Average Bench: 69.6% - 316th / 836

Based on 1,178 user benchmarks.  Models: ADATA SX900, ADATA SX 900, ADAT SX900, ADATA SSD SX900 256GB-, ADATA SSD SX900 256GB-DL2-TCG

The SX900 and SX910 are both Sandforce 2881 based SSDs from Adata. The only difference between them is their warranty period: 5 years for the SX910 vs 3 years for the SX900. Both drives utilize Intel-Micron 25Nm MLC so the differences must be at a "sub-atomic" level, or at least beyond the scope of the specs. Once again as with all Sandforce 2881 based drives performance is skewed in favour of reads over writes. With a peak sequential read of 510 MB/s and corresponding sequential write of 309 MB/s the SX series does not break any records but, like all SSDs, they do offer speeds way in excess of mechanical hard drives. Overall performance lags the SSD group leaders by around 40% and there are far faster, cheaper and newer (non-Sandforce) alternatives such as the Samsung 840 Evo or the Sandisk Ultra Plus available. [Jan '14 SSDrivePro]


Above average average bench

The Adata XPG SX900 256GB averaged 30.4% lower than the peak scores attained by the group leaders. This isn't a great result which indicates that there are much faster alternatives on the comparison list.


Avg. 4K Random Write Speed 78.6MB/s
Avg. 4K Random Read Speed 25.1MB/s
See where your SSD ranks →

Above average consistency

The range of scores (95th - 5th percentile) for the Adata XPG SX900 256GB is 34.3%. This is a relatively narrow range which indicates that the Adata XPG SX900 256GB performs reasonably consistently under varying real world conditions.


Avg. Sequential Write Speed 237MB/s
Avg. 4K Random Mixed IO Speed 15.4MB/s

Average Bench

(Based on 1,178 samples)
Min Avg Max
348 Read 468 512
186 Write 237 278
212 Mixed 292 344
73.3% 333 MB/s
Min Avg Max
16.1 4K Read 25.1 33.5
37.4 4K Write 78.6 119
9.72 4K Mixed 15.4 21.9
99.4% 39.7 MB/s
Min Avg Max
22.4 DQ Read 164 283
59.5 DQ Write 176 258
9.4 DQ Mixed 48 82
69.7% 129 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
237GB free
Firmware: 5.2.5 Max speed: SATA 3.0 600 MB/s
Read 494
Write 248
Mixed 278
75% 340 MB/s
4K Read 30.9
4K Write 116
4K Mixed 22.6
137% 56.5 MB/s
DQ Read 269
DQ Write 244
DQ Mixed 74.3
106% 196 MB/s
224GB free
Firmware: 5.0.7a Max speed: SATA 3.0 600 MB/s
Read 483
Write 257
Mixed 318
78% 353 MB/s
4K Read 30.1
4K Write 103
4K Mixed 19
125% 50.8 MB/s
DQ Read 281
DQ Write 243
DQ Mixed 59
100% 194 MB/s
1GB free
Firmware: 5.0.7b Max speed: SATA 3.0 600 MB/s
Read 431
Write 193
Mixed 237
63% 287 MB/s
4K Read 26.5
4K Write 65.5
4K Mixed 7.88
85% 33.3 MB/s
DQ Read 233
DQ Write 171
DQ Mixed 35.9
72% 147 MB/s
51GB free
Firmware: 5.8.2 Max speed: SATA 3.0 600 MB/s
Read 463
Write 259
Mixed 243
71% 322 MB/s
4K Read 20.8
4K Write 68.1
4K Mixed 10.1
80% 33 MB/s
DQ Read 20.7
DQ Write 162
DQ Mixed 10.7
32% 64.4 MB/s
198GB free
Firmware: 5.0.7b Max speed: SATA 3.0 600 MB/s
Read 365
Write 233
Mixed 277
65% 292 MB/s
4K Read 15
4K Write 73.7
4K Mixed 10.2
75% 33 MB/s
DQ Read 20.2
DQ Write 70.4
DQ Mixed 10.2
18% 33.6 MB/s

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 2,122,423 SSDs tested.


NeweggUS $94.9916 months ago.
AmazonUS $186.312 months ago.
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Typical XPG SX900 256GB Builds (Compare 4,570 builds) See popular component choices, score breakdowns and rankings.
Gaming 71%
Desktop 53%
Workstation 41%
Speed boat

Motherboard: Gigabyte GA-990FXA-UD3 - $100

EDIT WITH CUSTOM PC BUILDER Value: 90% - Excellent Total price: $610

Popular XPG SX900 256GB 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 (UBM).
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write and mixed IO.
  • - Checks include: 4k Align, NCQ, TRIM, SATA, USB & S.M.A.R.T.
  • - 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 highest voted in class.
  • - Find the best upgrades.
  • - Share your opinion by voting.
Solid State Drive Rankings (Price vs Performance) February 2017 SSD Rankings.

Welcome to our consumer SSD comparison. We calculate effective speed based on real world performance then adjust by cost per GB to yield a value for money rating. Calculated values don't always tell the whole picture so we check them against thousands of individual user ratings. The customizable table below combines these factors and more to bring you the definitive list of top SSDs. Share your opinion by voting. [SSDrivePro]


Controller: LSI SandForce SF2281VB1-SDC. Flash Memory: Intel Micron Synchronous 25nm MLC.

Breaking through the limits...

Added 3 years ago.

Below average

3 years ago.

Review  tweakers.net/...

Image  tweakers.net/...
Jan '13 AS SSD Benchmark Scores

Jan '13 AS SSD Benchmark Scores


1 month ago.

Not stable, numerous crashes (Win7x64Pro), failure to write crash dumps, etc. Customer support very poor as well.


1 month ago.

Thanks - Good !!!

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836 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

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