TEST
YOUR USB

JMicron (ExtHD)

Tech 256GB

▲ 500 ▼

Release date ≈ Q2 2016.

Average Bench: 174% (1st of 639)

Based on 49 user benchmarks.  Device: VID 152d PID 0578 Model: JMicron Tech
Poor: 54%Average: 174% Great: 354%

Outstanding average bench

The JMicron Tech 256GB averaged 74.5% higher than the peak scores attained by the group leaders. This is an excellent result which ranks the JMicron Tech 256GB near the top of the comparison list.

Strengths

Avg. 4K-64Thread Write Speed 38.4MB/s
Avg. 4K Random Write Speed 28MB/s

Terrible consistency

The range of scores (95th - 5th percentile) for the JMicron Tech 256GB is 300%. This is a particularly wide range which indicates that the JMicron Tech 256GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sequential Read Speed 258MB/s
Avg. 4K Random Read Speed 19.1MB/s
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Average Bench

(Based on 49 samples)
Rank 1174%
Min Avg Max
23.5 Read 258 411
22.5 Write 245 408
22.6 Mixed 217 355
23.8 SusWrite 213 382
314% 233 MB/s
Min Avg Max
2.3 4K Read 19.1 28.8
3 4K Write 28 72
3.4 4K Mixed 17.7 39
1,626% 21.6 MB/s
Min Avg Max
13 DQ Read 20.2 30.2
16.7 DQ Write 38.4 87.9
11.3 DQ Mixed 21.1 41.5
2,101% 26.6 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest USB (mainstream) averages a speed of 100%
85GB free, PID 0578
Operating at USB 3.0 Speed
SusWrite @10s intervals: 381 196 198 233 245 244 MB/s
341% Outstanding
Read 397
Write 404
Mixed 351
SusWrite 249
469% 350 MB/s
4K Read 28.4
4K Write 72.5
4K Mixed 38.6
3,884% 46.5 MB/s
DQ Read 26.8
DQ Write 87.2
DQ Mixed 41.4
4,474% 51.8 MB/s
83GB free, PID 0578
Operating at USB 3.0 Speed
SusWrite @10s intervals: 382 267 244 246 243 246 MB/s
322% Outstanding
Read 395
Write 403
Mixed 352
SusWrite 271
478% 355 MB/s
4K Read 28
4K Write 64.9
4K Mixed 38.4
3,617% 43.8 MB/s
DQ Read 26.5
DQ Write 86.3
DQ Mixed 40.7
4,418% 51.2 MB/s
80GB free, PID 0578
Operating at USB 3.0 Speed
SusWrite @10s intervals: 385 253 245 244 245 244 MB/s
297% Outstanding
Read 392
Write 390
Mixed 347
SusWrite 269
470% 350 MB/s
4K Read 26.4
4K Write 57.1
4K Mixed 34.8
3,224% 39.4 MB/s
DQ Read 25.2
DQ Write 68.2
DQ Mixed 37.4
3,685% 43.6 MB/s
85GB free, PID 0578
Operating at USB 3.0 Speed
SusWrite @10s intervals: 393 223 195 229 243 250 MB/s
198% Outstanding
Read 399
Write 407
Mixed 356
SusWrite 256
476% 354 MB/s
4K Read 21.5
4K Write 25.7
4K Mixed 23.3
1,746% 23.5 MB/s
DQ Read 20.8
DQ Write 25.8
DQ Mixed 23.6
1,757% 23.4 MB/s
80GB free, PID 0578
Operating at USB 3.0 Speed
SusWrite @10s intervals: 349 273 245 245 243 245 MB/s
193% Outstanding
Read 346
Write 351
Mixed 312
SusWrite 267
431% 319 MB/s
4K Read 20.7
4K Write 25.9
4K Mixed 22.9
1,737% 23.2 MB/s
DQ Read 21.3
DQ Write 37.5
DQ Mixed 26.2
2,246% 28.3 MB/s
85GB free, PID 0578
Operating at USB 3.0 Speed
SusWrite @10s intervals: 178 320 246 242 242 235 MB/s
182% Outstanding
Read 370
Write 355
Mixed 322
SusWrite 244
432% 323 MB/s
4K Read 17.4
4K Write 23.3
4K Mixed 19.8
1,530% 20.2 MB/s
DQ Read 19.8
DQ Write 33.9
DQ Mixed 25.7
2,101% 26.5 MB/s
80GB free, PID 0578
Operating at USB 2.1 Speed
SusWrite @10s intervals: 43 42 42 42 42 42 MB/s
63.9% Good
Read 40.8
Write 41.5
Mixed 41
SusWrite 42
57% 41.3 MB/s
4K Read 14
4K Write 14.8
4K Mixed 14.1
1,035% 14.3 MB/s
DQ Read 14.6
DQ Write 20.6
DQ Mixed 17.9
1,364% 17.7 MB/s
49 MORE »
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  • Best user rated - User sentiment trumps benchmarks for this comparison.
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  • Fastest real world speed - Real World Speed measures performance for typical consumers.

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