Average Bench: 77.2% (464th of 1011)

Based on 10,241 user benchmarks.  Models: ADAT SP550, ADATA SP550, ADATA SP 550

Good average bench

The Adata Premier SP550 120GB averaged 22.8% lower than the peak scores attained by the group leaders. This is an excellent result which ranks the Adata Premier SP550 120GB near the top of the comparison list.


Avg. 4K-64Thread Mixed IO Speed 196MB/s
Avg. 4K Random Mixed IO Speed 37.7MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the Adata Premier SP550 120GB is 38.8%. This is a relatively wide range which indicates that the Adata Premier SP550 120GB performs inconsistently under varying real world conditions.


Avg. Sustained Write Speed 91.7MB/s
Avg. Sequential Mixed IO Speed 332MB/s

Average Bench

(Based on 10,241 samples)
Min Avg Max
372 Read 466 510
277 Write 361 421
175 Mixed 332 392
85.8 SusWrite 91.7 100
69.6% 313 MB/s
Min Avg Max
19.4 4K Read 28.1 37.2
30 4K Write 80.2 120
18.3 4K Mixed 37.7 51.4
133% 48.7 MB/s
Min Avg Max
44.4 DQ Read 266 334
87.8 DQ Write 259 328
47.3 DQ Mixed 196 262
165% 240 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
60GB free (System drive)
Firmware: O0803B5a
SusWrite @10s intervals: 276 68 65 65 64 65 MB/s
Read 462
Write 404
Mixed 371
SusWrite 100
75% 334 MB/s
4K Read 43.2
4K Write 107
4K Mixed 58.6
197% 69.7 MB/s
DQ Read 352
DQ Write 317
DQ Mixed 274
222% 315 MB/s
58GB free (System drive)
Firmware: O1230C
SusWrite @10s intervals: 218 110 54 58 55 56 MB/s
Read 490
Write 362
Mixed 352
SusWrite 91.8
72% 324 MB/s
4K Read 24.4
4K Write 88.3
4K Mixed 40
135% 50.9 MB/s
DQ Read 282
DQ Write 311
DQ Mixed 234
194% 276 MB/s
10,241 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 16,818,249 SSDs tested.


Approx. $40 @ launch in Sep '15
EbayUS $427 hrs
OutletPCUS $6018 hrs
AmazonUS $906 mins
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Typical Premier SP550 120GB Builds (Compare 4,325 builds) See popular component choices, score breakdowns and rankings.
Gaming 61%
Desktop 64%
Workstation 47%

Motherboard: Asus H170-PRO - $105

EDIT WITH CUSTOM PC BUILDER Value: 69% - Good Total price: $616

Popular Premier SP550 120GB 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 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.

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 $143AMD RX 580 $172Samsung 850 Evo 250GB $86
AMD Ryzen 5 3600 $198Nvidia GTX 1660 $220Samsung 850 Evo 500GB $103
Intel Core i5-9600K $219AMD RX Vega 56 $300Samsung 850 Pro 256GB $195
Seagate Barracuda 1TB (2016) $40Corsair Vengeance LPX DDR4 3000 C15 2x8GB $75SanDisk Extreme 64GB $128
WD Blue 1TB (2012) $40G.SKILL Trident Z DDR4 3200 C14 4x16GB $695SanDisk Extreme 32GB $48
Seagate Barracuda 3TB (2016) $80Corsair Vengeance LPX DDR4 3200 C16 2x8GB $80SanDisk Extreme 16GB $24
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