Average Bench: 79.3% (403rd of 992)

Based on 13,760 user benchmarks.  Models: ADATA SP550, ADATA SP 550, ADAT SP550

Good average bench

The Adata Premier SP550 240GB averaged 20.7% 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 209MB/s
Avg. 4K Random Mixed IO Speed 40.1MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the Adata Premier SP550 240GB is 39.1%. 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 91.8MB/s
Avg. Sequential Mixed IO Speed 348MB/s

Average Bench

(Based on 13,760 samples)
Min Avg Max
366 Read 464 507
62.1 Write 372 452
139 Mixed 348 405
73.1 SusWrite 91.8 118
71% 319 MB/s
Min Avg Max
19.7 4K Read 28.7 35.8
34.2 4K Write 80.6 115
20 4K Mixed 40.1 50
138% 49.8 MB/s
Min Avg Max
126 DQ Read 283 339
82.8 DQ Write 274 340
44.5 DQ Mixed 209 255
176% 255 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
102GB free (System drive)
Firmware: O1203AB
SusWrite @10s intervals: 206 85 53 53 53 53 MB/s
Read 454
Write 427
Mixed 395
SusWrite 83.8
76% 340 MB/s
4K Read 29
4K Write 82.8
4K Mixed 39.7
139% 50.5 MB/s
DQ Read 321
DQ Write 289
DQ Mixed 248
202% 286 MB/s
92GB free (System drive)
Firmware: O1203AB
SusWrite @10s intervals: 64 100 117 52 53 52 MB/s
Read 478
Write 54.5
Mixed 323
SusWrite 73.1
51% 232 MB/s
4K Read 29.6
4K Write 86.9
4K Mixed 43
146% 53.2 MB/s
DQ Read 323
DQ Write 121
DQ Mixed 79.5
96% 175 MB/s
44GB free (System drive)
Firmware: P0330AA
SusWrite @10s intervals: 100 171 49 49 37 51 MB/s
Read 450
Write 54.2
Mixed 270
SusWrite 76.1
46% 213 MB/s
4K Read 27.2
4K Write 82.6
4K Mixed 35.6
130% 48.5 MB/s
DQ Read 313
DQ Write 321
DQ Mixed 242
202% 292 MB/s
13,760 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 12,966,448 SSDs tested.


Approx. $60 @ launch in Sep '15
AmazonUS $6611 months
BHPhotoUS $742 years
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Typical Premier SP550 240GB Builds (Compare 17,038 builds) See popular component choices, score breakdowns and rankings.
Gaming 92%
Nuclear submarine
Desktop 80%
Aircraft carrier
Workstation 62%

Motherboard: Asus Z170-A - $154

EDIT WITH CUSTOM PC BUILDER Value: 98% - Outstanding Total price: $991

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) March 2019 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

8 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.

992 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 $364Samsung 850 Evo 250GB $75
AMD Ryzen 5 1600 $120Nvidia GTX 1060-6GB $230Samsung 850 Evo 500GB $105
Intel Core i5-8600K $260Nvidia GTX 1080-Ti $808Samsung 850 Pro 256GB $97
Seagate Barracuda 1TB (2016) $43Corsair Vengeance LPX DDR4 3000 C15 2x8GB $105SanDisk Extreme 64GB $43
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $761SanDisk Extreme 32GB $48
WD Blue 1TB (2012) $45Corsair Vengeance LPX DDR4 3200 C16 2x8GB $110SanDisk Ultra Fit 32GB $12
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