TEST
YOUR USB

JMicron (ExtHD)

Generic 40GB

▲ 505 ▼

Release date ≈ Q2 2017.

Average Bench: 99.6% (5th of 639)

Based on 36 user benchmarks.  Device: VID 152d PID 0578 Model: JMicron Generic
Poor: 29%Average: 99.6% Great: 134%

Excellent average bench

The JMicron Generic 40GB averaged just 0.3% lower than the peak scores attained by the group leaders. This is an excellent result which ranks the JMicron Generic 40GB near the top of the comparison list.

Strengths

Avg. 4K-64Thread Write Speed 33.4MB/s
Avg. 4K Random Write Speed 21.7MB/s

Terrible consistency

The range of scores (95th - 5th percentile) for the JMicron Generic 40GB is 105%. This is a particularly wide range which indicates that the JMicron Generic 40GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sustained Write Speed 37.5MB/s
Avg. Sequential Write Speed 42.3MB/s
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Average Bench

(Based on 36 samples)
Rank 599.6%
Min Avg Max
24.8 Read 142 184
18.2 Write 42.3 47.8
13.2 Mixed 51.3 73.7
22.4 SusWrite 37.5 47.8
76.2% 68.3 MB/s
Min Avg Max
0.4 4K Read 12.9 17.3
0.9 4K Write 21.7 33.9
0.4 4K Mixed 8.63 13
1,080% 14.4 MB/s
Min Avg Max
13.3 DQ Read 17.8 21.2
16 DQ Write 33.4 40.3
7.4 DQ Mixed 11.2 18.4
1,583% 20.8 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest USB (mainstream) averages a speed of 100%
36GB free, PID 0578
Operating at USB 3.0 Speed
SusWrite @10s intervals: 48 47 48 48 48 48 MB/s
144% Outstanding
Read 182
Write 47.7
Mixed 65.5
SusWrite 47.8
95% 85.6 MB/s
4K Read 13.2
4K Write 33.9
4K Mixed 11.9
1,607% 19.7 MB/s
DQ Read 17.3
DQ Write 40.3
DQ Mixed 16.4
1,993% 24.7 MB/s
36GB free, PID 0578
Operating at USB 3.0 Speed
SusWrite @10s intervals: 47 47 47 48 48 48 MB/s
143% Outstanding
Read 183
Write 47.4
Mixed 66.6
SusWrite 47.4
95% 86.2 MB/s
4K Read 13.7
4K Write 33.6
4K Mixed 13
1,636% 20.1 MB/s
DQ Read 17.3
DQ Write 38.2
DQ Mixed 18.4
1,989% 24.6 MB/s
37GB free, PID 0578
Operating at USB 3.0 Speed
123% Outstanding
Read 177
Write 46.8
Mixed 56.2
94% 93.2 MB/s
4K Read 16.3
4K Write 27
4K Mixed 9.93
1,316% 17.7 MB/s
DQ Read 18.5
DQ Write 35.4
DQ Mixed 10.6
1,636% 21.5 MB/s
37GB free, PID 0578
Operating at USB 3.0 Speed
121% Outstanding
Read 174
Write 47
Mixed 57.8
94% 92.8 MB/s
4K Read 16.3
4K Write 26.4
4K Mixed 9.89
1,296% 17.6 MB/s
DQ Read 18.5
DQ Write 35.3
DQ Mixed 10.7
1,632% 21.5 MB/s
36GB free, PID 0578
Operating at USB 3.0 Speed
SusWrite @10s intervals: 44 34 35 39 38 40 MB/s
107% Outstanding
Read 163
Write 47.8
Mixed 66.5
SusWrite 38.4
88% 78.8 MB/s
4K Read 14.2
4K Write 23.4
4K Mixed 12.8
1,284% 16.8 MB/s
DQ Read 18.9
DQ Write 35
DQ Mixed 17.6
1,859% 23.8 MB/s
36GB free, PID 0578
Operating at USB 3.0 Speed
SusWrite @10s intervals: 46 46 46 47 46 46 MB/s
86.4% Excellent
Read 177
Write 39
Mixed 69
SusWrite 46.2
91% 82.9 MB/s
4K Read 9.9
4K Write 15.7
4K Mixed 8.1
846% 11.2 MB/s
DQ Read 21.2
DQ Write 37.3
DQ Mixed 18.1
1,963% 25.5 MB/s
36GB free, PID 0578
Operating at USB 2.1 Speed
SusWrite @10s intervals: 20 22 23 24 24 24 MB/s
33.8% Below average
Read 25.8
Write 23.4
Mixed 23.9
SusWrite 22.7
32% 24 MB/s
4K Read 7.6
4K Write 7.6
4K Mixed 7.2
532% 7.47 MB/s
11GB free, PID 0578
Operating at USB 2.1 Speed
SusWrite @10s intervals: 22 22 23 23 22 22 MB/s
11.3% Very poor
Read 24.8
Write 18.2
Mixed 13.2
SusWrite 22.4
26% 19.6 MB/s
4K Read 0.4
4K Write 0.9
4K Mixed 0.4
46% 0.57 MB/s
36 MORE »
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  • Fastest real world speed - Real World Speed measures performance for typical consumers.

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