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WD_Blue SN550 vs. WD_Black SN750

The WD_Blue SN550 and WD_Black SN750 are both M.2 2280 NVMe Solid State Drives from Western Digital. So, what are the main differences between these two products? You can find out in this comparison guide.

Quick Summary

When compared to the WD_Blue SN550, the WD_Black SN750 is quite a bit faster at maximum sequential reading, maximum sequential writing, maximum random reading and maximum random writing.

The SN750 also has slightly better reliability overall in addition to better endurance at the 250GB and 2TB capacities.

Thus, the WD_Black SN750 is the better product all around than the WD_Blue SN550.

If you are interested, you can purchase either of the two aforementioned SSDs on Amazon with the following links:

You can also see how the SN750 stacks up against the SN850 with this guide.

WD_Blue SN550 vs. WD_Black SN750Comparison Chart

You can check out the comparison table for the two Western Digital SSDs below.

 WD_Blue SN550 M.2 2280 NVMe Solid State DriveWD_Black SN750 M.2 2280 NVMe Solid State Drive
Capacity Options and Model Numbers250GB WD BLUE SN550: WDS250G2B0C

500GB WD BLUE SN550: WDS500G2B0C

1TB WD BLUE SN550: WDS100T2B0C

2TB WD BLUE SN550: WDS200T2B0C
250GB WD BLACK SN750: WDS250G3X0C

500GB WD BLACK SN750: WDS500G3X0C

1TB WD BLACK SN750: WDS100T3X0C

2TB WD BLACK SN750: WDS200T3X0C

4TB WD BLACK SN750: WDS400T3X0C
Form FactorM.2 2280M.2 2280
Dimensions80 mm (± 0.15 mm) x 22.00 mm (± 0.15mm) x 2.38 mm80 mm (± 0.15 mm) x 22.00 mm (± 0.15mm) x 2.38 mm
Weight6.5g (± 1g)7.5g (± 1g)
InterfacePCIe Gen3 x4PCIe Gen3 x4
Backwards Compatible InterfacesPCIe 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
NAND3D NAND3D NAND
Maximum Sequential Read Speed250GB WD BLUE SN550: Up to 2400 MB per second

500GB WD BLUE SN550: Up to 2400 MB per second

1TB WD BLUE SN550: Up to 2400 MB per second

2TB WD BLUE SN550: Up to 2600 MB per second
250GB WD BLACK SN750: Up to 3100 MB per second

500GB WD BLACK SN750: Up to 3430 MB per second

1TB WD BLACK SN750: Up to 3430 MB per second

2TB WD BLACK SN750: Up to 3400 MB per second

4TB WD BLACK SN750: Up to 3400 MB per second
Maximum Sequential Write Speed250GB WD BLUE SN550: Up to 950 MB per second

500GB WD BLUE SN550: Up to 1750 MB per second

1TB WD BLUE SN550: Up to 1950 MB per second

2TB WD BLUE SN550: Up to 1800 MB per second
250GB WD BLACK SN750: Up to 1600 MB per second

500GB WD BLACK SN750: Up to 2600 MB per second

1TB WD BLACK SN750: Up to 3000 MB per second

2TB WD BLACK SN750: Up to 2900 MB per second

4TB WD BLACK SN750: Up to 3100 MB per second
Maximum Random Read Speed250GB WD BLUE SN550: Up to 170K IOPS

500GB WD BLUE SN550: Up to 300K IOPS

1TB WD BLUE SN550: Up to 410K IOPS

2TB WD BLUE SN550: Up to 360K IOPS
250GB WD BLACK SN750: Up to 220K IOPS

500GB WD BLACK SN750: Up to 420K IOPS

1TB WD BLACK SN750: Up to 515K IOPS

2TB WD BLACK SN750: Up to 480K IOPS

4TB WD BLACK SN750: Up to 550K IOPS
Maximum Random Write Speed250GB WD BLUE SN550: Up to 135K IOPS

500GB WD BLUE SN550: Up to 240K IOPS

1TB WD BLUE SN550: Up to 405K IOPS

2TB WD BLUE SN550: Up to 384K IOPS
250GB WD BLACK SN750: Up to 180K IOPS

500GB WD BLACK SN750: Up to 380K IOPS

1TB WD BLACK SN750: Up to 560K IOPS

2TB WD BLACK SN750: Up to 550K IOPS

4TB WD BLACK SN750: Up to 520K IOPS
WD BLACK SSD Dashboard SupportYesYes
Optional Heatsink?NoYes
Operating Temperature32°F to 158°F (or 0°C to 70°C)32°F to 158°F (or 0°C to 70°C)
Storage Temperature-67°F to 185°F (or -55°C to 85°C)-67°F to 185°F (or -55°C to 85°C)
MTTF1,700,000 hours1,500,000 hours
Endurance250GB WD BLUE SN550: 150 TBW

500GB WD BLUE SN550: 300 TBW

1TB WD BLUE SN550: 600 TBW

2TB WD BLUE SN550: 900 TBW
250GB WD BLACK SN750: 200 TBW

500GB WD BLACK SN750: 300 TBW

1TB WD BLACK SN750: 600 TBW

2TB WD BLACK SN750: 1200 TBW

4TB WD BLACK SN750: 2400 TBW
CertificationsBSMI

CAN ICES-3(B)/NMB-3(B)

CE

FCC

KCC

Morocco

RCM

TUV

UL

VCCI
BSMI

CE

FCC

KCC

Morocco

RCM

TUV

UL

VCCI
Warranty5 years or TBW5 years or TBW
PricingCheck price on Amazon.Check price on Amazon.

Capacity Options

The WD_Blue SN550 is available in four capacity options (250 GB, 500 GB, 1 TB and 2 TB) while the WD_Black SN750 comes in five capacities (250 GB, 500 GB, 1 TB, 2 TB and 4 TB). You can find the model number for each version below:

  • 250GB WD BLUE SN550: WDS250G2B0C
  • 500GB WD BLUE SN550: WDS500G2B0C
  • 1TB WD BLUE SN550: WDS100T2B0C
  • 2TB WD BLUE SN550: WDS200T2B0C
  • 250GB WD BLACK SN750: WDS250G3X0C
  • 500GB WD BLACK SN750: WDS500G3X0C
  • 1TB WD BLACK SN750: WDS100T3X0C
  • 2TB WD BLACK SN750: WDS200T3X0C
  • 4TB WD BLACK SN750: WDS400T3X0C

Form Factor

The SN550 and SN750 solid state drives use the M.2 2280 form factor.

Dimensions

The dimensions for the two SSDs in this versus guide are pretty much identical. You can take a look at the measurements, which is displayed as Length x Width x Height, below:

  • 80 mm (± 0.15 mm) x 22.00 mm (± 0.15mm) x 2.38 mm

Weight

The SN750 is heavier when compared to the SN550. You can check out the weight specifications below:

  • WD BLUE SN550: 6.5g (± 1g)
  • WD BLACK SN750: 7.5g (± 1g)

Interface

The two Western Digital SSDs utilize PCIe Gen3 x4 as the interface.

Backwards Compatible Interfaces

The two storage drives are also backwards compatible with older interfaces. You can find the compatibility lists below:

WD_BLUE SN550:

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

WD_BLACK SN750:

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

NAND

For the memory components, the SN550 and SN750 are equipped with 3D NAND.

Maximum Sequential Read Speed

In general, the WD_BLACK SN750 is faster than the WD_BLUE SN550 at maximum sequential reading.

When you compared the same capacities, the 250GB SN750 is 700 MB per second faster (or 29.17% faster) than the 250GB SN550 while the 500GB and 1TB SN750 SSDs are 1030 MB per second faster (or 42.92% faster) than the 500GB and 1TB SN550 SSDs. The 2TB SN750 is 800 MB per second faster (or 30.77% faster) than the 2TB SN550.

You can take a look at the max sequential read speeds below:

  • 250GB WD BLUE SN550: Up to 2400 MB per second
  • 500GB WD BLUE SN550: Up to 2400 MB per second
  • 1TB WD BLUE SN550: Up to 2400 MB per second
  • 2TB WD BLUE SN550: Up to 2600 MB per second
  • 250GB WD BLACK SN750: Up to 3100 MB per second
  • 500GB WD BLACK SN750: Up to 3430 MB per second
  • 1TB WD BLACK SN750: Up to 3430 MB per second
  • 2TB WD BLACK SN750: Up to 3400 MB per second
  • 4TB WD BLACK SN750: Up to 3400 MB per second

Maximum Sequential Write Speed

The WD_BLACK SN750 is also faster all around than the WD_BLUE SN550 at maximum sequential writing.

The 250GB SN750 is 650 MB per second faster (or 68.42% faster) than the 250GB SN550, the 500GB SN750 is 850 MB per second faster (or 48.57% faster) than the 500GB SN550, the 1TB SN750 is 1050 MB per second faster (or 53.85% faster) than the 1TB SN550 and the 2TB SN750 is 1100 MB per second faster (or 61.11% faster) than the 2TB SN550.

You can find the max sequential write speed specifications below:

  • 250GB WD BLUE SN550: Up to 950 MB per second
  • 500GB WD BLUE SN550: Up to 1750 MB per second
  • 1TB WD BLUE SN550: Up to 1950 MB per second
  • 2TB WD BLUE SN550: Up to 1800 MB per second
  • 250GB WD BLACK SN750: Up to 1600 MB per second
  • 500GB WD BLACK SN750: Up to 2600 MB per second
  • 1TB WD BLACK SN750: Up to 3000 MB per second
  • 2TB WD BLACK SN750: Up to 2900 MB per second
  • 4TB WD BLACK SN750: Up to 3100 MB per second

Maximum Random Read Speed

The story is the same when it comes to maximum random reading with the SN750 beating out the SN550.

The 250GB SN750 is 50K IOPS faster (or 29.41% faster) than the 250GB SN550, the 500GB SN750 is 120K IOPS faster (or 40% faster) than the 500GB SN550, the 1TB SN750 is 105K IOPS faster (or 25.61% faster) than the 1TB SN550 and the 2TB SN750 is 120K IOPS faster (or 33.33% faster) than the 2TB SN550.

You can take a look at the max random read speed specs below:

  • 250GB WD BLUE SN550: Up to 170K IOPS
  • 500GB WD BLUE SN550: Up to 300K IOPS
  • 1TB WD BLUE SN550: Up to 410K IOPS
  • 2TB WD BLUE SN550: Up to 360K IOPS
  • 250GB WD BLACK SN750: Up to 220K IOPS
  • 500GB WD BLACK SN750: Up to 420K IOPS
  • 1TB WD BLACK SN750: Up to 515K IOPS
  • 2TB WD BLACK SN750: Up to 480K IOPS
  • 4TB WD BLACK SN750: Up to 550K IOPS

Maximum Random Write Speed

The SN750 also has a higher maximum random writing speeds in general when compared to the SN550.

The 250GB SN750 is 45K IOPS faster (or 33.33% faster) than the 250GB SN550, the 500GB SN750 is 140K IOPS faster (or 58.33% faster) than the 500GB SN550, the 1TB SN750 is 155K IOPS faster (or 38.27% faster) than the 1TB SN550 and the 2TB SN750 is 166K IOPS faster (or 43.23% faster) than the 2TB SN550.

You can check out the random write speeds below:

  • 250GB WD BLUE SN550: Up to 135K IOPS
  • 500GB WD BLUE SN550: Up to 240K IOPS
  • 1TB WD BLUE SN550: Up to 405K IOPS
  • 2TB WD BLUE SN550: Up to 384K IOPS
  • 250GB WD BLACK SN750: Up to 180K IOPS
  • 500GB WD BLACK SN750: Up to 380K IOPS
  • 1TB WD BLACK SN750: Up to 560K IOPS
  • 2TB WD BLACK SN750: Up to 550K IOPS
  • 4TB WD BLACK SN750: Up to 520K IOPS

WD BLACK SSD Dashboard

The two solid state drives are compatible with the WD BLACK SSD Dashboard, a software you can use to optimize performance, disable low power mode and more.

Optional Heatsink

The WD_Black SN750 is the only one of the two SSDs in this comparison to feature an optional heatsink.

To find out what motherboard is compatible with the heatsink version of the SN750, you can check out this guide.

Operating Temperature

The SN550 and SN750 have the same operating temperature range, which is from 32°F to 158°F (or 0°C to 70°C).

Storage Temperature

The two Western Digital storage drives also have the same storage temperature range, which is from -67°F to 185°F (or -55°C to 85°C).

MTTF

Reliability for Western Digital SSDs are 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 a 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

Endurance

Endurance of Western Digital solid state drives are measured with Terabytes Written, which is the amount of data you can write on the SSD during its warranty coverage period.

When you compared the same capacities, the 500GB SN550 and 500GB SN750 have the same endurance. The 1TB SN550 and 1TB SN750 are also identical when it comes to TBW.

With that said, you can write 33.33% more data with the 250GB SN750 than the 250GB SN550 as well as 33.33% more data with the 2TB SN750 than the 2TB SN550.

You can take a look at the endurance specs below:

  • 250GB WD BLUE SN550: 150 TBW
  • 500GB WD BLUE SN550: 300 TBW
  • 1TB WD BLUE SN550: 600 TBW
  • 2TB WD BLUE SN550: 900 TBW
  • 250GB WD BLACK SN750: 200 TBW
  • 500GB WD BLACK SN750: 300 TBW
  • 1TB WD BLACK SN750: 600 TBW
  • 2TB WD BLACK SN750: 1200 TBW
  • 4TB WD BLACK SN750: 2400 TBW

Certifications

You can find the certifications for each of the devices below:

WD_Blue SN550:

  • BSMI
  • CAN ICES-3(B)/NMB-3(B)
  • CE
  • FCC
  • KCC
  • Morocco
  • RCM
  • TUV
  • UL
  • VCCI

WD_Black SN750:

  • BSMI
  • CE
  • FCC
  • KCC
  • Morocco
  • RCM
  • TUV
  • UL
  • VCCI

Warranty

The WD_Blue SN550 M.2 2280 NVMe Solid State Drive and WD_Black SN750 M.2 2280 NVMe Solid State Drive each comes with a 5-year warranty that could expire sooner if you reached the aforementioned TBW limit.

Resources: