Average Bench: 79.3% (437th of 1011)

Based on 18,610 user benchmarks.  Models: ADATA SP550, ADATA SP 550, ADAT SP550

Good average bench

The Adata Premier SP550 240GB averaged 20.6% 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 210MB/s
Avg. 4K Random Mixed IO Speed 39.8MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the Adata Premier SP550 240GB is 38.5%. 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 92MB/s
Avg. Sequential Mixed IO Speed 344MB/s

Average Bench

(Based on 18,610 samples)
Min Avg Max
375 Read 466 507
56.5 Write 369 454
123 Mixed 344 404
71.9 SusWrite 92 118
70.8% 318 MB/s
Min Avg Max
19.7 4K Read 29 37.7
30.3 4K Write 79.9 115
21.5 4K Mixed 39.8 51.3
137% 49.6 MB/s
Min Avg Max
204 DQ Read 288 338
69.5 DQ Write 273 340
74.1 DQ Mixed 210 254
177% 257 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
27GB free (System drive)
Firmware: O1203AB
SusWrite @10s intervals: 161 129 46 55 55 39 MB/s
Read 487
Write 444
Mixed 399
SusWrite 80.8
79% 353 MB/s
4K Read 33
4K Write 110
4K Mixed 49.5
172% 64.3 MB/s
DQ Read 321
DQ Write 333
DQ Mixed 251
210% 302 MB/s
76GB free (System drive)
Firmware: P0121AA
SusWrite @10s intervals: 94 163 53 53 53 52 MB/s
Read 443
Write 53.8
Mixed 283
SusWrite 78.1
47% 214 MB/s
4K Read 25.2
4K Write 92.8
4K Mixed 45.8
146% 54.6 MB/s
DQ Read 320
DQ Write 303
DQ Mixed 81.6
124% 235 MB/s
18,610 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 18,503,719 SSDs tested.


Approx. $60 @ launch in Sep '15
BHPhotoUS $742 years
AmazonUS $803 months
Send price feedback
Typical Premier SP550 240GB Builds (Compare 21,707 builds) See popular component choices, score breakdowns and rankings.
Gaming 73%
Desktop 74%
Workstation 54%

Motherboard: Asus Z170-A - $350

EDIT WITH CUSTOM PC BUILDER Value: 61% - Good Total price: $1,128

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 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 3 years ago.

Excellent (edit your comment) Add link

15 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.

1011 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 i5-9400F $145Nvidia GTX 1660 $210Samsung 850 Evo 250GB $73
Intel Core i5-9600K $240Nvidia GTX 1660-Ti $270Samsung 850 Evo 500GB $107
Intel Core i7-9700K $350Nvidia RTX 2060 $349Samsung 850 Pro 256GB $200
Seagate Barracuda 1TB (2016) $40Corsair Vengeance LPX DDR4 3000 C15 2x8GB $65SanDisk Extreme 64GB $88
Seagate Barracuda 3TB (2016) $78G.SKILL Trident Z DDR4 3200 C14 4x16GB $612SanDisk Extreme 32GB $48
WD Blue 1TB (2012) $37Corsair Vengeance LPX DDR4 3200 C16 2x8GB $70SanDisk Ultra Fit 32GB $14
Today's hottest deals
About  •  User Guide  •  FAQs  •  Email  •  Privacy  •  Developer Feedback