Average Bench: 89.7% (212th of 964)

Based on 40,242 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 10.2% 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 152MB/s
Avg. 4K Random Read Speed 38.4MB/s

Below average consistency

The range of scores (95th - 5th percentile) for the Samsung 840 Evo 120GB is 50%. 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 125MB/s
Avg. Sequential Mixed IO Speed 295MB/s

Average Bench

(Based on 40,242 samples)
Min Avg Max
341 Read 454 504
200 Write 403 488
155 Mixed 295 377
55 SusWrite 125 178
71.2% 319 MB/s
Min Avg Max
26.2 4K Read 38.4 46.9
39.6 4K Write 88.2 118
25.5 4K Mixed 45.3 55.7
163% 57.3 MB/s
Min Avg Max
43.4 DQ Read 322 381
98 DQ Write 293 360
51 DQ Mixed 152 180
156% 255 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
70GB free (System drive)
Firmware: EXT0BB6Q
SusWrite @10s intervals: 281 145 142 127 144 111 MB/s
Read 499
Write 469
Mixed 368
SusWrite 158
84% 374 MB/s
4K Read 44.7
4K Write 110
4K Mixed 53.9
195% 69.4 MB/s
DQ Read 376
DQ Write 348
DQ Mixed 176
183% 300 MB/s
47GB free (System drive)
Firmware: EXT0DB6Q
SusWrite @10s intervals: 265 130 132 131 132 132 MB/s
Read 473
Write 470
Mixed 321
SusWrite 154
79% 354 MB/s
4K Read 40.2
4K Write 91.8
4K Mixed 49.5
173% 60.5 MB/s
DQ Read 373
DQ Write 352
DQ Mixed 175
183% 300 MB/s
111GB free
Firmware: EXT0BB6Q
SusWrite @10s intervals: 290 144 143 143 143 143 MB/s
Read 447
Write 334
Mixed 334
SusWrite 168
72% 321 MB/s
4K Read 35.1
4K Write 103
4K Mixed 45.3
166% 61.1 MB/s
DQ Read 370
DQ Write 347
DQ Mixed 177
183% 298 MB/s
98GB free
Firmware: EXT0DB6Q
SusWrite @10s intervals: 275 176 146 146 146 138 MB/s
Read 454
Write 383
Mixed 353
SusWrite 171
76% 340 MB/s
4K Read 33.3
4K Write 69.1
4K Mixed 41.6
140% 48 MB/s
DQ Read 265
DQ Write 244
DQ Mixed 144
138% 218 MB/s
40,242 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 9,689,415 SSDs tested.


Approx. $95 @ launch in Jul '13
OutletPCUS $1386 months
EbayUS $1659 mins
AmazonUS $2901 month
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Typical 840 Evo 120GB Builds (Compare 7,207 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) November 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.

Good (edit your comment) Add link

25 days ago.

Suffers from severe performance degradation.


3 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


7 months ago.

best performance for this price


2 years ago.

Price vs Performance that drive is perfect


18 months ago.

Super Fast and Price is exelent


17 months ago.

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


14 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

964 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 i7-8700K $359Nvidia GTX 1070 $340Samsung 850 Evo 250GB $77
AMD Ryzen 5 1600 $130Nvidia GTX 1060-6GB $234Samsung 850 Evo 500GB $100
Intel Core i5-8600K $237AMD RX 480 $280Samsung 850 Pro 256GB $163
Seagate Barracuda 1TB (2016) $40Corsair Vengeance LPX DDR4 3000 C15 2x8GB $130SanDisk Extreme 64GB $43
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $869SanDisk Extreme 32GB $48
WD Blue 1TB (2012) $45Corsair Vengeance LPX DDR4 3200 C16 2x8GB $130SanDisk Ultra Fit 32GB $12
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