TEST
YOUR USB

(ExtHD)

JMicron 250GB

▲ 500 ▼

Release date ≈ Q4 2017.

Average Bench: 77.9% (6th of 639)

Based on 5 user benchmarks.  Device: VID 152d PID 0539 Model: JMicron
Poor: 21%Average: 77.9% Great: 157%

Good average bench

The JMicron 250GB averaged 22.0% lower than the peak scores attained by the group leaders. This is an excellent result which ranks the JMicron 250GB near the top of the comparison list.

Strengths

Avg. 4K-64Thread Write Speed 29.5MB/s
Avg. 4K-64Thread Mixed IO Speed 10.4MB/s

Unknown consistency

There are too few samples to reasonably determine how consistently this USB perfroms. This result should be interpreted with caution.

Weaknesses

Avg. 4K Random Read Speed 6.04MB/s
Avg. Sequential Read Speed 132MB/s
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Average Bench

(Based on 5 samples)
Rank 677.9%
Min Avg Max
46 Read 132 231
47.4 Write 130 229
10.8 Mixed 115 226
58 SusWrite 58 58
144% 109 MB/s
Min Avg Max
0.33 4K Read 6.04 15.4
1.03 4K Write 10 23.2
0.35 4K Mixed 4.31 9.87
510% 6.79 MB/s
Min Avg Max
16.9 DQ Read 17.6 18.2
25.7 DQ Write 29.5 33.3
8.92 DQ Mixed 10.4 11.9
1,423% 19.2 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest USB (mainstream) averages a speed of 100%
77GB free, PID 0539
Operating at USB 3.0 Speed
157% Outstanding
Read 231
Write 225
Mixed 226
293% 227 MB/s
4K Read 15.4
4K Write 23.2
4K Mixed 9.87
1,181% 16.2 MB/s
DQ Read 18.2
DQ Write 25.7
DQ Mixed 11.9
1,346% 18.6 MB/s
110GB free, PID 0539
Operating at USB 3.0 Speed
156% Outstanding
Read 228
Write 229
Mixed 213
287% 223 MB/s
4K Read 12.7
4K Write 22.8
4K Mixed 9.57
1,148% 15 MB/s
DQ Read 16.9
DQ Write 33.3
DQ Mixed 8.92
1,500% 19.7 MB/s
13GB free, PID 0539
Operating at USB 3.0 Speed
SusWrite @10s intervals: 57 57 58 58 59 59 MB/s
31.5% Below average
Read 100
Write 100
Mixed 100
SusWrite 58
120% 89.6 MB/s
4K Read 1.3
4K Write 1.3
4K Mixed 1.3
93% 1.3 MB/s
209GB free, PID 0539
Operating at USB 3.0 Speed
23.4% Poor
Read 46
Write 49.7
Mixed 28
52% 41.3 MB/s
4K Read 0.33
4K Write 1.89
4K Mixed 0.46
81% 0.89 MB/s
149GB free, PID 0539
Operating at USB 3.0 Speed
21.5% Poor
Read 54.4
Write 47.4
Mixed 10.8
43% 37.5 MB/s
4K Read 0.42
4K Write 1.03
4K Mixed 0.35
48% 0.6 MB/s
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