Average Bench: 492% (8th of 1080)

Based on 37,629 user benchmarks.  Models: WD_BLACK SN850X 2000GB, WD_BLACK SN850X HS 2000GB

The WD Black SN850X has a superb consumer performance profile. As well as offering solid burst speeds of 5 GB/s, the SN850X also offers respectable out of cache performance. At current prices (1TB $90 USD, 2TB $145 USD and 4TB $290 USD) the WD Black SN850X is our top value pick at every capacity. [Jun '24 SSDrivePro]

Outstanding average bench

The WD Black SN850X M.2 2TB averaged 391.7% higher than the peak scores attained by the group leaders. This is an excellent result which ranks the WD Black SN850X M.2 2TB near the top of the comparison list.


Avg. 4K-64Thread Mixed IO Speed 1,570MB/s
Avg. Sequential Write Speed 3,872MB/s

Terrible consistency

The range of scores (95th - 5th percentile) for the WD Black SN850X M.2 2TB is 372%. This is a particularly wide range which indicates that the WD Black SN850X M.2 2TB performs inconsistently under varying real world conditions.


Avg. 4K Random Write Speed 184MB/s
Avg. 4K Random Mixed IO Speed 82.8MB/s

Average Bench

(Based on 37,629 samples)
Min Avg Max
2,150 Read 3,802 4,680
1,941 Write 3,872 4,993
1,729 Mixed 2,917 3,538
1,249 SusWrite 2,856 4,587
756% 3,362 MB/s
Min Avg Max
47.6 4K Read 70.9 84.8
72 4K Write 184 310
54.2 4K Mixed 82.8 113
311% 113 MB/s
Min Avg Max
903 DQ Read 1,799 2,409
432 DQ Write 1,387 2,012
618 DQ Mixed 1,570 2,180
1,180% 1,585 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
1.5TB free
Firmware: 620361WD
SusWrite @10s intervals: 4274 4681 4881 4889 3370 2133 MB/s
Read 4,264
Write 4,354
Mixed 3294
SusWrite 4038
899% 3,988 MB/s
4K Read 65.5
4K Write 284
4K Mixed 90.6
365% 147 MB/s
DQ Read 2,304
DQ Write 1,955
DQ Mixed 2,061
1,563% 2,107 MB/s
990GB free (System drive)
Firmware: 620331WD
SusWrite @10s intervals: 4642 3729 2253 2006 1951 2076 MB/s
Read 4,493
Write 4,969
Mixed 3,415
SusWrite 2,776
880% 3,913 MB/s
4K Read 69.7
4K Write 239
4K Mixed 92.2
350% 134 MB/s
DQ Read 1899
DQ Write 1,463
DQ Mixed 1,671
1,253% 1,678 MB/s
1TB free (System drive)
Firmware: 620311WD
SusWrite @10s intervals: 3657 3904 4048 3749 1645 1685 MB/s
Read 4,264
Write 4,079
Mixed 3157
SusWrite 3,115
821% 3,654 MB/s
4K Read 71.8
4K Write 203
4K Mixed 89.7
331% 122 MB/s
DQ Read 1,378
DQ Write 1299
DQ Mixed 1,380
1,025% 1,352 MB/s
487GB free
Firmware: 620311WD
SusWrite @10s intervals: 1346 1406 1408 1407 1386 1083 MB/s
Read 1432
Write 1,406
Mixed 1,328
SusWrite 1,339
310% 1,376 MB/s
4K Read 69.2
4K Write 212
4K Mixed 89.1
331% 123 MB/s
DQ Read 1,533
DQ Write 1470
DQ Mixed 1877
1,306% 1,627 MB/s
37,629 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 76,491,656 SSDs tested


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MSRP ≈ $290 @ launch in Aug '22
AmazonUS $14023 mins
EbayUS $1704 mins
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Typical Black SN850X M.2 2TB Builds (Compare 9,684 builds) See popular component choices, score breakdowns and rankings
Gaming 291%
Desktop 123%
Workstation 346%

Motherboard: Gigabyte Z790 AORUS ELITE AX - $200

EDIT WITH CUSTOM PC BUILDER Value: 119% - Outstanding Total price: $1,466

Popular Black SN850X M.2 2TB compatible motherboards:

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Welcome to our SSD comparison. We calculate effective speed for both SATA and NVMe drives based on real world performance then adjust by current prices per GB to yield a value for money rating. Our calculated values are checked against thousands of individual user ratings. The customizable table below combines these factors to bring you the definitive list of top SSDs. [SSDrivePro]


Group Test Results

  • Best user rated - User sentiment trumps benchmarks for this comparison.
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  • Fastest real world speed - Real World Speed measures performance for typical consumers.


1080 Drives (Compared) Thousands of user benchmarks compiled into one comparison list

See how consistently different SSDs perform with varying real world conditions. The charts also illustrate overall performance, popularity and rank.

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The Best
Intel Core i5-12600K $175Nvidia RTX 4060 $293WD Black SN850X M.2 2TB $140
Intel Core i5-13600K $240Nvidia RTX 4070 $499WD Black SN850X M.2 1TB $92
Intel Core i5-12400F $110Nvidia RTX 4060-Ti $390Crucial T700 M.2 4TB $342
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