Average Bench: 78.5% (410th of 991)

Based on 5,256 user benchmarks.  Model: SK hynix SC311 SATA 256GB

Good average bench

The SK hynix SC311 SATA 256GB averaged 21.5% lower than the peak scores attained by the group leaders. This is an excellent result which ranks the SK hynix SC311 SATA 256GB near the top of the comparison list.


Avg. 4K-64Thread Mixed IO Speed 291MB/s
Avg. 4K-64Thread Write Speed 295MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the SK hynix SC311 SATA 256GB is 39.7%. This is a relatively wide range which indicates that the SK hynix SC311 SATA 256GB performs inconsistently under varying real world conditions.


Avg. Sustained Write Speed 234MB/s
Avg. Sequential Mixed IO Speed 357MB/s

Average Bench

(Based on 5,256 samples)
Min Avg Max
349 Read 434 494
266 Write 377 459
276 Mixed 357 414
158 SusWrite 234 264
78.7% 351 MB/s
Min Avg Max
10.6 4K Read 22.8 31.1
24.4 4K Write 58.7 88
13.3 4K Mixed 31.9 43.5
106% 37.8 MB/s
Min Avg Max
31.4 DQ Read 321 362
161 DQ Write 295 343
44.2 DQ Mixed 291 329
223% 302 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
183GB free (System drive)
Firmware: 70000P10
SusWrite @10s intervals: 381 248 211 225 219 231 MB/s
Read 475
Write 411
Mixed 388
SusWrite 252
86% 382 MB/s
4K Read 28.3
4K Write 68.3
4K Mixed 37.8
128% 44.8 MB/s
DQ Read 356
DQ Write 302
DQ Mixed 319
242% 326 MB/s
54GB free (System drive)
Firmware: 70000P10
SusWrite @10s intervals: 277 228 182 178 172 179 MB/s
Read 485
Write 398
Mixed 374
SusWrite 203
82% 365 MB/s
4K Read 28.9
4K Write 75.4
4K Mixed 39.5
134% 47.9 MB/s
DQ Read 345
DQ Write 308
DQ Mixed 326
245% 327 MB/s
5,256 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 12,288,474 SSDs tested.

Typical hynix SC311 SATA 256GB Builds (Compare 3,858 builds) See popular component choices, score breakdowns and rankings.
Gaming 57%
Desktop 72%
Workstation 68%
Battle cruiser

System: Dell Inspiron 5675

EDIT WITH CUSTOM PC BUILDER Value: 106% - Outstanding Total price: $180

Popular hynix SC311 SATA 256GB systems:

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.

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How it works

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  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
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  • - RAM tests include: single/multi core bandwidth and latency.
  • - Reports are generated and presented on userbenchmark.com.
  • - Identify the strongest components in your PC.
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Solid State Drive Rankings (Price vs Performance) February 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.


991 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 $357Samsung 850 Evo 250GB $90
AMD Ryzen 5 1600 $139Nvidia GTX 1060-6GB $220Samsung 850 Evo 500GB $110
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 $939SanDisk Extreme 32GB $48
WD Blue 1TB (2012) $45Corsair Vengeance LPX DDR4 3200 C16 2x8GB $120SanDisk Ultra Fit 32GB $12
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