Average Bench: 70.1% (628th of 1037)

Based on 28,449 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]

Good average bench

The Samsung 840 250GB averaged 29.8% 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 318MB/s
Avg. 4K Random Read Speed 25.8MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the Samsung 840 250GB is 35.1%. 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 152MB/s
Avg. Sustained Write Speed 180MB/s

Average Bench

(Based on 28,449 samples)
Min Avg Max
311 Read 420 482
61.3 Write 195 255
95.6 Mixed 152 177
54.5 SusWrite 180 249
52.3% 237 MB/s
Min Avg Max
18.8 4K Read 25.8 30.3
40.2 4K Write 72 102
16.2 4K Mixed 22.3 26.3
106% 40 MB/s
Min Avg Max
190 DQ Read 318 369
67.2 DQ Write 167 219
40.5 DQ Mixed 54.2 59.7
90.6% 180 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
117GB free
Firmware: DXT08B0Q
SusWrite @10s intervals: 204 244 247 246 245 248 MB/s
Read 436
Write 248
Mixed 161
SusWrite 239
60% 271 MB/s
4K Read 25.4
4K Write 94
4K Mixed 22.4
117% 47.3 MB/s
DQ Read 366
DQ Write 218
DQ Mixed 55.5
105% 213 MB/s
232GB free
Firmware: DXT07B0Q
SusWrite @10s intervals: 243 249 247 249 250 250 MB/s
Read 457
Write 223
Mixed 176
SusWrite 248
61% 276 MB/s
4K Read 27.3
4K Write 69.1
4K Mixed 24.3
109% 40.2 MB/s
DQ Read 211
DQ Write 186
DQ Mixed 53.6
80% 150 MB/s
70GB free
Firmware: DXT0AB0Q
SusWrite @10s intervals: 211 209 203 212 186 196 MB/s
Read 440
Write 216
Mixed 168
SusWrite 203
57% 257 MB/s
4K Read 27.8
4K Write 73.9
4K Mixed 24.9
113% 42.2 MB/s
DQ Read 213
DQ Write 166
DQ Mixed 37.8
70% 139 MB/s
221GB free
Firmware: DXT06B0Q
SusWrite @10s intervals: 244 243 245 245 245 245 MB/s
Read 454
Write 242
Mixed 166
SusWrite 245
61% 277 MB/s
4K Read 20.7
4K Write 54.8
4K Mixed 19.7
86% 31.7 MB/s
DQ Read 364
DQ Write 212
DQ Mixed 56.8
104% 211 MB/s
28,449 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 31,644,226 SSDs tested.


Approx. $195 @ launch in Oct '12
AmazonUS $1992 years
OutletPCUS $2082 years
Send price feedback
Typical 840 250GB Builds (Compare 4,583 builds) See popular component choices, score breakdowns and rankings.
Gaming 42%
Speed boat
Desktop 82%
Aircraft carrier
Workstation 33%
Sail boat

Motherboard: Asus P8Z77-V LX

EDIT WITH CUSTOM PC BUILDER Value: 37% - Below average Total price: $794

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.

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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.
  • - See speed test results from other users.
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  • - Explore your best upgrade options with a virtual PC build.
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  • - Share your opinion by voting.
Solid State Drive Rankings (Price vs Performance) September 2020 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 7 years ago.

Very poor

7 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/...

1037 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 i5-9600K $195Nvidia GTX 1660S (Super) $230Crucial MX500 250GB $45
Intel Core i5-9400F $140Nvidia GTX 1650S (Super) $170Samsung 850 Evo 120GB $78
Intel Core i7-9700K $299Nvidia RTX 2070S (Super) $505Samsung 860 Evo 250GB $43
Seagate Barracuda 1TB (2016) $35Corsair Vengeance LPX DDR4 3200 C16 2x8GB $69SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $32Corsair Vengeance LPX DDR4 3000 C15 2x8GB $65SanDisk Extreme 32GB $30
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $649SanDisk Extreme 16GB $28
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