windows on again, and now my computer has no problems at all.

Bottom Line: The warranty period for this drive is three years, I am going to try and contact Crucial when I get home and get this warranty process started. I will update this review when I find out how difficult or easy it is to get a replacement drive.

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  • Sean B.
  • 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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  • Jeffrey Y.
  • 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 4 people found this review helpful. Did you? Yes No

  • Robert S.
  • 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.

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

  • Terence R.
  • Verified Owner

5 out of 5 eggs Great customer service

Pros: Smooth deal ! Thanks Miranda and Monica

Cons: None

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  • Adam S.
  • 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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  • Micheal M.
  • 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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  • Kevin B.
  • 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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Item#: 9B20-148-442