Average Bench: 74% (578th of 1058)

more Based on 17,692 user benchmarks.  Models: INTEL SSDSC2CW120A3, INTEL SSDSC2BW120A3, INTEL SSDSC2CW120A3H, INTE SSDSC2CW120A3, INTEL SS DSC2CW120A3, INTEL SSDSC2CW12, INTEL SSDSC2CW120A

The Intel 520 Series was Intel's first SSD to feature a Sandforce 2281 controller. This controller has powered countless SSDs over the last three years but is now dated and is known to be limited in the area of incompressible write speed. The 120GB Intel 520 scored peak and average sequential read/write speeds of 514/157 and 421/133. These read speeds are good but the peak write of 157 MB/s lags the group leaders average of 313 MB/s by nearly 100%. This relative inability to write lowers the 520's overall effective speed to 403 MB/s or 15% lower than the 459 MB/s achieved by the group leaders. At two years of age the Intel 520 can no longer compete with newer drives, there is far better value available amongst the group leaders[Feb '14 SSDrivePro]

Good average bench

The Intel 520 Series 120GB averaged 26.0% 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 Mixed IO Speed 169MB/s
Avg. 4K Random Read Speed 32MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the Intel 520 Series 120GB is 31.3%. This is a relatively narrow range which indicates that the Intel 520 Series 120GB performs reasonably consistently under varying real world conditions.


Avg. Sustained Write Speed 131MB/s
Avg. Sequential Write Speed 155MB/s

Average Bench

(Based on 17,692 samples)
Min Avg Max
313 Read 390 451
129 Write 155 170
180 Mixed 207 221
99.3 SusWrite 131 159
48.8% 221 MB/s
Min Avg Max
21 4K Read 32 39.9
42.1 4K Write 80 112
25 4K Mixed 36.4 45.9
137% 49.5 MB/s
Min Avg Max
149 DQ Read 218 239
108 DQ Write 149 166
125 DQ Mixed 169 192
130% 179 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
67GB free (System drive)
Firmware: 400i
SusWrite @10s intervals: 135 128 137 133 139 138 MB/s
Read 418
Write 160
Mixed 218
SusWrite 135
51% 232 MB/s
4K Read 42.1
4K Write 127
4K Mixed 47.6
192% 72.3 MB/s
DQ Read 238
DQ Write 151
DQ Mixed 163
130% 184 MB/s
28GB free (System drive)
Firmware: 400i
SusWrite @10s intervals: 129 122 126 115 112 113 MB/s
Read 401
Write 145
Mixed 202
SusWrite 120
48% 217 MB/s
4K Read 35.2
4K Write 86.9
4K Mixed 37.3
147% 53.1 MB/s
DQ Read 184
DQ Write 153
DQ Mixed 184
134% 174 MB/s
25GB free (System drive)
Firmware: 400i
SusWrite @10s intervals: 101 94 125 132 128 149 MB/s
Read 381
Write 79
Mixed 182
SusWrite 121
42% 191 MB/s
4K Read 28.9
4K Write 92.9
4K Mixed 39.3
143% 53.7 MB/s
DQ Read 234
DQ Write 151
DQ Mixed 155
126% 180 MB/s
32GB free (System drive)
Firmware: 400i
SusWrite @10s intervals: 114 111 107 107 104 104 MB/s
Read 377
Write 144
Mixed 212
SusWrite 108
46% 210 MB/s
4K Read 32.6
4K Write 70.3
4K Mixed 36.5
133% 46.5 MB/s
DQ Read 220
DQ Write 153
DQ Mixed 165
129% 179 MB/s
17,692 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 45,556,009 SSDs tested.


MSRP ≈ $160 @ launch in Feb '12
AmazonUS $17919 mins
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Typical 520 Series 120GB Builds (Compare 38,902 builds) See popular component choices, score breakdowns and rankings.
Gaming 2%
Tree trunk
Desktop 65%
Workstation 2%
Tree trunk

Disqualified System: bin bin

EDIT WITH CUSTOM PC BUILDER Value: 46% - Average Total price: $476

Popular 520 Series 120GB systems:

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.
  • - SkillBench (space shooter) tests user input accuracy.
  • - 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.
Solid State Drive Rankings (Price vs Performance) August 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: LSI SandForce SF2281. Flash Memory: Intel Synchronous 25nm MLC

Get fast, play fierce...

Added 7 years ago.


7 years ago.

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 i5-11600K $270Nvidia RTX 3070 $500Crucial MX500 250GB $45
Intel Core i5-11400F $260Nvidia RTX 3060-Ti $400Samsung 860 Evo 250GB $52
Intel Core i7-11700K $380Nvidia GTX 1660S (Super) $240Samsung 850 Evo 120GB $183
Seagate Barracuda 1TB (2016) $35Corsair Vengeance LPX DDR4 3200 C16 2x8GB $79SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $31Corsair Vengeance LPX DDR4 3000 C15 2x8GB $80SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $649SanDisk Ultra Fit 32GB $16
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