Average Bench: 89.3% (326th of 1058)

Based on 90,416 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]

Very good average bench

The Samsung 840 Evo 120GB averaged just 10.6% 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 156MB/s
Avg. 4K Random Read Speed 38.3MB/s

Average consistency

The range of scores (95th - 5th percentile) for the Samsung 840 Evo 120GB is 46.2%. 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 130MB/s
Avg. Sequential Mixed IO Speed 307MB/s

Average Bench

(Based on 90,416 samples)
Min Avg Max
360 Read 462 504
257 Write 399 488
225 Mixed 307 381
57.2 SusWrite 130 178
72.4% 324 MB/s
Min Avg Max
27 4K Read 38.3 45.7
40.4 4K Write 83.2 113
28.3 4K Mixed 44.7 54.7
159% 55.4 MB/s
Min Avg Max
46.1 DQ Read 329 382
98.5 DQ Write 288 361
50.9 DQ Mixed 156 181
159% 258 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
44GB free (System drive)
Firmware: EXT0BB0Q
SusWrite @10s intervals: 283 42 40 43 42 43 MB/s
Read 501
Write 399
Mixed 295
SusWrite 82.2
71% 319 MB/s
4K Read 45.4
4K Write 94.2
4K Mixed 50.8
184% 63.5 MB/s
DQ Read 374
DQ Write 341
DQ Mixed 173
180% 296 MB/s
45GB free (System drive)
Firmware: EXT0CB6Q
SusWrite @10s intervals: 247 117 85 75 68 67 MB/s
Read 489
Write 466
Mixed 303
SusWrite 110
76% 342 MB/s
4K Read 39
4K Write 85.1
4K Mixed 47.9
166% 57.3 MB/s
DQ Read 366
DQ Write 348
DQ Mixed 173
180% 295 MB/s
84GB free
Firmware: EXT0DB6Q
SusWrite @10s intervals: 298 131 131 130 130 131 MB/s
Read 492
Write 446
Mixed 386
SusWrite 159
83% 371 MB/s
4K Read 39.4
4K Write 77.8
4K Mixed 46.8
161% 54.7 MB/s
DQ Read 218
DQ Write 185
DQ Mixed 134
119% 179 MB/s
90,416 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 41,720,122 SSDs tested.


MSRP ≈ $95 @ launch in Jul '13
EbayUS $4421 mins
OutletPCUS $1382 years
AmazonUS $1805 mins
Send price feedback
Typical 840 Evo 120GB Builds (Compare 6,084 builds) See popular component choices, score breakdowns and rankings.
Gaming 63%
Desktop 83%
Aircraft carrier
Workstation 49%

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

EDIT WITH CUSTOM PC BUILDER Value: 64% - Good Total price: $796

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) April 2021 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 7 years ago.

Good (edit your comment) Add link

9 months ago.

Fast and Cheap SSD for a great price


2 years 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


2 years ago.

best performance for this price


4 years ago.

Price vs Performance that drive is perfect


3 years ago.

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


3 years ago.

Super Fast and Price is exelent


3 years ago.

my first samsung ssd. very good performance and price.


4 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

6 years ago.


6 years ago.

Low price , higher access , more faster !


18 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.


6 years ago.

This SSD is perfect.


6 years ago.

awesome ssd

1058 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 i5-11400F $173Nvidia RTX 3070 $500Crucial MX500 250GB $48
Intel Core i5-11600K $265Nvidia RTX 3060-Ti $400Samsung 850 Evo 120GB $78
Intel Core i7-10700K $316Nvidia GTX 1660S (Super) $240Samsung 860 Evo 250GB $50
Seagate Barracuda 1TB (2016) $40Corsair Vengeance LPX DDR4 3200 C16 2x8GB $79SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $34Corsair Vengeance LPX DDR4 3000 C15 2x8GB $73SanDisk Extreme 32GB $28
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $649SanDisk Ultra Fit 32GB $16
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