Both WD Blue SN550 and WD Black SN750 are SSD. Some users want to know the differences between them and want to know which one to choose. This post from MiniTool tells you details about SN550 vs SN750.

Western Digital is a hard drive manufacturer and data storage device company. It designs, manufactures, and sells data technology products, including storage devices, data center systems, and cloud storage services. Western Digital offers both mechanical and solid-state drive storage devices. In addition, it has the Blue, Black, Red, Green, Purple, and Gold brands for mechanical drives.

In this post, we will focus on two different WD hard drives – WD Blue SN550 and WD Black SN750. Now, let’s see SN550 vs SN750.

Overview of SN550 vs SN750


The WD Blue SN550 is the company’s newest mainstream NVMe SSD and successor to the SN500. The new WD drive is a consumer, entry-level drive all packed inside the small M.2 2280 form factor. This includes an in-house controller, firmware, and their latest 3D NAND.

As such, this makes it ideal for PC users looking to improve overall system performance over traditional SATA SSDs and especially HDDs, for jobs including booting and application load speeds. It’s also perfect for those looking to move to an NVMe-based SSD at a very affordable cost.


Western Digital has announced the launch of the second generation of WD Black Series enthusiast SSDs, the WD SN750 NVMe. The SN750 is an M.2 2280 SSD with an optional heatsink for longer peak performance, but it will take up more space.

Utilizing 64-layer 3D NAND, WD is able to scale up to 2TB, helping to store modern games over 100GB. The speeds quoted above will result in faster install times, which is beneficial when loading the games they play to the SSD and leaving those less used games on the HDD.

SN550 vs SN750

In this part, we will show you information about SN550 vs SN750. To learn more detailed information, keep on your reading.

SN550 vs SN750: Interface

First, let’s SN550 vs SN750 in interface and form factor. The two storage drives are also backward compatible with older interfaces. You can find the compatibility lists below:


  • PCIe Gen3 x2
  • PCIe Gen2 x4
  • PCIe Gen2 x2
  • PCIe Gen2 x1


  • PCIe Gen3 x2
  • PCIe Gen3 x1
  • PCIe Gen2 x4
  • PCIe Gen2 x2
  • PCIe Gen2 x1

SN550 vs SN750: Read/Write Speed

Speaking of SN550 vs SN750, read/write speed should be mentioned.

The sequential read speed of 1 TB SN550 is up to 1950MB/s and the sequential write speed is up to 410K MB/s. The sequential read speed of 1 TB SN750 is 405K MB/s, and the sequential write speed is 515K MB/s.

In short, in the aspect of read/write speed, SN750 is a little bit better than SN550. Reading and writing speed is also affected by other factors, so SN750 may be slower than SN550 in actual use.

SN550 vs SN750: Capacity

The capacity is a key factor when selecting an SSD. So, the next difference between WD SN550 and SN750 is the SSD capacity. The SN550 offers 4 capacities – 250GB, 500GB, 1TB, 2TB; SN750 provides 5 capacities – 250 GB, 500GB, 1TB, 2TB, 4TB.

To sum up, SN750 offers more capacity options than SN550.

SN550 vs SN750: Endurance

When you compare the same capacity, the 500GB SN550 and 500GB SN750 have the same durability. In terms of TBW, the 1TB SN550 and 1TB SN750 are also identical. Having said that, you can write 33.33% more data with the 250GB SN750 than the 250GB SN550, and with the 2TB SN750, you can also write 33.33% more data than the 2TB SN550.

SN550 vs SN750: MTTF

Reliability for Western Digital SSDs is measured with Mean Time to Failure (MTTF), which is the estimated life span of the solid-state drive before it ends up failing. The SN750 has an MTTF that is 50,000 hours longer than the SN550. You can find the MTTF stats below:

  • WD_Blue SN550: 1,700,000 hours
  • WD_Black SN750: 1,750,000 hours

SN550 vs SN750: Warranty

As for SN550 vs SN750, we will show you the sixth aspect – warranty. SN550 and SN750 provide good reliability and warranty. All of them provide 1.5 million hours of reliability. All of them are provided a 5-year limited warranty.

SN550 vs SN750: Price

When choosing an SSD, the budget would also be taken into consideration. Here, we will show you the last difference between SN550 and SN750. It is the price. According to the official site, the 1TB SN550 is about $103.96, but the price of the 1TB SN750 is about $124.90.

Tip: As the market and time change, so does the price.

As for Samsung SN550 vs SN750, 1TB SN750 is more expensive than 1TB SN550. If you want to know the more different prices of different storage sizes, you can visit its official site.

SN 550 vs SN 750: Which One to Choose

After knowing the differences between SN 550 and SN 750, you may wonder which one to choose. Here is a brief conclusion.

  • WD Blue SN550 drives have specific uses for personal, gaming, and business products, whereas WD Black SN750 drives have specific uses for only gaming.
  • A very fast read speed of 3430 Megabytes per second is achieved by the WD Black SN750, whereas the WD Blue SN550’s read speed is just 2400 Megabytes per second.
  • WD Blue SN550 TBW GOES UP TO 900, whereas WD Black SN750 TBW ONLY GOES UP TO 600.
    SATA Connectivity Technology is used by both the WD Blue SN550 and the WD Black SN750 hard drives.
  • The weight of the WD Blue SN550 is only 5.6 grammes, and the weight of the WD Black SN750 is only 7.6 grammes.
  • WD Blue SN550 is less expensive as compared to WD Black SN750, which is a little more expensive.
  • The WD Blue SN550 is available in four different capacities: 250GB, 500GB, 1TB, and 2TB, while the WD Black SN750 is available in five capacities: 250GB, 500GB, 1TB, 2TB, and 4TB.

How to Upgrade Hard Drive to SN550 or SN750 Without Data Loss?

Considering the advantages of SSD, you may plan to use SN550 or SN750 on your computer for gaming or working. But if you replace the hard drive directly, you may need to reinstall the operating system and come across data loss.

Therefore, how to upgrade the hard drive to SN550 or SN750 without reinstalling OS and losing data? To do that, you can choose to migrate the OS and all data on the hard drive to the new SSD. In this situation, you can try MiniTool ShadowMaker, which can help you to clone OS from HDD to SSD without data loss.

Now, we will show you how to upgrade your hard drive to WD Black SN750 or WD Blue SN550 with MiniTool ShadowMaker.

1. Connect the SSD to your computer.

2. Download MiniTool ShadowMaker from the following button, install and launch it. Please note that do not install MiniTool ShadowMaker on the new SSD.

MiniTool ShadowMaker TrialClick to Download100%Clean & Safe

3. Click Keep Trial.

4. Then you will enter the main interface of MiniTool ShadowMaker and go to the Tools page. 

5. Then click Clone Disk.

click Clone Disk

6. After that, click the Source module to select the disk clone source. Here, you need to select the original hard drive. Then click Finish.

select the disk clone source

7. Then click the Destinationmodule to choose the target disk. Here you need to choose the new SSD. Then click Finish.

choose the target disk

8. Then you will receive a warning message which tells you that all data on the target disk will be destroyed. If there are important files on it, please back up them first.

9. Then the disk cloningprocess will start. Please do not interrupt the disk cloning process until it is finished.

the disk cloning process will start

When the disk cloning process is finished, you will receive a warning message, telling you that the source disk and the target disk have the same signature. Then, you need to remove or disconnect the original hard drive from your computer. In addition, if you want to boot the computer from the target disk, you need to change the BIOS order first.

the warning message

After all steps are finished, you have successfully migrated OS and data from the original hard drive to the new SSD.

If your Toshiba fails to start up, MiniTool ShadowMaker can also help you to back up data. You are required to create a bootable USB drive, CD/DVD or USB hard drive to boot the PC with MiniTool Media Builder and then make a backup with the Bootable Edition of MiniTool ShadowMaker.

Bottom Line

As for SN550 vs SN750, this post has shown their differences in several aspects. If you do not know which one is better, you can refer to the above part. If you have any different ideas for WD Black SN750 vs WD Blue SN550, you can leave a message in the comment zone.

In addition, if you have any problems with MiniTool ShadowMaker, please feel free to contact us via email [email protected] and we will reply to you as soon as possible.

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