Average Bench: 90.6% (271st of 1016)

Based on 69,830 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 9.3% 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 154MB/s
Avg. 4K Random Read Speed 38.9MB/s

Average consistency

The range of scores (95th - 5th percentile) for the Samsung 840 Evo 120GB is 49.2%. 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 132MB/s
Avg. Sequential Mixed IO Speed 306MB/s

Average Bench

(Based on 69,830 samples)
Min Avg Max
356 Read 460 504
238 Write 404 487
224 Mixed 306 391
58.3 SusWrite 132 178
72.6% 326 MB/s
Min Avg Max
25.9 4K Read 38.9 46.7
44.9 4K Write 87.8 120
27 4K Mixed 45.8 55.2
164% 57.5 MB/s
Min Avg Max
44.5 DQ Read 318 382
96.8 DQ Write 290 362
53 DQ Mixed 154 180
157% 254 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
23GB free
Firmware: EXT0DB6Q
SusWrite @10s intervals: 286 115 109 103 100 91 MB/s
Read 508
Write 351
Mixed 367
SusWrite 134
76% 340 MB/s
4K Read 46
4K Write 122
4K Mixed 55.7
206% 74.6 MB/s
DQ Read 379
DQ Write 344
DQ Mixed 178
184% 300 MB/s
28GB free (System drive)
Firmware: EXT0DB6Q
SusWrite @10s intervals: 228 170 142 142 136 100 MB/s
Read 498
Write 481
Mixed 358
SusWrite 153
83% 372 MB/s
4K Read 44.3
4K Write 111
4K Mixed 52.8
194% 69.5 MB/s
DQ Read 378
DQ Write 349
DQ Mixed 174
183% 300 MB/s
41GB free (System drive)
Firmware: EXT0DB6Q
SusWrite @10s intervals: 276 118 120 122 119 120 MB/s
Read 494
Write 486
Mixed 329
SusWrite 146
81% 364 MB/s
4K Read 43.5
4K Write 103
4K Mixed 52.3
187% 66.2 MB/s
DQ Read 379
DQ Write 360
DQ Mixed 182
188% 307 MB/s
41GB free (System drive)
Firmware: EXT0BB6Q
SusWrite @10s intervals: 249 52 48 50 50 49 MB/s
Read 480
Write 463
Mixed 299
SusWrite 83
74% 331 MB/s
4K Read 35.2
4K Write 69.4
4K Mixed 42.4
144% 49 MB/s
DQ Read 379
DQ Write 343
DQ Mixed 177
183% 300 MB/s
69,830 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 21,682,322 SSDs tested.


Approx. $95 @ launch in Jul '13
OutletPCUS $13820 months
EbayUS $20018 mins
AmazonUS $20012 mins
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Typical 840 Evo 120GB Builds (Compare 13,360 builds) See popular component choices, score breakdowns and rankings.
Gaming 70%
Desktop 67%
Battle cruiser
Workstation 37%
Jet ski

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

EDIT WITH CUSTOM PC BUILDER Value: 51% - Above average Total price: $936

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) January 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 MEX. Memory: Samsung 19nm Toggle Mode TLC

Experience a brand new, faster performance...

Added 5 years ago.

Good (edit your comment) Add link

11 months ago.

Fast and Cheap SSD for a great price


18 months 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


10 months ago.

best performance for this price


3 years ago.

Price vs Performance that drive is perfect


2 years ago.

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


2 years ago.

Super Fast and Price is exelent


2 years ago.

my first samsung ssd. very good performance and price.


3 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

5 years ago.


4 years ago.

Low price , higher access , more faster !


3 months ago.

Had this in my system for 5 years now. It didnt lose any performance or gave me any errors. Its still a fast little OS SSD and is still supported via software from samsungs side.


5 years ago.

This SSD is perfect.


5 years ago.

awesome ssd

1016 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

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Intel Core i5-9400F $155Nvidia GTX 1650S (Super) $170Samsung 850 Evo 120GB $78
Intel Core i7-9700K $370Nvidia RTX 2060 $340Samsung 850 Pro 512GB $204
Seagate Barracuda 1TB (2016) $37Corsair Vengeance LPX DDR4 3200 C16 2x8GB $73SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $40Corsair Vengeance LPX DDR4 3000 C15 2x8GB $63SanDisk Extreme 32GB $46
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $643SanDisk Ultra Fit 32GB $16
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