Average Bench: 79% (488th of 1058)

Based on 14,256 user benchmarks.  Model: SK hynix SC311 SATA 256GB

Good average bench

The SK hynix SC311 SATA 256GB averaged 21.0% 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 293MB/s
Avg. 4K-64Thread Write Speed 294MB/s

Average consistency

The range of scores (95th - 5th percentile) for the SK hynix SC311 SATA 256GB is 40.6%. 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 220MB/s
Avg. Sequential Mixed IO Speed 362MB/s

Average Bench

(Based on 14,256 samples)
Min Avg Max
337 Read 434 496
269 Write 388 463
278 Mixed 362 416
132 SusWrite 220 267
78.7% 351 MB/s
Min Avg Max
9.9 4K Read 23.7 31.3
28.9 4K Write 61.2 92
15.6 4K Mixed 32.9 44.1
110% 39.2 MB/s
Min Avg Max
179 DQ Read 329 362
142 DQ Write 294 351
142 DQ Mixed 293 329
225% 305 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
210GB free (System drive)
Firmware: 70000P10
SusWrite @10s intervals: 410 244 238 241 241 242 MB/s
Read 451
Write 411
Mixed 380
SusWrite 269
85% 378 MB/s
4K Read 28.2
4K Write 103
4K Mixed 42.6
152% 58.1 MB/s
DQ Read 364
DQ Write 339
DQ Mixed 323
250% 342 MB/s
124GB free (System drive)
Firmware: 0P10
SusWrite @10s intervals: 412 224 238 214 219 227 MB/s
Read 407
Write 344
Mixed 375
SusWrite 256
78% 345 MB/s
4K Read 28.9
4K Write 85.8
4K Mixed 38.5
139% 51.1 MB/s
DQ Read 359
DQ Write 326
DQ Mixed 325
249% 337 MB/s
114GB free (System drive)
Firmware: 70000P10
SusWrite @10s intervals: 259 271 221 212 209 217 MB/s
Read 458
Write 422
Mixed 387
SusWrite 231
84% 374 MB/s
4K Read 27.2
4K Write 68.3
4K Mixed 37.6
126% 44.4 MB/s
DQ Read 358
DQ Write 325
DQ Mixed 325
248% 336 MB/s
14,256 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 43,080,794 SSDs tested.

Typical hynix SC311 SATA 256GB Builds (Compare 3,870 builds) See popular component choices, score breakdowns and rankings.
Gaming 11%
Tree trunk
Desktop 71%
Workstation 11%
Tree trunk

System: Dell G5 5587


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.
  • - 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.
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Solid State Drive Rankings (Price vs Performance) May 2021 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.


1058 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

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Intel Core i5-10600K $210Nvidia RTX 3080 $700Samsung 860 Evo 250GB $50
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WD Blue 1TB (2012) $30Corsair Vengeance LPX DDR4 3000 C15 2x8GB $102SanDisk Extreme 32GB $28
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $649SanDisk Ultra Fit 32GB $16
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