TEST
YOUR USB

JMicron (ExtHD)

Tech 512GB

▲ 500 ▼

Release date ≈ Q1 2019.

Average Bench: 152% (1st of 639)

Based on 13 user benchmarks.  Device: VID 152d PID 0562 Model: JMicron Tech
Poor: 61%Average: 152% Great: 261%

Outstanding average bench

The JMicron Tech 512GB averaged 52.2% higher than the peak scores attained by the group leaders. This is an excellent result which ranks the JMicron Tech 512GB near the top of the comparison list.

Strengths

Avg. 4K-64Thread Write Speed 38.4MB/s
Avg. 4K Random Write Speed 29.2MB/s

Terrible consistency

The range of scores (95th - 5th percentile) for the JMicron Tech 512GB is 200%. This is a particularly wide range which indicates that the JMicron Tech 512GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sequential Read Speed 169MB/s
Avg. 4K Random Read Speed 19MB/s
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Average Bench

(Based on 13 samples)
Rank 1152%
Min Avg Max
0.7 Read 169 374
0.7 Write 199 358
0.7 Mixed 160 328
0.8 SusWrite 154 339
234% 171 MB/s
Min Avg Max
0.8 4K Read 19 35.1
0.8 4K Write 29.2 66.3
0.8 4K Mixed 21.1 45
1,781% 23.1 MB/s
Min Avg Max
12.4 DQ Read 23.1 37.9
14.8 DQ Write 38.4 78.7
6.8 DQ Mixed 26.5 50.3
2,292% 29.3 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest USB (mainstream) averages a speed of 100%
232GB free, PID 0562
SusWrite @10s intervals: 318 315 327 237 115 149 MB/s
261% Outstanding
Read 257
Write 312
Mixed 262
SusWrite 244
371% 269 MB/s
4K Read 22.9
4K Write 53.8
4K Mixed 30.9
2,966% 35.9 MB/s
DQ Read 24.3
DQ Write 55.9
DQ Mixed 33.4
3,128% 37.9 MB/s
477GB free, PID 0562
Operating at USB 3.2 Speed
SusWrite @10s intervals: 294 302 303 304 303 304 MB/s
154% Outstanding
Read 24.6
Write 305
Mixed 17.1
SusWrite 302
255% 162 MB/s
4K Read 24.2
4K Write 25.8
4K Mixed 24.8
1,811% 24.9 MB/s
DQ Read 26.3
DQ Write 27.8
DQ Mixed 26.5
1,944% 26.9 MB/s
71GB free, PID 0562
Operating at USB 2.1 Speed
SusWrite @10s intervals: 40 40 39 39 39 38 MB/s
75.3% Very good
Read 39.6
Write 39.3
Mixed 36.5
SusWrite 39.3
53% 38.7 MB/s
4K Read 12.2
4K Write 18.9
4K Mixed 6.5
909% 12.5 MB/s
DQ Read 13.1
DQ Write 19.6
DQ Mixed 6.8
946% 13.2 MB/s
477GB free, PID 0562
Operating at USB 2.1 Speed
SusWrite @10s intervals: 0.8 0.8 0.8 0.8 0.8 0.8 MB/s
2.92% Terrible
Read 0.7
Write 0.7
Mixed 0.7
SusWrite 0.8
1% 0.72 MB/s
4K Read 0.8
4K Write 0.8
4K Mixed 0.8
57% 0.8 MB/s
13 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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