Adata Premier SP550 SSD Review (240GB)

Early last month we reviewed Adata’s newest SATA 6Gb/s contender in the enthusiast market segment, the XPG SX930. Utilizing a JMicron controller and premium MLC NAND, it delivered good performance at a decent price point.  Today we are going to shift gears and take a look at their latest entry level SATA 6Gb/s SSD, the Premier SP550. The Premier SP550 is the first retail product we have come across with the Silicon Motion SM2256 controller since our initial preview back in February. Furthermore, it boasts SK Hynix TLC NAND, which is also a first for us. We are hoping to see an improvement in the SM2256’s performance now that the firmware has been finalized, so today’s results may be quite interesting to see. Can the Premier SP550, utilizing this new controller and TLC combo, deliver? Let’s find out.

Adata Premier SP550 240GB Main


The Premier SP550 is a SATA 6Gb/s 2.5″ 7mm form factor SSD. It is currently available in capacities of 120GB ($60), 240GB ($80), and 480GB ($170). A 960GB model will be coming however. Its performance is rated for up to 560MB/s read and 510MB/s write for both the 240GB and 480GB models, however, the 120GB model is only rated for up to 410MB/s write. In terms of IOPS the 240GB and 480GB models are rated for up to 75K IOPS read and write while the 120GB is rated for up to 60K read/70K write.

It features LDPC ECC Technology as well as a RAID Engine & Data Shaping to help extend the flash endurance. The 120GB and 240GB models are rated for up to 90TBW while the 480GB is rated for up to 180TBW and the 960GB model doubles that for a rating up to 360TBW. It has SLC caching to help with performance and supports DevSleep. Besides that, it comes with a 2.5mm disk bay spacer you can use if needed.

Overall warranty length is 3 years, which is standard of their drives.

ADATA SP550 toolbox

Also, just as for their other SSDs, you can download Adata’s SSD toolbox to quickly and conveniently configure, optimize, and monitor your drive. Also, you can download Acronis True image HD off their website as well to aid in migrating your OS to your new SSD.


As this is an entry level product, the packaging is pretty bland compared to its higher-end brother, however, there is still a see through window that allows you to see the drive on the front.

Adata Premier SP550 240GB Packaging Adata Premier SP550 240GB AccessoriesWe can see that once opened that it comes with the drive, the spacer, and a quick start guide. Adata Premier SP550 240GB Front and BackThe shell has a nice matte black finish accented by their logo on a silver reflective sticker.

Adata Premier SP550 240GB Disassembled Adata Premier SP550 240GB PCBOnce disassembled we can see that they did not included a thermal pad to help distribute heat into the shell off the controller. During our testing runs the controller reached up to 63C, which isn’t too bad considering the drive is fully stressed.

Overall, there are 8 NAND packages on our 240GB model with room for another 8. The NAND is supplied by SK Hynix. Each package is 32GiB in capacity for a total RAW NAND capacity of 256GiB. Since the usable capacity is 240GB, we can see that it is over provisioned by ~7%. The total usable capacity once formatted in our system is 223GiB.

Adata Premier SP550 240GB NANDAdata Premier SP550 240GB Controller

There is also a single DRAM chip and controller. The DRAM chip is a Samsung made 256 DDR3 chip. The controller is the new SM2256 controller as we mentioned before. Specifics on this controller can be read in our controller preview analysis here.


  1. blank

    80MB/s write on TLC area ?

    Thats really really bad. That means 120GB model would only achieve 40MB/s at best.

    Looks like hynix TLC isn’t really on par with micron or toshiba flash.

    • blank

      That fourth ‘Performance’ star is more than a little bit generous.

      • blank

        To be fair, look how well it does in PCMark 8. Sure, large transfers aren’t great past the cache buffer and are slower than the Samsung EVO, but in PCMark it is on par with it. In most consumer workloads you have short bursts of writes. For the given use and market segment, the performance, while slower than the competition in large write transfers, is still decent.

      • blank

        I wounder how endurance fairs, given this clearly isn’t the best TLC out there.

      • blank

        Well, we are guaranteed what the specs state. The 120GB and 240GB models are rated for up to 90TBW, the 480GB is
        rated for up to 180TBW and the 960GB model is rated up
        to 360TBW. If it wears before then within 3 years one can RMA.

      • blank

        Hello, I have been using this drive about 1 month, I found out that Reallocation event count RAW value is 7 from the first day and drive temperature is around 36C- 42C. Is that normal?

      • blank

        What are the top 5 consumer ssds for large file transfers in your opinion?

      • blank

        Why type of drive are you looking for? PCIe, SATA, M.2, etc?

      • blank

        SATA. I have an old motherboard. M3a78pro

      • blank

        Your only going to get around 200 MB on that MB-
        Restricted by it’s 3Gb Sata ports.
        Modern MB have 6Gb ports that max out around 500 MB.
        But in answer to your question
        Samsung 850 pro.
        Sandisk extreme pro.

      • blank

        Tanks for the suggestions. I have a Asus g74sx laptop also. I know the Samsung pro and sandisk pro are good but I am looking for the 5 best ssds at large transfers not just the top two. So I can get the best deal on price.

      • blank

        Well, there are still many mainstream drives that can do that, you don’t need to buy the best of the best. The BX 100 and Samsung 850 EVO can sustain write speeds and are usually popular choices. Just stay away from the dirt cheap value segment, especially TLC if it isn’t 3D.

      • blank

        Hi Mike, Forgot to mention in earlier post-Capacity of the drive plays
        a big part in the write speed.
        Example-If you wanted only a 120/128GB size then your almost
        totally limited to Samsung pro.
        If your considering 480/512GB then most MLC drives will be fine.

        Personally I will only buy drives where the flash has been cut and
        binned by the manufacturer-So that cuts out the likes of A-Data
        and Kingston-This is only personal preferance-Remembering
        that this was what gave OCZ a 60% failure rate on some of their

      • blank

        All of those qualifiers don’t get reflected in that Performance star rating. Perhaps an additional category like ‘Price:Performance Within the Consumer Value Level Peer Group’ is needed.

      • blank

        I have been thinking about this and will consider this highly for our future reviews. Thanks for the suggestion!

      • blank

        Smaller drives may not need fast transfer speeds ( OS ) 120gb 240gb ,but the larger drives are used for ( backup, storage, large transfers ) 480gb 960gb. these larger drives need more write speed after the buffer.

  2. blank

    Good thing you guys test these ssds for us consumers. thanks for the reviews! Some or maybe more than it should be of these new ssds are slow. 80 mbs transfer speed for a 30gb file I think that’s terrible, when these ssds are advertised for 560 read / 510 write max. hdds are faster than that. If not for the slc caching and the dram buffer how slow would this new nand really be. These new controllers with their slc caching and there dram buffers paired
    with inferior nand hide their true speed and give some new ssds a bad name. I know ssds are all about access and read speeds , but come on cant we get decent transfer speeds on large files on sata? Why if we want decent transfer speeds we now have to have a pci ssd? And average users do transfer large files every now and then.

  3. blank

    Please change: “Overall, there are 8 NAND packages on our 240GB model with room for another 8. The NAND is supplied by SK Hynix. Each package is 32GB in capacity for a total RAW NAND capacity of 256GB. Since the usable capacity is 240GB, we can see that it is over provisioned by ~7%. The total usable capacity once formatted in our system is 223GB.”

    “Overall, there are 8 NAND packages on our 240GB model with room for another 8. The NAND is supplied by SK Hynix. Each package is 32GiB in capacity for a total RAW NAND capacity of 256GiB. Since the usable capacity is 240GB, we can see that it is over provisioned by ~7%. The total usable capacity once formatted in our system is 223GiB.” Just because Windows does not know what is the differenz between Gigabyte and,Gibibyte, not every reviewer needs to repeat that mistake.

  4. blank

    If you are not using your laptop for gaming our any thing that intensive like rendering these ssds will do the high end ssds are costly

    • blank

      I beg to differ, at least for the gaming part.
      This seems like a nice little SSD for entry-level SSD game loading speeds. And since games don’t write much, save for installation and updating/patching, the slow-ish writes won’t matter as there won’t be “frequent” Gigabytes of writes for games.

      Also, if you don’t mind, you could use some punctuation in your sentences. I had to read that several times to get it.

  5. blank

    And before you say it i live out in out back Queensland and a lot people out here are cattle people so there funds are restricted so they dont have the money for they high end stuff but they want something that works and will do the job ssds are more responsive faster but the high end ones can be a bit costly for what they want them for

  6. blank

    Why this (240GB sp550) does not on and is not properly detected on Lenovo T500 (p8600cpu) but runs fine on older hp nc6320 (coreduo 1,6 ddr2) and newer hp 6540b (i5, ddr3) ? Both with compatibilty and ahci setings ?

    • blank

      try cloning the drive, then swap, worked for me to get detection of unrecognized drives in many a machine in an enterprise environment. macrium reflect free – for clone

    • blank

      Just wanna put it out there.
      MiniTool Partition Wizard works great too for migration. Its free.

  7. blank

    Switched from kingston UV300 240gb drive to the adata SP550 becuase i felt the kingston had degraded overtime
    big mistake this adata caps at 40mb/s write speeds whenever you write more than 16GB of data
    and reads seem much much slower
    it was cheaper so.. bleh time to get a real fast drive

  8. blank

    So far, I’ve been using the Adata Premier SP550 SSD Review (240GB) for about 4 months (since Mar-2016), and things are good: My laptop bootup speed is up by about 3 times, to under 30 seconds! Worth the upgrade from HDD to SSD!

    Only thing was the need to use a disk imaging software to copy the laptop OS & setup from the old HDD to the new SSD.

  9. blank

    Hi guys, I just pick this SSD for a good price, but after few review I’m a bit concern about the performance of this drive, is still new, I will install it in a couple of days, should go fo a new one? o better product?, I’m using it mainly for documents such word, excel, pds, and some java development in netbeans, show I be worry or the drive is good for my work? thanks to all

Leave a Reply

Your email address will not be published. Required fields are marked *