Average Bench: 73.4% (565th of 1037)

more Based on 14,738 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 26.6% 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 166MB/s
Avg. 4K Random Read Speed 31.8MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the Intel 520 Series 120GB is 32.8%. 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 153MB/s

Average Bench

(Based on 14,738 samples)
Min Avg Max
302 Read 388 447
124 Write 153 170
171 Mixed 206 221
99.4 SusWrite 131 159
48.5% 219 MB/s
Min Avg Max
21.7 4K Read 31.8 39.9
38.1 4K Write 78.9 115
24.5 4K Mixed 36.2 45.9
136% 48.9 MB/s
Min Avg Max
125 DQ Read 215 239
114 DQ Write 148 167
74.8 DQ Mixed 166 192
128% 176 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
52GB free (System drive)
Firmware: 400i
SusWrite @10s intervals: 134 131 135 124 109 105 MB/s
Read 431
Write 153
Mixed 214
SusWrite 123
51% 230 MB/s
4K Read 40.1
4K Write 108
4K Mixed 46.7
178% 64.8 MB/s
DQ Read 238
DQ Write 152
DQ Mixed 184
140% 192 MB/s
37GB free
Firmware: 400i
SusWrite @10s intervals: 121 140 140 138 137 140 MB/s
Read 339
Write 158
Mixed 206
SusWrite 136
46% 210 MB/s
4K Read 30.7
4K Write 66.6
4K Mixed 34.5
126% 43.9 MB/s
DQ Read 232
DQ Write 158
DQ Mixed 177
137% 189 MB/s
45GB free (System drive)
Firmware: 400i
SusWrite @10s intervals: 141 134 138 137 135 140 MB/s
Read 409
Write 160
Mixed 217
SusWrite 138
51% 231 MB/s
4K Read 25.8
4K Write 49.5
4K Mixed 28.5
102% 34.6 MB/s
DQ Read 236
DQ Write 156
DQ Mixed 174
136% 189 MB/s
548GB free
Firmware: 400i
SusWrite @10s intervals: 84 84 84 84 85 84 MB/s
Read 305
Write 157
Mixed 200
SusWrite 84.2
41% 187 MB/s
4K Read 24.8
4K Write 47.4
4K Mixed 29.3
100% 33.8 MB/s
DQ Read 213
DQ Write 164
DQ Mixed 155
125% 178 MB/s
14,738 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 31,731,170 SSDs tested.


Approx. $160 @ launch in Feb '12
AmazonUS $1794 mins
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Typical 520 Series 120GB Builds (Compare 19,271 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: 45% - Average Total price: $405

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.
  • - 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 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: LSI SandForce SF2281. Flash Memory: Intel Synchronous 25nm MLC

Get fast, play fierce...

Added 6 years ago.


6 years ago.

1037 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 i5-9600K $195Nvidia GTX 1660S (Super) $230Crucial MX500 250GB $44
Intel Core i5-9400F $140Nvidia GTX 1650S (Super) $170Samsung 850 Evo 120GB $78
Intel Core i7-9700K $290Nvidia RTX 2070S (Super) $505Samsung 860 Evo 250GB $42
Seagate Barracuda 1TB (2016) $43Corsair Vengeance LPX DDR4 3200 C16 2x8GB $69SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $32Corsair Vengeance LPX DDR4 3000 C15 2x8GB $65SanDisk Extreme 32GB $30
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $649SanDisk Extreme 16GB $28
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