TEST
YOUR USB

JMicron (ExtHD)

Generic 512GB

▲ 500 ▼

Release date ≈ Q3 2018.

Average Bench: 152% (1st of 639)

Based on 6 user benchmarks.  Device: VID 152d PID 0576 Model: JMicron Generic
Poor: 14%Average: 152% Great: 299%

Outstanding average bench

The JMicron Generic 512GB averaged 51.8% higher than the peak scores attained by the group leaders. This is an excellent result which ranks the JMicron Generic 512GB near the top of the comparison list.

Strengths

Avg. 4K-64Thread Write Speed 47.7MB/s
Avg. 4K Random Write Speed 26.9MB/s

Terrible consistency

The range of scores (95th - 5th percentile) for the JMicron Generic 512GB is 285%. This is a particularly wide range which indicates that the JMicron Generic 512GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. 4K Random Read Speed 11.4MB/s
Avg. Sequential Read Speed 209MB/s
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Average Bench

(Based on 6 samples)
Rank 1152%
Min Avg Max
25.3 Read 209 377
24.7 Write 174 306
24.8 Mixed 143 239
24.7 SusWrite 166 299
229% 173 MB/s
Min Avg Max
1.6 4K Read 11.4 19.1
1.5 4K Write 26.9 57
1.8 4K Mixed 7.35 18.9
1,206% 15.2 MB/s
Min Avg Max
14.3 DQ Read 19.3 23.3
31 DQ Write 47.7 69.4
6.3 DQ Mixed 11.6 24.5
2,088% 26.2 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest USB (mainstream) averages a speed of 100%
477GB free, PID 0576
Operating at USB 3.1 Speed
SusWrite @10s intervals: 247 248 248 250 250 248 MB/s
282% Outstanding
Read 336
Write 228
Mixed 186
SusWrite 248
322% 250 MB/s
4K Read 19.1
4K Write 56.7
4K Mixed 6.7
2,227% 27.5 MB/s
DQ Read 23.3
DQ Write 69.4
DQ Mixed 7
2,685% 33.2 MB/s
465GB free (System drive), PID 0576
Operating at USB 3.1 Speed
SusWrite @10s intervals: 283 288 291 252 290 288 MB/s
174% Outstanding
Read 288
Write 296
Mixed 239
SusWrite 282
376% 276 MB/s
4K Read 17.4
4K Write 21.7
4K Mixed 18.9
1,446% 19.3 MB/s
DQ Read 21.1
DQ Write 31
DQ Mixed 24.5
1,966% 25.5 MB/s
431GB free, PID 0576
Operating at USB 3.1 Speed
SusWrite @10s intervals: 102 120 128 117 116 114 MB/s
109% Outstanding
Read 198
Write 163
Mixed 144
SusWrite 116
203% 156 MB/s
4K Read 4.9
4K Write 17.6
4K Mixed 3.7
743% 8.73 MB/s
DQ Read 14.3
DQ Write 38
DQ Mixed 6.3
1,560% 19.5 MB/s
219GB free, PID 0576
Operating at USB 2.1 Speed
SusWrite @10s intervals: 28 27 28 27 27 27 MB/s
32.5% Below average
Read 32.3
Write 28
Mixed 29.5
SusWrite 27.3
40% 29.3 MB/s
4K Read 6.5
4K Write 6.6
4K Mixed 5.5
436% 6.2 MB/s
263GB free, PID 0576
Operating at USB 2.1 Speed
SusWrite @10s intervals: 25 25 25 25 24 25 MB/s
14% Very poor
Read 25.3
Write 24.7
Mixed 24.8
SusWrite 24.7
34% 24.9 MB/s
4K Read 1.6
4K Write 1.5
4K Mixed 1.8
118% 1.63 MB/s
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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.

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