Average Bench: 69.1% (603rd of 1011)

Based on 19,248 user benchmarks.  Model: Samsung SSD 840 Series

The Samsung 840 is the budget version of the 840 Pro, the main difference between the hardware on the two drives is the type of flash memory used. The cheaper 840 uses TLC NAND which is cheaper than the MLC found in the Pro version of this drive. The performance hit as a result of the cheaper TLC memory is approximately 30%. The 840 delvers both average real world speeds (435 MB/s) and average enterprise speeds (AS-SSD Total Score 920). The relative weak spots in this drives performance profile are its write ability, where it scores just 254 MB/s in the sequential write test. The upside to the lost performance over the Pro version is a significant reduction in price which leaves this drive an average value for money proposition at its current price of £135. There are, however, better value drives to be had elsewhere including Samsungs own newly released EVO which effectively supersedes the 840. [Aug '13 SSDrivePro]


Above average average bench

The Samsung 840 250GB averaged 30.9% lower than the peak scores attained by the group leaders. This isn't a great result which indicates that there are much faster alternatives on the comparison list.


Avg. 4K-64Thread Read Speed 313MB/s
Avg. 4K Random Read Speed 25.5MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the Samsung 840 250GB is 36.1%. This is a relatively wide range which indicates that the Samsung 840 250GB performs inconsistently under varying real world conditions.


Avg. Sequential Mixed IO Speed 150MB/s
Avg. Sustained Write Speed 176MB/s

Average Bench

(Based on 19,248 samples)
Min Avg Max
311 Read 417 483
65.5 Write 193 254
94.2 Mixed 150 178
50.2 SusWrite 176 248
51.7% 234 MB/s
Min Avg Max
18.8 4K Read 25.5 30.3
35.2 4K Write 69.9 102
16.8 4K Mixed 22.2 25.9
104% 39.2 MB/s
Min Avg Max
142 DQ Read 313 369
72.9 DQ Write 166 219
41.3 DQ Mixed 55.2 59.4
90.3% 178 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
139GB free (System drive)
Firmware: DXT06B0Q
SusWrite @10s intervals: 215 242 244 247 243 249 MB/s
Read 426
Write 254
Mixed 171
SusWrite 240
61% 273 MB/s
4K Read 29.3
4K Write 93.6
4K Mixed 26.3
128% 49.7 MB/s
DQ Read 353
DQ Write 214
DQ Mixed 59.7
105% 209 MB/s
115GB free (System drive)
Firmware: DXT0AB0Q
SusWrite @10s intervals: 119 99 91 98 104 94 MB/s
Read 441
Write 149
Mixed 146
SusWrite 101
46% 209 MB/s
4K Read 29.4
4K Write 71.1
4K Mixed 22.4
111% 41 MB/s
DQ Read 346
DQ Write 117
DQ Mixed 57.2
88% 174 MB/s
84GB free (System drive)
Firmware: DXT06B0Q
SusWrite @10s intervals: 79 79 99 93 85 88 MB/s
Read 298
Write 91.7
Mixed 93
SusWrite 86.9
31% 142 MB/s
4K Read 20.4
4K Write 43.7
4K Mixed 20
80% 28 MB/s
DQ Read 27.5
DQ Write 76.6
DQ Mixed 23.4
26% 42.5 MB/s
19,248 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 17,667,174 SSDs tested.


Approx. $195 @ launch in Oct '12
AmazonUS $19912 months
OutletPCUS $20816 months
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Typical 840 250GB Builds (Compare 15,198 builds) See popular component choices, score breakdowns and rankings.
Gaming 47%
Desktop 60%
Workstation 33%
Sail boat

Motherboard: Asrock Z77 Extreme4 - $167

EDIT WITH CUSTOM PC BUILDER Value: 33% - Below average Total price: $960

Popular 840 250GB compatible motherboards:

How Fast Is Your SSD? (Bench your build) Size up your PC in less than a minute.

Welcome to our freeware PC speed test tool. UserBenchmark will test your PC and compare the results to other users with the same components. You can quickly size up your PC, identify hardware problems and explore the best upgrades.

UserBenchmark of the month

How it works

  • - Download and run UserBenchMark.
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write, sustained write and mixed IO.
  • - RAM tests include: single/multi core bandwidth and latency.
  • - Reports are generated and presented on userbenchmark.com.
  • - Identify the strongest components in your PC.
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  • - Share your opinion by voting.
Solid State Drive Rankings (Price vs Performance) September 2019 SSD Rankings.

Welcome to our 2.5" and M.2 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.
  • Best value for money - Value for money is based on real world performance.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.


Controller: Samsung 3-core MDX. Flash Memory: Samsung 21nm Toggle Mode TLC

The single best upgrade for your PC...

Added 6 years ago.

Very poor

6 years ago.

Review  hexus.net/...

Image  img.hexus.net/...
AS SSD Benchmark Speed Test

AS SSD Benchmark Speed Test

Review  www.hardocp.com/...

Review  thessdreview.com/...

1011 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.

 Frequently Asked Questions

 Best User Rated

The Best.
Intel Core i5-9400F $140Nvidia GTX 1660 $220Samsung 850 Evo 250GB $70
Intel Core i5-9600K $225Nvidia GTX 1660-Ti $278Samsung 850 Evo 500GB $105
AMD Ryzen 5 3600 $195Nvidia RTX 2060S (Super) $429Samsung 850 Pro 256GB $203
Seagate Barracuda 1TB (2016) $39Corsair Vengeance LPX DDR4 3000 C15 2x8GB $70SanDisk Extreme 64GB $88
WD Blue 1TB (2012) $37G.SKILL Trident Z DDR4 3200 C14 4x16GB $606SanDisk Extreme 32GB $48
Seagate Barracuda 3TB (2016) $64Corsair Vengeance LPX DDR4 3200 C16 2x8GB $73SanDisk Extreme 16GB $24
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