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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.

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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
500GB: 
Up to 360K
1TB: 
Up to 460K

250GB: Up to 165K
500GB: 
Up to 250K
1TB: 
Up to 345K
2TB: 
Up to 360K
Random Write 4K, QD32 (IOPS)
250GB: Up to 210K
500GB: Up to 390K
1TB: Up to 450K

250GB: Up to 160K
500GB: 
Up to 175K
1TB: 
Up to 385K
2TB: 
Up to 384K
Power Consumption5.3 W Maximum3.5 W Maximum
Warranty Period5 Years5 Years
Other SpecificationsProduct DatasheetProduct Datasheet
Image

Price
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

Parameter (Avg.)WD Blue SN570 1TBWD Blue SN550 1TB
Sequential Read1,901 MB/s1,624 MB/s
Sequential Write1,960 MB/s1,214 MB.s
Random 4KB Read55 MB/s54.3 MB/s
Random 4KB Write153 MB/s142.2 MB/s
Deep Queue 4K Read1216 MB/s1,021.2 MB/s
Deep Queue 4K Write877 MB/s987.6 MB/s
Source (WD Blue SN570)

You can clearly see that the SN570 1TB is again beating the SN550 in all the synthetic benchmark tests. However, we are going to compare the practical performance differences in the next part.

I tried using both the 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)
250GB150150
500GB300300
1TB600600
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
DRAMNoNo

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 both the 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 with 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!
Kingston
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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