Average Bench: 79.1% (445th of 1016)

Based on 18,138 user benchmarks.  Models: ADATA SP550, ADATA SP 550, ADAT SP550

Good average bench

The Adata Premier SP550 240GB averaged 20.8% lower than the peak scores attained by the group leaders. This is an excellent result which ranks the Adata Premier SP550 240GB near the top of the comparison list.


Avg. 4K-64Thread Mixed IO Speed 203MB/s
Avg. 4K Random Mixed IO Speed 40.3MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the Adata Premier SP550 240GB is 39.5%. This is a relatively wide range which indicates that the Adata Premier SP550 240GB performs inconsistently under varying real world conditions.


Avg. Sustained Write Speed 91.4MB/s
Avg. Sequential Mixed IO Speed 344MB/s

Average Bench

(Based on 18,138 samples)
Min Avg Max
346 Read 463 508
57.8 Write 373 456
134 Mixed 344 404
69.7 SusWrite 91.4 119
70.8% 318 MB/s
Min Avg Max
20.8 4K Read 29.2 38.5
28.9 4K Write 79.8 116
21.2 4K Mixed 40.3 52.8
138% 49.8 MB/s
Min Avg Max
32.4 DQ Read 275 335
75 DQ Write 268 341
45.1 DQ Mixed 203 254
171% 249 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
88GB free (System drive)
Firmware: O0803B5a
SusWrite @10s intervals: 242 84 75 83 82 87 MB/s
Read 499
Write 443
Mixed 373
SusWrite 109
80% 356 MB/s
4K Read 42.9
4K Write 102
4K Mixed 57.1
192% 67.4 MB/s
DQ Read 308
DQ Write 321
DQ Mixed 261
211% 297 MB/s
114GB free (System drive)
Firmware: P0705AB
SusWrite @10s intervals: 155 139 55 55 55 55 MB/s
Read 498
Write 403
Mixed 404
SusWrite 85.4
78% 348 MB/s
4K Read 32.4
4K Write 97.2
4K Mixed 45.3
159% 58.3 MB/s
DQ Read 307
DQ Write 338
DQ Mixed 246
206% 297 MB/s
49GB free (System drive)
Firmware: P0330AA
SusWrite @10s intervals: 55 78 50 93 52 53 MB/s
Read 481
Write 88.7
Mixed 95.8
SusWrite 63.6
39% 182 MB/s
4K Read 29.3
4K Write 33.1
4K Mixed 30.6
101% 31 MB/s
DQ Read 34.4
DQ Write 38.5
DQ Mixed 35.1
27% 36 MB/s
18,138 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 21,681,288 SSDs tested.


Approx. $60 @ launch in Sep '15
BHPhotoUS $743 years
AmazonUS $806 months
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Typical Premier SP550 240GB Builds (Compare 24,150 builds) See popular component choices, score breakdowns and rankings.
Gaming 74%
Desktop 75%
Workstation 54%

Motherboard: Asus Z170-A - $350

EDIT WITH CUSTOM PC BUILDER Value: 64% - Good Total price: $1,104

Popular Premier SP550 240GB 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) January 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: Silicon Motion SM2256. Flash Memory: SK Hynix 16nm TLC

Faster and bigger, your superior upgrade solution...

Added 3 years ago.

Excellent (edit your comment) Add link

19 months ago.

if corrupted , website offers a tool to fix it for free unlike sandisk products


3 years ago.

Really fast SSD for a good price.

1016 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 $218Nvidia GTX 1660S (Super) $240Crucial MX500 250GB $43
Intel Core i5-9400F $155Nvidia GTX 1650S (Super) $170Samsung 850 Evo 120GB $78
Intel Core i7-9700K $370Nvidia RTX 2060 $340Samsung 850 Pro 512GB $204
Seagate Barracuda 1TB (2016) $37Corsair Vengeance LPX DDR4 3200 C16 2x8GB $73SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $40Corsair Vengeance LPX DDR4 3000 C15 2x8GB $63SanDisk Extreme 32GB $46
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $643SanDisk Ultra Fit 32GB $16
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