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WD Black SN750 vs WD Black SN770: Which NVMe SSD to buy?

WD Black SN750 and WD Black SN770 both come in the budget NVMe category. The SN750 is a Gen 3 NVMe whereas the SN550 is a Gen 4 NVMe. So, if you are confused between the both, you should first check your requirements. If you have a laptop, a Gen 3 SSD will be enough. So, SN750 is a good pick. However, if you are looking for higher read/write speed, SN770 is the best pick for sure.

The maximum read/write speed of SN770 is 5150/4850 MB/s whereas SN750 has 3400/3100 MB/s read/write speed. So, you can easily make your final decision right here. If you are good to go with around a 3GB/s speed limit and want to save some money, SN750 is the best option for both.

There are numerous other things to discuss and compare in this article. So, without any delays, let’s get started.

SpecificationWD Black SN770WD Black SN750
Storage Variants250GB, 500GB, 1TB, 2TB250GB, 500GB, 1TB, 2TB, 4TB
Theoretical Read Speed (Max.)5,150 MB/s3,400 MB/s
Theoretical Write Speed (Max.)4,850 MB/s3,100 MB/s
Random Read (4K, QD32) (Max.)Up to 7,40,000 IOPSUp to 5,50,000 IOPS
Random Write (4K, QD32) (Max.)Up to 8,00,000 IOPSUp to 5,20,000 IOPS
Form Factor/InterfaceM.2 (2280)/x4 PCIe 4.0/NVMeM.2/x4 PCIe 3.0/NVMe
MTBF (Reliability)1.75 Million Hours1.75 Million Hours
Warranty5 Years5 Years
EncryptionNo hardware encryptionNo hardware encryption
Heatsink OptionNot AvailableAvailable
AvailabilityCheck PriceCheck Price

SN770 definitely higher read/write speed. However, all other things are pretty similar in both.  One of the major disadvantages of both is that neither supports encryption.

The test bench used for these benchmarks has Intel i5 12700K CPU along with 4200MHz DDR5 RAM. The SSDs are 0% filled and set as OS drives. The motherboard is MSI Pro Z690-A.

Results Analysis: Clearly, WD Black SN770 is the winner. It is an obvious result to expect from this comparison. The differences are huge and pretty significant. So, if you are looking for the best performance, SN770 is the best pick for you.

ParameterWD Black SN770WD Black SN750 
TBW250GB: 200
: 300 TBW
1TB: 600 TBW
2TB: 1,200 TBW
250GB: 200 TBW
500GB: 300  TBW
1TB: 600 TBW
2TB: 1,200 TBW
4TB: 2,400 TBW
Warranty5-Years Limited Warranty5-Years Limited Warranty
MTBF (Mean Time Between Failure)1.75 Million Hours1.75 Million Hours

There is no difference whatsoever in the endurance rating including TBW and MTBF between the both. So, there is no point to talk here.

Technical SpecificationWD Black SN770WD Black SN750
NAND Flash TypeSanDisk’s TLC NAND Sandisk’s TLC
NAND Flash Layers11264
ControllerWD ProprietaryWD Proprietary
Controller Configurations4 ChannelTri-core, 8-ch, 8-CE/ch
DRAMNot AvailableAvailable
Heatsink OptionNot AvailableAvailable
EncryptionNot AvailableNot Available
WebsiteWD Black SN770WD Black SN750

When it comes to the technical configurations, the SN770 is equipped with better components. First of all, the number of NAND Flash Layers is higher in the SN770 which is a good thing in terms of performance. The controller is also better with the SN770. However, one noticeable drawback with both of these is the non-availability of encryption.

Overall, the SN770 is much more technically-capable as compared to the SN750.

WD Black SN770 is the perfect pick for those who have a little higher budget. It has better sequential and random read/write performance. Benchmark results are also in favor of SN770. Keep a thing in mind that SN770 is a Gen 4 NVMe which is suitable for high-end computers.

However, the SN750 is for those who have a low budget and looking for a perfect Gen 3 NVMe. It can offer you acceptable performance by spending not too much.

Let me know what you think about this article in the comments.

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