Average Bench: 61.7% (550th of 921)

Based on 8,862 user benchmarks.  Models: ADAT SP550, ADATA SP550, ADATA SP 550

Above average average bench

The Adata Premier SP550 120GB averaged 38.2% 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 Random Read Speed 25.6MB/s
Avg. Sequential Read Speed 472MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the Adata Premier SP550 120GB is 32.9%. This is a relatively narrow range which indicates that the Adata Premier SP550 120GB performs reasonably consistently under varying real world conditions.


Avg. 4K-64Thread Mixed IO Speed 31.1MB/s
Avg. Sequential Write Speed 204MB/s

Average Bench

(Based on 8,862 samples)
Min Avg Max
360 Read 472 495
174 Write 204 249
184 Mixed 232 265
66.3% 302 MB/s
Min Avg Max
16.7 4K Read 25.6 37.5
19.9 4K Write 43.2 60.3
8.36 4K Mixed 16.8 27.9
83.2% 28.6 MB/s
Min Avg Max
20.9 DQ Read 148 285
33 DQ Write 109 172
8.33 DQ Mixed 31.1 51
49.7% 96.2 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
11GB free
Firmware: O1230C Max speed: SATA 3.0 600 MB/s
Read 490
Write 201
Mixed 200
65% 297 MB/s
4K Read 29
4K Write 56.6
4K Mixed 21.6
102% 35.7 MB/s
DQ Read 253
DQ Write 138
DQ Mixed 50
76% 147 MB/s
25GB free
Firmware: O1230C Max speed: SATA 3.0 600 MB/s
Read 483
Write 205
Mixed 234
67% 308 MB/s
4K Read 23
4K Write 55.2
4K Mixed 21.4
92% 33.2 MB/s
DQ Read 266
DQ Write 173
DQ Mixed 47.9
82% 162 MB/s
17GB free
Firmware: O1230C Max speed: SATA 3.0 600 MB/s
Read 473
Write 222
Mixed 249
69% 315 MB/s
4K Read 22.9
4K Write 51.1
4K Mixed 20.9
88% 31.6 MB/s
DQ Read 263
DQ Write 131
DQ Mixed 50.1
76% 148 MB/s
67GB free
Firmware: O1230C Max speed: SATA 3.0 600 MB/s
Read 358
Write 176
Mixed 195
53% 243 MB/s
4K Read 16.3
4K Write 24.1
4K Mixed 9.27
49% 16.6 MB/s
DQ Read 24.7
DQ Write 106
DQ Mixed 30.5
34% 53.6 MB/s
8,862 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 6,460,241 SSDs tested.


Approx. $40 @ launch in Sep '15
AmazonUS $403 days
OutletPCUS $685 hrs
EbayUS $904 mins
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Typical Premier SP550 120GB Builds (Compare 2,501 builds) See popular component choices, score breakdowns and rankings.
Gaming 63%
Desktop 66%
Battle cruiser
Workstation 52%

Motherboard: Asus H170-PRO - $105

EDIT WITH CUSTOM PC BUILDER Value: 83% - Excellent Total price: $660

Popular Premier SP550 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 (UBM).
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write and mixed IO.
  • - Checks include: 4k Align, NCQ, TRIM, SATA, USB & S.M.A.R.T.
  • - 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 highest voted in class.
  • - Find the best upgrades.
  • - Share your opinion by voting.
Solid State Drive Rankings (Price vs Performance) April 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 - Sometimes benchmarks get it completely wrong...
  • Fastest real world speed - Real World Speed measures performance for typical consumers.
  • Best value for money - Value for money is based on real world performance, price and capacity.
  • Raw speed comparison - Raw speed readings.
  • Details ordered by value - Detailed performance stats ordered by overall value for money.


Controller: Silicon Motion SM2256. Flash Memory: SK Hynix 16nm TLC.

Faster and bigger, your superior upgrade solution....

Added 22 months ago.

921 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 $330Nvidia GTX 1070 $447Samsung 850 Evo 250GB $90
Intel Core i7-7700K $290Nvidia GTX 1060-6GB $300Samsung 850 Evo 500GB $136
AMD Ryzen 5 1600 $176AMD RX 480 $350Samsung 850 Pro 256GB $163
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $183SanDisk Extreme 64GB $70
Seagate Barracuda 3TB (2016) $75G.SKILL Trident Z DDR4 3200 C14 4x16GB $957SanDisk Extreme 32GB $46
Seagate Barracuda 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $193SanDisk Ultra Fit 32GB $12
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