Average Bench: 72.9% (434th of 956)

Based on 2,456 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]


Good average bench

The Adata XPG SX900 256GB averaged 27.0% 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-64Thread Mixed IO Speed 115MB/s
Avg. 4K Random Write Speed 81.4MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the Adata XPG SX900 256GB is 32.5%. This is a relatively narrow range which indicates that the Adata XPG SX900 256GB performs reasonably consistently under varying real world conditions.


Avg. Sustained Write Speed 184MB/s
Avg. Sequential Write Speed 244MB/s

Average Bench

(Based on 2,456 samples)
Min Avg Max
307 Read 421 511
189 Write 244 285
221 Mixed 281 340
128 SusWrite 184 227
62.9% 283 MB/s
Min Avg Max
17.3 4K Read 25.9 33.4
39.2 4K Write 81.4 111
10.2 4K Mixed 25.3 42.3
115% 44.2 MB/s
Min Avg Max
23.5 DQ Read 194 289
74.9 DQ Write 197 257
9.62 DQ Mixed 115 246
109% 169 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
183GB free
Firmware: 5.0.2a
SusWrite @10s intervals: 198 217 239 241 213 219 MB/s
Read 388
Write 287
Mixed 284
SusWrite 221
66% 295 MB/s
4K Read 31.8
4K Write 93.4
4K Mixed 42
151% 55.7 MB/s
DQ Read 300
DQ Write 263
DQ Mixed 255
198% 273 MB/s
77GB free (System drive)
Firmware: 5.0.2a
SusWrite @10s intervals: 169 173 171 169 165 164 MB/s
Read 379
Write 257
Mixed 269
SusWrite 168
60% 268 MB/s
4K Read 28
4K Write 75.4
4K Mixed 35
127% 46.1 MB/s
DQ Read 281
DQ Write 212
DQ Mixed 236
180% 243 MB/s
147GB free (System drive)
Firmware: 5.2.5
SusWrite @10s intervals: 205 194 209 206 203 203 MB/s
Read 384
Write 262
Mixed 293
SusWrite 203
64% 286 MB/s
4K Read 28.6
4K Write 52.6
4K Mixed 34.5
115% 38.6 MB/s
DQ Read 247
DQ Write 259
DQ Mixed 252
190% 253 MB/s
78GB free (System drive)
Firmware: 5.6.0
SusWrite @10s intervals: 168 142 135 127 128 178 MB/s
Read 354
Write 290
Mixed 264
SusWrite 146
59% 264 MB/s
4K Read 25.8
4K Write 96
4K Mixed 30.8
129% 50.9 MB/s
DQ Read 235
DQ Write 209
DQ Mixed 223
167% 222 MB/s
2,456 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 8,569,795 SSDs tested.


Approx. $188 @ launch in Mar '12
AmazonUS $1648 months
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Typical XPG SX900 256GB Builds (Compare 10,436 builds) See popular component choices, score breakdowns and rankings.
Gaming 53%
Desktop 49%
Workstation 38%
Jet ski

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

EDIT WITH CUSTOM PC BUILDER Value: 66% - Good Total price: $674

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.
  • - 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.
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  • - Share your opinion by voting.
Solid State Drive Rankings (Price vs Performance) September 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: LSI SandForce SF2281VB1-SDC. Flash Memory: Intel Micron Synchronous 25nm MLC

Breaking through the limits...

Added 4 years ago.


18 months ago.

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

Below average

4 years ago.

Review  tweakers.net/...

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

Jan '13 AS SSD Benchmark Scores

956 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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Intel Core i5-8600K $260AMD RX 480 $280Samsung 850 Pro 256GB $163
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WD Blue 1TB (2012) $39Corsair Vengeance LPX DDR4 3200 C16 2x8GB $167SanDisk Ultra Fit 32GB $11
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