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WD Blue SN570 vs SN550: Which one to choose and why?

    Both WD Blue SN570 and WD Blue SN550 are budget NVMe SSDs. If you ever try to find a good NVMe SSD from WD, you will get to see these recommendations for sure. So, it is very easy to get confused.

    But, here in this article, I will highlight the differences and help you make your final decision without any worries. For your information, both of them are DRAM-Less SSDs.

    If you look at the theoretical speeds, the Blue SN570 can reach up to the read/write speed of 3500 and 3000 MB/s.

    Whereas the Blue SN550 can offer you the read/write speed of up to 2600 and 1800 MB/s.

    We are here talking about the top storage variants i.e. 1TB of SN570 and 2TB of SN550. This comparison is going to specifically focus on the 1TB variants. However, you can easily consider this information for other variants as well. So, without any further delays, let’s get started.

    Featured image
    SpecificationsWD Blue SN570WD Blue SN550
    Available Variants250GB – 1TB250GB – 2TB
    Interface/Form Factorx4 PCIe 3.0/NVMe/M.2 2280x4 PCIe 3.0/NVMe/M.2 2280
    Seq. Read SpeedUp to 3500 MB/sUp to 2400 MB/s
    Seq. Write SpeedUp to 3000 MB/sUp to 1950 MB/s
    Random Read 4K, QD32 (IOPS)
    250GB: Up to 190K
    Up to 360K
    Up to 460K

    250GB: Up to 165K
    Up to 250K
    Up to 345K
    Up to 360K
    Random Write 4K, QD32 (IOPS)
    250GB: Up to 210K
    500GB: Up to 390K
    1TB: Up to 450K

    250GB: Up to 160K
    Up to 175K
    Up to 385K
    Up to 384K
    Power Consumption5.3 W Maximum3.5 W Maximum
    Warranty Period5 Years5 Years
    Other SpecificationsProduct DatasheetProduct Datasheet

    Check AmazonCheck Amazon

    You can see that the SN570 is better in terms of speed and performance. However, if you are looking for a higher storage variant i.e. 2TB, only SN550 can offer you the same.

    Read Brief SSD Buying Guide 2022

    The test bench is equipped with an Intel Core i5 12600K CPU along with a 16GB DDR4 4800MHz RAM kit. The motherboard is MSI Pro Z690-A DDR5. Both the SSDs are 100% empty during the tests and 1TB variants are utilized to run the benchmark tests. Other variants may have different performance results.

    For these tests, I have used the CrystalDiskMark software.

    I tried using both SSDs on my Intel i5 8th Gen computer. It has 8GB DDR4 RAM. Then I tried firing up some software and games multiple times. Then I took an average of these results and created this comparison table to help you more with the selection.

    OS/SoftwareWD Blue SN570WD Blue SN550
    Google ChromeWithin 4 SecondsWithin 3 Seconds
    Adobe Photoshop11 Seconds Seconds14 Seconds Seconds
    Fortnite38 Seconds44 Seconds
    Blender Software22 Seconds25 Seconds
    Tomb Raider21 Seconds27 Seconds

    Again, the WD Blue SN570 is able to open these software at a very fast pace. The SN550 is also not very behind but there is surely some difference.

    Version (Capacity)WD Blue SN570 (TBW)WD Blue SN550 (TBW)
    2TBVersion not available900
    ParameterWD Blue SN570 WD Blue SN550
    MTBF (Mean Time Between Failure)1.5 Million Hours1.7 Million Hours
    Warranty Period5 Years 5 Years

    You can see that everything including the warranty period and TBW (Total TB Written) limits are exactly the same except the MTBF. The SN550 is surprisingly giving us a higher MTBG rating which means it will be comparatively long-lasting.

    SpecificationWD Blue SN570 SSDWD Blue SN550 SSD
    NAND TypeSandisk’s TLC 3D NANDSandisk’s TLC 3D NAND
    NAND Layers112 Layers96 Layers
    ControllerWD ProprietaryWD Proprietary
    Controller ConfigurationsTri-core, Quad-Channels
    CacheSLC CacheSLC Cache

    The controller configurations of WD Blue SN550 are not disclosed by the company. However, all other technical specifications are either similar or the SN570 has better ones.

    Impressively, the price difference between these SSDs isn’t that much if you look at the specifications. Whether you buy them online or offline, the SN550 is going to be the cheaper one. But, again, the extra amount you are paying for the SN570 is completely worth it.

    The best SSD in terms of performance is surely the WD Blue SN570. However, the SN550 is also offering great read/write speed. But, if you look at the difference in performance and the price, the SN570 will surely be a good pick for you. The SN550 is a good option for normal users, students, office workers, and even for some high-end tasks such as light gaming.

    On the other hand, the SN570 is good for gamers, video editors, and other professionals who need very high data read/write speeds.

    Keep a thing in mind that both of these are DRAM-Less SSDs. So, there could be some speed limitations when it comes to the random read/write operations. You can have a look at some of the popular DRAM NVMe SSD below.

    Also Read: Best SSDs to upgrade your laptop in 2022

    The main drawback of both these SSDs is the lack of DRAM. So, let’s have a look at some DRAM NVMe SSDs which will fulfill this requirement as well at almost a similar price.

    ImageModelFeatures and SpecsPrice
    Samsung 970 Evo
    Plus (NVMe)
    Capacity: 250GB – 2TB
    Interface: PCIe 3.0
    Speed: 3500/2500 MB/s
    Endurance: 1200 TBW
    Check Price!
    A2000 (NVMe)
    Capacity: 250GB – 1TB
    Interface: PCIe 3.0
    Speed: 2200/2000 MB/s
    Endurance: 600 TBW
    Check Price
    Crucial P5 (NVMe) Capacity: 250GB – 2TB
    Interface: PCIe 3.0
    Speed: 3400/3000 MB/s
    Endurance: 1200 TBW
    Check Price

    Thanks for reading!

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