TEST
YOUR USB

OWC (ExtHD)

Express USB 3.0 250GB

▲ 500 ▼

Release date ≈ Q2 2017.

Average Bench: 51.9% (21st of 639)

Based on 8 user benchmarks.  Device: VID 1e91 PID a0a9 Model: OWC Express USB 3.0
Poor: 6%Average: 51.9% Great: 185%

Average average bench

The OWC Express USB 3.0 250GB averaged 48.1% lower than the peak scores attained by the group leaders. This isn't a great result which indicates that there are much faster alternatives on the comparison list.

Strengths

Avg. 4K-64Thread Write Speed 24.3MB/s
Avg. 4K-64Thread Mixed IO Speed 18.4MB/s

Terrible consistency

The range of scores (95th - 5th percentile) for the OWC Express USB 3.0 250GB is 178%. This is a particularly wide range which indicates that the OWC Express USB 3.0 250GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sequential Read Speed 80.6MB/s
Avg. 4K Random Read Speed 6.92MB/s
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Average Bench

(Based on 8 samples)
Rank 2151.9%
Min Avg Max
12.5 Read 80.6 373
14.5 Write 80.7 370
9.88 Mixed 63.8 310
13.8 SusWrite 64.7 209
97.5% 72.5 MB/s
Min Avg Max
0.2 4K Read 6.92 19.6
0.5 4K Write 8.18 26.2
0.27 4K Mixed 6.96 20.9
541% 7.35 MB/s
Min Avg Max
13.1 DQ Read 15.7 20.8
17.4 DQ Write 24.3 38.1
14.9 DQ Mixed 18.4 25.3
1,512% 19.5 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest USB (mainstream) averages a speed of 100%
83GB free, PID a0a9
Operating at USB 3.0 Speed
SusWrite @10s intervals: 300 128 269 137 208 214 MB/s
185% Outstanding
Read 373
Write 370
Mixed 310
SusWrite 209
419% 315 MB/s
4K Read 19.6
4K Write 26.2
4K Mixed 20.9
1,675% 22.2 MB/s
DQ Read 20.8
DQ Write 38.1
DQ Mixed 25.3
2,234% 28.1 MB/s
51GB free, PID a0a9
Operating at USB 2.1 Speed
SusWrite @10s intervals: 38 38 39 39 39 39 MB/s
64.8% Good
Read 39.1
Write 38.4
Mixed 38.5
SusWrite 38.6
53% 38.7 MB/s
4K Read 11.9
4K Write 15.6
4K Mixed 13.5
1,034% 13.7 MB/s
DQ Read 13.1
DQ Write 17.5
DQ Mixed 15
1,154% 15.2 MB/s
51GB free, PID a0a9
Operating at USB 2.1 Speed
SusWrite @10s intervals: 37 38 38 38 38 38 MB/s
57.2% Above average
Read 38.5
Write 38.1
Mixed 38.4
SusWrite 38
52% 38.2 MB/s
4K Read 10.5
4K Write 13.3
4K Mixed 11.6
886% 11.8 MB/s
DQ Read 13.1
DQ Write 17.4
DQ Mixed 14.9
1,147% 15.1 MB/s
164GB free, PID a0a9
Operating at USB 2.1 Speed
SusWrite @10s intervals: 36 36 35 37 39 39 MB/s
37.4% Below average
Read 51.8
Write 35.4
Mixed 35.9
SusWrite 37
52% 40 MB/s
4K Read 11.8
4K Write 6.2
4K Mixed 7.9
523% 8.63 MB/s
163GB free, PID a0a9
Operating at USB 3.0 Speed
SusWrite @10s intervals: 67 66 68 69 69 69 MB/s
28.7% Poor
Read 67.5
Write 63.2
Mixed 38
SusWrite 68.1
79% 59.2 MB/s
4K Read 0.5
4K Write 1.3
4K Mixed 0.6
66% 0.8 MB/s
182GB free, PID a0a9
Operating at USB 2.1 Speed
18.1% Very poor
Read 39.6
Write 38.6
Mixed 9.88
35% 29.3 MB/s
4K Read 0.5
4K Write 1.23
4K Mixed 0.27
53% 0.67 MB/s
64GB free, PID a0a9
Operating at USB 3.0 Speed
SusWrite @10s intervals: 48 48 48 48 48 47 MB/s
17.3% Very poor
Read 23.2
Write 47.9
Mixed 25.9
SusWrite 47.9
53% 36.2 MB/s
4K Read 0.4
4K Write 1.1
4K Mixed 0.5
56% 0.67 MB/s
63GB free, PID a0a9
Operating at USB 2.1 Speed
SusWrite @10s intervals: 15 16 17 17 9 8.7 MB/s
6.4% Terrible
Read 12.5
Write 14.5
Mixed 14.2
SusWrite 13.8
19% 13.8 MB/s
4K Read 0.2
4K Write 0.5
4K Mixed 0.4
31% 0.37 MB/s
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