Average Bench: 78.1% (371st of 959)

Based on 11,076 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 198MB/s
Avg. 4K Random Mixed IO Speed 39.7MB/s

Average consistency

The range of scores (95th - 5th percentile) for the Adata Premier SP550 240GB is 41.5%. 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 91.5MB/s
Avg. Sequential Mixed IO Speed 342MB/s

Average Bench

(Based on 11,076 samples)
Min Avg Max
349 Read 463 510
61.8 Write 369 456
131 Mixed 342 406
71.2 SusWrite 91.5 117
70.5% 317 MB/s
Min Avg Max
19.2 4K Read 28.7 36
32.8 4K Write 78.6 116
21.4 4K Mixed 39.7 51.8
136% 49 MB/s
Min Avg Max
32.2 DQ Read 271 334
51.5 DQ Write 257 339
41.9 DQ Mixed 198 255
167% 242 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
53GB free
Firmware: O1203AB
SusWrite @10s intervals: 266 55 55 55 55 55 MB/s
Read 333
Write 308
Mixed 72.7
SusWrite 89.8
44% 201 MB/s
4K Read 31
4K Write 113
4K Mixed 50.1
171% 64.8 MB/s
DQ Read 316
DQ Write 332
DQ Mixed 247
207% 298 MB/s
165GB free (System drive)
Firmware: O1230C
SusWrite @10s intervals: 245 87 60 71 80 80 MB/s
Read 494
Write 450
Mixed 381
SusWrite 104
80% 357 MB/s
4K Read 27.6
4K Write 80.7
4K Mixed 39.7
135% 49.3 MB/s
DQ Read 26.9
DQ Write 327
DQ Mixed 37.9
71% 131 MB/s
11,076 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 9,117,614 SSDs tested.


Approx. $60 @ launch in Sep '15
AmazonUS $666 months
BHPhotoUS $7423 months
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Typical Premier SP550 240GB Builds (Compare 15,236 builds) See popular component choices, score breakdowns and rankings.
Gaming 59%
Desktop 51%
Workstation 43%
Speed boat

Motherboard: MSI 970 GAMING (MS-7693) - $102

EDIT WITH CUSTOM PC BUILDER Value: 92% - Outstanding Total price: $499

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) October 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

3 months ago.

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


2 years ago.

Really fast SSD for a good price.

959 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 $370Nvidia GTX 1070 $350Samsung 850 Evo 250GB $100
AMD Ryzen 5 1600 $155Nvidia GTX 1060-6GB $249Samsung 850 Evo 500GB $98
Intel Core i7-7700K $355AMD RX 480 $280Samsung 850 Pro 256GB $163
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $140SanDisk Extreme 64GB $42
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $869SanDisk Extreme 32GB $30
Seagate Barracuda 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $157SanDisk Ultra Fit 32GB $12
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