TEST
YOUR USB

JMicron (ExtHD)

Generic 250GB

▲ 500 ▼

Release date ≈ Q4 2014.

Average Bench: 82.9% (5th of 639)

Based on 52 user benchmarks.  Device: VID 152d PID 0567 Model: JMicron Generic
Poor: 13%Average: 82.9% Great: 223%

Very good average bench

The JMicron Generic 250GB averaged just 17.0% lower than the peak scores attained by the group leaders. This is an excellent result which ranks the JMicron Generic 250GB near the top of the comparison list.

Strengths

Avg. 4K-64Thread Write Speed 34.3MB/s
Avg. 4K-64Thread Mixed IO Speed 22.8MB/s

Terrible consistency

The range of scores (95th - 5th percentile) for the JMicron Generic 250GB is 210%. This is a particularly wide range which indicates that the JMicron Generic 250GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sequential Read Speed 129MB/s
Avg. 4K Random Read Speed 8.49MB/s
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Average Bench

(Based on 52 samples)
Rank 582.9%
Min Avg Max
25.6 Read 129 393
20.3 Write 131 399
17.3 Mixed 114 373
17.3 SusWrite 148 334
179% 130 MB/s
Min Avg Max
0.34 4K Read 8.49 26.3
0.47 4K Write 11.6 46.4
0.22 4K Mixed 7.78 27.2
692% 9.31 MB/s
Min Avg Max
15.1 DQ Read 23.4 38.2
17.8 DQ Write 34.3 72.9
8.85 DQ Mixed 22.8 48.6
2,028% 26.8 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest USB (mainstream) averages a speed of 100%
36GB free, PID 0567
Operating at USB 3.0 Speed
SusWrite @10s intervals: 359 298 268 251 231 223 MB/s
199% Outstanding
Read 396
Write 391
Mixed 350
SusWrite 272
473% 352 MB/s
4K Read 23.8
4K Write 25.1
4K Mixed 24.3
1,768% 24.4 MB/s
DQ Read 25.7
DQ Write 26.6
DQ Mixed 25.8
1,878% 26 MB/s
22GB free, PID 0567
Operating at USB 3.0 Speed
SusWrite @10s intervals: 76 78 78 64 75 78 MB/s
26.8% Poor
Read 48.4
Write 51
Mixed 32.7
SusWrite 74.7
72% 51.7 MB/s
4K Read 0.5
4K Write 1.1
4K Mixed 0.7
63% 0.77 MB/s
122GB free, PID 0567
Operating at USB 3.0 Speed
SusWrite @10s intervals: 44 44 43 44 41 41 MB/s
19.9% Very poor
Read 53.3
Write 49.7
Mixed 32.6
SusWrite 42.6
59% 44.6 MB/s
4K Read 0.4
4K Write 0.9
4K Mixed 0.7
56% 0.67 MB/s
52 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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