68points

Western Digital WD Black SN850 1TB

74points

Western Digital WD Black SN850X 1TB

vs
vs

25 facts in comparison

Western Digital WD Black SN850 1TB vs Western Digital WD Black SN850X 1TB

Western Digital WD Black SN850 1TB
Western Digital WD Black SN850X 1TB

Why is Western Digital WD Black SN850 1TB better than Western Digital WD Black SN850X 1TB?

  • 200000IOPS faster random read speed
    ?

    1000000IOPSvs800000IOPS
  • 256 more bits of encryption supported
    ?

    256vs0

Why is Western Digital WD Black SN850X 1TB better than Western Digital WD Black SN850 1TB?

  • 1000MB/s faster sequential write speed
    ?

    6300MB/svs5300MB/s
  • 380000IOPS faster random write speed
    ?

    1100000IOPSvs720000IOPS
  • 914MB/s faster sequential write (UserBenchmark)
    ?

    3782MB/svs2868MB/s
  • 12.5% more controller channels
    ?

    9vs8
  • 609MB/s faster sequential read (UserBenchmark)
    ?

    3670MB/svs3061MB/s
  • 9009 higher PassMark result
    ?

    47701vs38692

Which are the most popular comparisons?

Price comparison

Western Digital WD Black SN850 1TB

WD_BLACK 1TB SN850 NVMe Internal Gaming SSD Solid State Drive - Gen4 PCIe, M.2 2280, 3D NAND, Up to 7,000...WD_BLACK 1TB SN850 NVMe Internal Gaming SSD Solid State Drive - Gen4 PCIe, M.2 2280, 3D NAND, Up to 7,000 MB/s - WDS100T1X0E
amazon logo

Western Digital WD Black SN850X 1TB

WD_BLACK 1TB SN850X NVMe Internal Gaming SSD Solid State Drive - Gen4 PCIe, M.2 2280, Up to 7,300 MB/s - ...WD_BLACK 1TB SN850X NVMe Internal Gaming SSD Solid State Drive - Gen4 PCIe, M.2 2280, Up to 7,300 MB/s - WDS100T2X0E
amazon logo

Cheap alternatives

User reviews

Overall rating

Western Digital WD Black SN850 1TB
10.0
1 User reviews
Western Digital WD Black SN850 1TB
10.0/10
1 User reviews
Western Digital WD Black SN850X 1TB
0.0
0 User reviews
Western Digital WD Black SN850X 1TB
0.0/10
0 User reviews

Comments

Ruder

Ruder

1 year ago

10 / 10

Best sad for gaming

Ruder

Ruder

1 year ago

10 / 10

0 users found this helpful

Read speed

sequential read speed

7000MB/s

7300MB/s

This is the maximum sequential read speed according to the manufacturer. High sequential read speeds are most useful when the system is reading very large files (such as videos) from the SSD.
random read speed

1000000IOPS

800000IOPS

This is the maximum random read speed according to the manufacturer. It is measured in IOPS (Input/Output Operations Per Second) and is a good indication of the read performance of the SSD in day-to-day usage.

Write speed

sequential write speed

5300MB/s

6300MB/s

This is the maximum sequential write speed according to the manufacturer. High sequential write speeds are most useful when the system is writing very large files (such as videos) to the SSD.
random write speed

720000IOPS

1100000IOPS

This is the maximum random write speed according to the manufacturer. It is measured in IOPS (Input/Output Operations Per Second) and is a good indication of the write performance of the SSD in day-to-day usage.

Benchmarks

The sequential write speed benchmark gives an indication of the SSD performance when writing large files. The value given here is the average result calculated from user-submitted scores. Source: UserBenchmark.
The sequential read speed benchmark gives an indication of the SSD performance when reading large files. The value given here is the average result calculated from user-submitted scores. Source: UserBenchmark.
random write speed (UserBenchmark)

187MB/s

Unknown. Help us by suggesting a value. (Western Digital WD Black SN850X 1TB)

The random write speed benchmark gives an indication of the everyday performance of the SSD. The value given here is the average result calculated from user-submitted scores. Source: UserBenchmark.
random read speed (UserBenchmark)

73.4MB/s

Unknown. Help us by suggesting a value. (Western Digital WD Black SN850X 1TB)

The random read speed benchmark gives an indication of the everyday performance of the SSD. The value given here is the average result calculated from user-submitted scores. Source: UserBenchmark.
PassMark result

38692

47701

The PassMark benchmark measures the overall performance of the SSD based on read speeds, write speeds, and seek times. The value given is an average based on user-submitted results.

General info

type

M2

M2

The type of SSD.
SSD cache

DRAM cache

DRAM cache

SSDs with a DRAM cache utilise high-speed RAM as a cache. This results in higher performance than DRAM-less SSDs, which use a slower NAND cache or the system’s RAM (HMB).
Is an NVMe SSD
✔Western Digital WD Black SN850 1TB
✔Western Digital WD Black SN850X 1TB
NVMe SSDs use the PCIe interface, which has a higher bandwidth than the SATA interface. This results in much faster read/write speeds compared to SSDs which use the SATA interface.
internal storage

1000GB

1000GB

The internal storage refers to the built-in storage space available in a device for system data, apps, and user-generated data. With a large amount of internal storage, you can save more files and apps on your device.
The storage type determines how many bits of data are written to each memory cell. These storage types include SLC (one bit per cell), MLC (two bits per cell), and TLC (three bits per cell). The less bits that are written to each cell, the greater the speed and reliability.
Peripheral Component Interconnect Express (PCIe) is a high-speed interface standard for connecting components, such as graphics cards and SSDs, to a motherboard. Newer versions can support more bandwidth and deliver better performance.
The controller is a processor that manages the functions of the SSD. The number of channels refers to the number of storage chips that this controller can access at once. Typically speaking, the more channels that the SSD controller has, the greater the performance.
Terabytes Written (TBW) is a measurement of the SSD's endurance, and often refers to the manufacturer's warranty. A higher TBW can be an indication of greater reliability over time.
MTBF

1.75million hours

1.75million hours

MTBF (Mean Time Between Failures) is the manufacturer’s estimation of the average time for a device to fail.

Which are the best SSDs?

Show all
This page is currently only available in English.