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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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    Top Favorable Review

    Upgrade the firmware!

    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. Read more
    — Dylan B. 7/1/2012

    Top Critical Review

    Does not recover well from power outages

    Fails to recover from power outages. Every time (and I mean every time, 4 for 4) there is a power outage with the computer it on, the bios has trouble recognizing the SSD. I bought 2 of these for 2 different systems and both systems saw this. ... Read more
    — Bryan R. 4/18/2013

    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

    Customer Reviews of the Crucial CT128M4SSD2

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    4 out of 5 eggs Based on 849 Reviews

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    • Christopher R.

    1 out of 5 eggs unreliable trash

    Pros: it's fast

    Cons: it's junk. totally unreliable. with this SSD as your system drive you will start to have random blue-screens and reboots and have no idea it's caused by the SSD unless you keep up with the CRUCIAL forums. It's a known issue that is supposedly addressed by a firmware update. But it still did it after the firmware update, and only got worse over time. Then one day the BIOS stops detecting it and you can't boot up at all and your data is inaccessible.

    Bottom Line: Don't use this SSD for anything CRUCIAL.

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

    • Brent S.

    1 out of 5 eggs Product failed, terrible support

    Pros: Product worked at times. Randomly turned off and usually had to wait a few minutes to a few hours for it to power back up. Happened on 2 motherboards, 2 power supplies, and 2 Windows 7 installs.

    It was fine when it worked. Nothing to write home about but it also wasn't bad.

    Cons: My problem is with how they supported it. For me, it's not about the problem but what you do to resolve it. Support is what Crucial severely lacks.

    It started when I spoke with the support. After I explained everything I did to troubleshoot it he began to suggest things he thought I needed to do. All of those things I already did which makes me think he wasn't even listening. After that he told me the drive probably failed because I don't let it idle enough. He said whenever an SSD is sitting idle it begins to do some garbage clean up and because it's my OS drive I should be booting in to the BIOS and letting it sit for 4+ hours every couple of days to prevent this. I have never read that anywhere and that paired with some of the other things he said made me feel like he didn't really know much about the product.

    Finally, he told me I could RMA it but he doesn't recommend it. He said that even though I have ~8 months left in my warranty I should try using it for the next 12-18 months to see if the SSD is really the problem. He told me even though my warranty would be expired they will still support me because "you can just tell them Crucial Support said it was alright". Yeah right!

    I set up the RMA and they send about 5 emails. The first 2 were "Thanks for resetting your password" (I don't even have an account). Then they sent me an invoice saying the replacement will ship soon as well as having another few paragraphs of gibber-jabber. They also had sent another email that had several paragraphs of stuff but ~75% seemed redundant. A week later I realized that even though it said it was shipping soon I needed to put a credit card on hold. This is fine and I did see it buried in the novel they sent me but I feel the information should be a little easier to read to avoid minor issues like this in the future.

    I then call up, give my RMA number, and credit card info. The guy says we're all good and I should expect it in a few days. I wait 2 weeks because it's the holidays and I figured they were slow (+ I had better things to do than hold their hand). When I email them they say I need to give them my CC info to process the advanced replacement. I tell them I did and they say they never got the call. I forwarded them a screenshot of my call history as well as the detailed history (call time/time, length, etc) and they claim they still do not see a record of it. They even said they look through the entire call log for the time my screenshot showed.

    I called in with my CC info and they processed it (email confirmation). I would like some compensation (maybe a bigger drive?) because this took a month in total but they really didn't care to hear about that. They just apologized and said they usually have great support but I have yet to see it.

    Bottom Line: Buyer beware that it might pay to spend an extra ~$15 for a company like Intel or Samsung who is more grateful for their customers.

    What's worse is I had just bought a Crucial M500 about a month before this happened. Had I know this is what I had in store should the drive ever fail I would have avoided them.

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    • JAMES D.
    • Verified Owner

    4 out of 5 eggs Still going strong after 2 years of use (crossing fingers and knocking on wood)

    Pros: It's an SSD. System speed and start up times are noticeably faster compared to more traditional, disc-based hard drives.

    I remember performing lots of research when I originally bought this SSD. At the time (mid-2012), the Crucial M4 product line had what seemed to be the least failure rates when compared to other SSD brands.

    My M4 SSD is still functioning to this day (crossing fingers and knocking on wood).

    Cons: The price. I remember paying $200-$250 for this SSD a couple of years ago. Posting this review on Newegg, I see that the price for this listing has not changed much since I bought it.

    Considering that I just recently bought another Crucial 250 GB SSD for $110 (a different product listing than this one), I consider the pricing for this specific product a serious rip-off. Thus, I am subtracting one egg.

    Bottom Line: People who are commenting about their SSD failure rates need to understand that all SSDs fail eventually. And when they fail (trust me, they will), they fail in such a way that renders the entire device useless.

    I believe SSD technology still has a long road ahead of it with regards to lifespan improvements. Those interested in making the jump to an SSD need to understand that no matter the product/brand you choose, it's very likely that the SSD will fail within a 4-year time frame. For those unwilling to accept this risk, I recommend just sticking with a traditional hard drive.

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    • Greg S.
    • Verified Owner

    1 out of 5 eggs SSD Fail!

    Pros: Very fast, booted up my computer in about 10 seconds or so.

    Cons: This drive outright failed before its 2 year mark. Blue screens of death started occurring, and eventually it outright failed. Can't even boot from it anymore.

    Bottom Line: I don't recommend getting this product, nor buying anything from crucial. Their customer support is horrible, they make up "excuses" as to why they can't provide a replacement. STAY AWAY!

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

    • Jeremy C.
    • Verified Owner

    2 out of 5 eggs SSD Not being recognized in Bios

    Pros: Low price, fast.

    Cons: This SSD has only lasted me a little over a year before it started to fail. Speed tests in windows index factor have decreased 2 points over the last year. It also will not load in bios more often.

    Bottom Line: Not a good SSD. DO not Buy!

    Did you find this review helpful? Yes No

    • Dawn G.
    • Verified Owner

    5 out of 5 eggs Super fast, super sweet...Nuff Said!

    Pros: Super fast. Never have had a problem with this drive.

    Cons: Little small to load all my to pick and choose what games to load.

    Bottom Line: Obviously go for the larger one now, but when I bought this they were a bit high priced.

    Did you find this review helpful? Yes No

    • Chris V.
    • Verified Owner

    5 out of 5 eggs Solid after almost 3 years of daily use.

    Pros: I just bench marked this drive a few days ago with CrystalDiskMark and its read/write speeds are still as advertised. This is after almost 3 years of daily use. Firmware upgrades were always painless. If you buy one now it should come with the latest firmware.

    Cons: None.

    Bottom Line: Obviously buy one of the new newer M500's or MX100's now. Great alternative to Samsung Evo.

    Did you find this review helpful? Yes No

    • Yan P.
    • Verified Owner

    5 out of 5 eggs Great SSD - no problems in over 3 years of onwership

    Pros: Fast and reliable - what else could one ask for in SSD?

    Cons: smallish size now

    Bottom Line: Been using this SSD for over 3 years now of daily use and as a main OS drive. Have upgraded firmware couple of times(painless process and didnt even have to reinstall OS ) and it never gave me any problems while always being as fast as they get pretty much. It was my first SSD and since then i have purchased over 10 different SSD(once you go SSD its very hard to go back to HDD of even hybrids for anything but pure storage needs) and while some were faster i still use this one as my OS drive in my main desktop. Will be buying larger size(since 128Gb is kind of limiting nowdays) M4 when prices drop a bit lower.
    Nothing but good for this little speedracer!

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    • Greg H.
    • Verified Owner

    2 out of 5 eggs Drive failure in 9 months

    Pros: SSD

    Cons: Failed within 9 months

    Did you find this review helpful? Yes No

    • Sean C.
    • Verified Owner

    1 out of 5 eggs SSD Fail!

    Pros: It's an SSD.

    Cons: This drive worked for while before giving me issues. I read that my mobo might not support SSD as it was an older system. Went back to my RAID0 x 3 and put the M4 off to the side and forgot about it as I could live without it.

    It's been a year and I have a new system as a home server. I can now verify it's a bad drive. It has the latest firmware and has this disconnect issue. Programs stop responding before Windows itself crashes. After the reboot the M4 isn't even listed in the bios. I have to cycle power, set it as a boot device again, and I'm up until it happens again. All drivers, bios, and SSD firmware up to date.

    I wish I RMA'd or got a refund. It was expensive then. An unreliable drive is as useful as War.
    singing - What is it good for? Absolutely nothing, oh hoh, oh!

    Bottom Line: Don't take my word for it. A little searching and you'll see this is quite common with this drive.

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

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    Item#: 9B20-148-442