Average Bench: 78.2% (351st of 956)

Based on 11,095 user benchmarks.  Models: ADATA SP550, ADATA SP 550, ADAT SP550

Good average bench

The Adata Premier SP550 240GB averaged 21.8% 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 204MB/s
Avg. 4K Random Mixed IO Speed 39.4MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the Adata Premier SP550 240GB is 39.8%. 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 92.3MB/s
Avg. Sequential Mixed IO Speed 339MB/s

Average Bench

(Based on 11,095 samples)
Min Avg Max
354 Read 460 507
77.9 Write 368 455
124 Mixed 339 406
73.3 SusWrite 92.3 118
70.2% 315 MB/s
Min Avg Max
18.5 4K Read 28.3 35.3
32.4 4K Write 80.1 117
22.2 4K Mixed 39.4 51
136% 49.3 MB/s
Min Avg Max
33.4 DQ Read 274 335
70.6 DQ Write 263 339
46.7 DQ Mixed 204 253
171% 247 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
62GB free (System drive)
Firmware: O0803B5a
SusWrite @10s intervals: 258 87 86 79 60 80 MB/s
Read 517
Write 424
Mixed 380
SusWrite 108
80% 357 MB/s
4K Read 30.8
4K Write 113
4K Mixed 46.9
167% 63.7 MB/s
DQ Read 335
DQ Write 319
DQ Mixed 254
211% 303 MB/s
74GB free (System drive)
Firmware: O0730A
SusWrite @10s intervals: 241 104 79 86 78 84 MB/s
Read 475
Write 427
Mixed 300
SusWrite 112
73% 328 MB/s
4K Read 21.2
4K Write 81.2
4K Mixed 40.9
128% 47.8 MB/s
DQ Read 292
DQ Write 323
DQ Mixed 250
204% 288 MB/s
155GB free (System drive)
Firmware: O1203AB
SusWrite @10s intervals: 244 59 53 55 54 54 MB/s
Read 456
Write 418
Mixed 372
SusWrite 86.3
74% 333 MB/s
4K Read 25.5
4K Write 74
4K Mixed 34
121% 44.5 MB/s
DQ Read 293
DQ Write 317
DQ Mixed 240
198% 283 MB/s
11,095 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 7,979,188 SSDs tested.


Approx. $60 @ launch in Sep '15
AmazonUS $664 months
BHPhotoUS $7421 months
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Typical Premier SP550 240GB Builds (Compare 22,834 builds) See popular component choices, score breakdowns and rankings.
Gaming 91%
Nuclear submarine
Desktop 80%
Workstation 62%

Motherboard: Asus Z170 PRO GAMING - $157

EDIT WITH CUSTOM PC BUILDER Value: 91% - Outstanding Total price: $1,065

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

Faster and bigger, your superior upgrade solution...

Added 2 years ago.

Excellent (edit your comment) Add link

1 month ago.

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


22 months ago.

Really fast SSD for a good price.

956 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 $356Nvidia GTX 1070 $380Samsung 850 Evo 250GB $70
AMD Ryzen 5 1600 $150Nvidia GTX 1060-6GB $240Samsung 850 Evo 500GB $120
Intel Core i5-8600K $249AMD RX 480 $280Samsung 850 Pro 256GB $163
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $155SanDisk Extreme 64GB $80
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $901SanDisk Extreme 32GB $30
WD Blue 1TB (2012) $39Corsair Vengeance LPX DDR4 3200 C16 2x8GB $175SanDisk Ultra Fit 32GB $12
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