Average Bench: 92.4% (177th of 956)

Based on 37,131 user benchmarks.  Models: Samsung SSD 840 EVO 120GB, Samsung SSD 840 EVO 1, Samsung SSD 840 EVO 120G, Samsung SSD 840 EVO

The 120GB Evo, like its 250GB sibling, features a second level Turbowrite cache (TWC). This 3GB block of high speed SLC memory allows the Evo to write data at 370 MB/s, nearly double its normal rate. When the TWC is full write speeds drop by around 50% but since consumers generally write less than 3GB in a typical write operation, the performance drop will rarely be noticed. On the other hand, in a server environment this sort of performance degradation would be unacceptable. Comparing the 120GB and 250GB Evos shows that they have similar performance profiles. The performance equivalence between the different capacities, coupled with the fact that their prices are almost linear, implies that both capacities represent roughly the same value for money. Within its TWC, the 120GB Evo is capable of chart topping burst IO rates and it sits squarely amongst the best performing 120GB drives. [Aug '14 SSDrivePro]


Excellent average bench

The Samsung 840 Evo 120GB averaged just 7.6% lower than the peak scores attained by the group leaders. This is an excellent result which ranks the Samsung 840 Evo 120GB near the top of the comparison list.


Avg. 4K-64Thread Mixed IO Speed 161MB/s
Avg. 4K Random Mixed IO Speed 46.4MB/s

Average consistency

The range of scores (95th - 5th percentile) for the Samsung 840 Evo 120GB is 42.7%. This is a relatively wide range which indicates that the Samsung 840 Evo 120GB performs inconsistently under varying real world conditions.


Avg. Sustained Write Speed 129MB/s
Avg. Sequential Mixed IO Speed 307MB/s

Average Bench

(Based on 37,131 samples)
Min Avg Max
356 Read 462 505
265 Write 415 489
241 Mixed 307 389
56.9 SusWrite 129 176
73.3% 328 MB/s
Min Avg Max
26.1 4K Read 38.8 46.9
44.4 4K Write 92 122
28.6 4K Mixed 46.4 56.3
167% 59.1 MB/s
Min Avg Max
103 DQ Read 340 381
122 DQ Write 310 354
59 DQ Mixed 161 180
165% 270 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
91GB free
Firmware: EXT0BB6Q
SusWrite @10s intervals: 327 143 143 143 143 143 MB/s
Read 453
Write 438
Mixed 330
SusWrite 174
78% 349 MB/s
4K Read 42.6
4K Write 118
4K Mixed 55.7
198% 72 MB/s
DQ Read 375
DQ Write 346
DQ Mixed 175
182% 299 MB/s
65GB free
Firmware: EXT0BB6Q
SusWrite @10s intervals: 311 146 146 146 146 146 MB/s
Read 487
Write 467
Mixed 359
SusWrite 174
83% 372 MB/s
4K Read 44.9
4K Write 107
4K Mixed 53.4
193% 68.3 MB/s
DQ Read 377
DQ Write 344
DQ Mixed 179
184% 300 MB/s
62GB free
Firmware: EXT0DB6Q
SusWrite @10s intervals: 172 168 145 146 145 145 MB/s
Read 466
Write 456
Mixed 388
SusWrite 154
82% 366 MB/s
4K Read 42.1
4K Write 113
4K Mixed 51.7
190% 68.9 MB/s
DQ Read 282
DQ Write 343
DQ Mixed 183
174% 269 MB/s
67GB free
Firmware: EXT0DB6Q
SusWrite @10s intervals: 299 142 142 142 142 142 MB/s
Read 502
Write 485
Mixed 330
SusWrite 168
83% 371 MB/s
4K Read 41.6
4K Write 94.5
4K Mixed 50.3
178% 62.1 MB/s
DQ Read 313
DQ Write 306
DQ Mixed 176
169% 265 MB/s
37,131 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 8,642,731 SSDs tested.


Approx. $95 @ launch in Jul '13
OutletPCUS $1384 months
EbayUS $1659 mins
AmazonUS $2901 day
Send price feedback
Typical 840 Evo 120GB Builds (Compare 8,030 builds) See popular component choices, score breakdowns and rankings.
Gaming 48%
Desktop 68%
Battle cruiser
Workstation 40%
Jet ski

Motherboard: MSI Z87-G45 GAMING (MS-7821) - $242

EDIT WITH CUSTOM PC BUILDER Value: 63% - Good Total price: $909

Popular 840 Evo 120GB 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.
  • - See speed test results from other users.
  • - Compare your components to the current market leaders.
  • - Explore your best upgrade options with a virtual PC build.
  • - Compare your in-game FPS to other users with your hardware.
  • - Share your opinion by voting.
Solid State Drive Rankings (Price vs Performance) September 2018 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 MEX. Memory: Samsung 19nm Toggle Mode TLC

Experience a brand new, faster performance...

Added 4 years ago.

Excellent (edit your comment) Add link

1 month ago.

Suffers from severe performance degradation.


1 month ago.


Good for general purpose use - best compromise between Price and performance. I have bought over 20 of these to retrofit into Laptops and desktop pc's to give a performance boost especially with a clean Windows 8.1 install. Makes a cheap Celeron Laptop fly like a new core i5 laptop with a standard electro-mechanical Hdd. PC World will not sell computers with SSD's in because if people savvy the huge performance boot you get with an SSD they will just buy a cheap sub £200 laptop and clone the disk to an SSD. Dell hike their prices to fit a 250GB SSD when you buy a new PC by £350 - WHAT A RIP OFF, No wonder they are going out of business. The 250GB and 500GB Samsung SSD's are equally good - recommended in fact. I have bought all of these in some quantity.—Oct '14


6 months ago.

best performance for this price


2 years ago.

Price vs Performance that drive is perfect


16 months ago.

Super Fast and Price is exelent


15 months ago.

i love this ssd, still fast on my old laptop with SATA 2.


12 months ago.

my first samsung ssd. very good performance and price.


2 years ago.

Works really great. I've had it for 3 months already and had no troubles with it. It's fast and cheap. My 4 year old HP DV7-3180us feels like new with it.

Above average

4 years ago.


3 years ago.

Low price , higher access , more faster !


4 years ago.

This SSD is perfect.


3 years ago.

awesome ssd

956 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

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AMD Ryzen 5 1600 $150Nvidia GTX 1060-6GB $269Samsung 850 Evo 500GB $115
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Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $869SanDisk Extreme 32GB $30
Seagate Barracuda 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $155SanDisk Ultra Fit 32GB $11
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