The Crucial v4

Overall the drive shares a design similar to the m4, though the two are not alike. Even though the v4 is a budget SSD, the case is made out of metal.

The v4 packaging doesn't include any fancy add-ons: There is the drive and mounting screws.

Since Crucial is a subsidiary of Micron, it’s not surprising to find Micron’s NAND inside the v4. What is a bit surprising is that Crucial has opted to use only eight NAND packages in the 256GB model, even though there are sixteen NAND sockets on the PCB. Each package works out to be 32GB (4x 8GB die) and are manufactured using IMFT’s 25nm process. As the v4 is a budget and “stock cleaning” model, I wouldn’t be surprised to see varying NAND configurations even among the same capacities. If there is more demand for 32GB packages, Micron may opt for sixteen 16GB packages instead to be able to clear 25nm NAND stocks as efficiently as possible.

The Phison PS3105 is an 8-channel SATA 3Gbps controller, similar to most consumer grade controllers. It's fabricated using a 90nm process and comes in a 324-pin BGA package but further specifics about the controller are unkown. TRIM and Native Command Queuing (NCQ) are, however, supported. There is also 128MB of LPDDR-333 acting as a cache, which is the minimum for the PS3105. Those unfamiliar with the Phison name might find it interesting to hear that their controllers are often found in budget USB flash memory devices (where performance is often a minor concern).

Test System


Intel Core i5-2500K running at 3.3GHz (Turbo and EIST enabled)


AsRock Z68 Pro3


Intel Z68

Chipset Drivers

Intel + Intel RST 10.2

Memory G.Skill RipjawsX DDR3-1600 2 x 4GB (9-9-9-24)
Video Card XFX AMD Radeon HD 6850 XXX
(800MHz core clock; 4.2GHz GDDR5 effective)
Video Drivers AMD Catalyst 10.1
Desktop Resolution 1920 x 1080
OS Windows 7 x64


Introduction Random & Sequential Read/Write Speed


View All Comments

  • andrejg - Tuesday, November 27, 2012 - link

    I thought the same until - I had two PC's of similar capacity with windows 8 side by side. One had Samsung SSD 830 256 and the other had Crucial v4 128.
    Difference was noticable, from start/boot to installations and other operations. They are both very good comparing to HDD, but Samsung rocks and Crucial is only faster than HDD.
  • supercoffee - Thursday, November 22, 2012 - link

    I'm no expert, but I thought SSD read performance was generally always higher than write performance. If this is the case, then the average read and write speed charts on the Storage bench 2011 page are wrong and should be fixed. Thanks. Reply
  • Kristian Vättö - Friday, November 23, 2012 - link

    When you read data, you have to fetch it from the actual NAND. When writing, you can first cache the data and write it to NAND at a later date (works well with small IOs as they can then be combined to increase throughput). Writing to a cache is extremely fast and hence write speeds are often higher.

    Sequential read speed at bigger IO sizes is definitely higher, but most of the actual usage IOs are somewhat random and small in size. Big sequential IOs are easy to read because you get the benefit of multiple dies but the smaller the IO and queue depth, the less interleaving can be done. For example, 4KB random read at QD1 is often limited by NAND bandwidth because you can only read from one NAND die at the time, which isn't all that fast.
  • iwod - Thursday, November 22, 2012 - link

    I mean the majority of cost for SSD goes to the NAND, there is no point trying to save a dollar or two and offer such inferior product, Those who are going to spend $100 and buy comparatively expensive HDD replacement would not have cared about the $10 dollars difference if it offer something like 5x less performance.

    Those who only owns a SATA 1 / 2 Port would have wanted a much faster SSD now for so they could get faster performance if they upgraded their MB.

    So in reality this strange line of product is aiming squarely at those who have absolutely no clue about SSD performance or OEMs builders who could simply rip more off from customers.

    The only niche i think this fits in are PATA, UATA port, where old computers could immensely benefits from SSD.
  • kmmatney - Friday, November 23, 2012 - link

    What this review is sorely lacking is any sort of real-life experience with the drive. Does it still "feel" like an SSD in actual use? Does windows boot up fast? I'd buy a lower performing Crucial SSD over a faster OCZ drive, as long as itis "fast enough". Reply
  • toine_r - Saturday, November 24, 2012 - link

    Unfortunately, I bought one (the 128Gb version) before this article has been published (17-11-2012).
    I strongly suggest buying another "real" SSD, because this one is not fast enough for day to day use, even for replacing a HDD.
    I replaced a 5400rpm HDD with it on a netbook running Ubuntu, and the SDD was slower than the HDD for some operations (typically, installing packages and applications took hours on the SSD).
    Experience on windows may be better, but its probably safer to buy another one.
  • Dustin Sklavos - Friday, November 23, 2012 - link

    I love Crucial's stuff and would easily recommend the m4 personally, but...

    This has to be one of the worst products we've reviewed all year. I'm kind of in awe of how terrible it really is, the only way you could justify it compared to what else is available is to sell it at half the cost of any other SSD with comparable capacity.
  • cjs150 - Friday, November 23, 2012 - link

    Great response Dustin - I only which I had written it. Reply
  • KAlmquist - Saturday, November 24, 2012 - link

    With a metal case (instead of plastic) and synchronous NAND (instead of asynchronous) it's like Crucial wasn't even trying to hit a price point where an SSD with the Phison controller would make sense. Reply
  • Impulses - Wednesday, November 28, 2012 - link

    As brutal as the review was, it was still too kind! The first budget SSD that one of the major players put out (Intel's X25-V) still manages random read/write performance that's about 3x faster! Granted that drive had abysmal sequential writes (as bad as a bad 5,400 drive), but it'd still make a better OS drive (provided you could live with 40GB!). Reply

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