TEST
YOUR USB

Kingston (ExtHD)

SNA-DC/U 256GB

▲ 500 ▼

Release date ≤ Q1 2014.

Average Bench: 60.3% (14th of 639)

Based on 105 user benchmarks.  Device: VID 11b0 PID 6298 Model: Kingston SNA-DC/U
Poor: 23%Average: 60.3% Great: 79%

Above average average bench

The Kingston SNA-DC/U 256GB averaged 39.6% 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 19.7MB/s
Avg. 4K Random Write Speed 14.6MB/s

Below average consistency

The range of scores (95th - 5th percentile) for the Kingston SNA-DC/U 256GB is 55.6%. This is a relatively wide range which indicates that the Kingston SNA-DC/U 256GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sequential Read Speed 36.1MB/s
Avg. Sequential Mixed IO Speed 34.5MB/s
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Average Bench

(Based on 105 samples)
Rank 1460.3%
Min Avg Max
26.6 Read 36.1 41.8
21.8 Write 34.8 42.2
25.5 Mixed 34.5 41
20.3 SusWrite 36.4 42.8
48.5% 35.5 MB/s
Min Avg Max
4.19 4K Read 10 13.5
4.34 4K Write 14.6 19.9
2.03 4K Mixed 9.86 15.7
870% 11.5 MB/s
Min Avg Max
9.13 DQ Read 12.8 14.8
14.9 DQ Write 19.7 23.5
6.63 DQ Mixed 12.8 17.6
1,152% 15.1 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest USB (mainstream) averages a speed of 100%
238GB free, PID 6298
Operating at USB 2.0 Speed
SusWrite @10s intervals: 39 40 39 40 40 40 MB/s
63.2% Good
Read 51.6
Write 38.4
Mixed 39.2
SusWrite 39.5
56% 42.2 MB/s
4K Read 17.2
4K Write 14
4K Mixed 15.6
1,071% 15.6 MB/s
DQ Read 15.3
DQ Write 23
DQ Mixed 17.7
1,441% 18.7 MB/s
22GB free, PID 6298
Operating at USB 2.0 Speed
SusWrite @10s intervals: 41 39 41 40 39 35 MB/s
62.6% Good
Read 50
Write 41.1
Mixed 41
SusWrite 39.2
57% 42.8 MB/s
4K Read 14.7
4K Write 14.1
4K Mixed 14.1
1,014% 14.3 MB/s
DQ Read 13
DQ Write 18.4
DQ Mixed 14.9
1,181% 15.4 MB/s
87GB free, PID 6298
Operating at USB 2.0 Speed
SusWrite @10s intervals: 42 42 42 42 42 42 MB/s
58.8% Above average
Read 50
Write 38.4
Mixed 37.9
SusWrite 42
56% 42.1 MB/s
4K Read 13.1
4K Write 12.8
4K Mixed 10
824% 12 MB/s
DQ Read 11.2
DQ Write 18.9
DQ Mixed 10.4
1,038% 13.5 MB/s
32GB free, PID 6298
Operating at USB 2.0 Speed
SusWrite @10s intervals: 37 39 39 40 40 39 MB/s
58.8% Above average
Read 39
Write 38.8
Mixed 38.3
SusWrite 38.9
53% 38.8 MB/s
4K Read 17.3
4K Write 13.2
4K Mixed 14.8
1,016% 15.1 MB/s
DQ Read 15.4
DQ Write 21.1
DQ Mixed 16.5
1,336% 17.7 MB/s
141GB free, PID 6298
Operating at USB 2.0 Speed
SusWrite @10s intervals: 38 39 39 40 40 40 MB/s
58.7% Above average
Read 50
Write 38
Mixed 37.6
SusWrite 39.3
54% 41.2 MB/s
4K Read 16.5
4K Write 12.7
4K Mixed 13.9
966% 14.4 MB/s
DQ Read 14.5
DQ Write 21.9
DQ Mixed 16.8
1,370% 17.7 MB/s
238GB free, PID 6298
Operating at USB 2.0 Speed
SusWrite @10s intervals: 37 40 40 41 41 41 MB/s
58.6% Above average
Read 52.2
Write 38.2
Mixed 38.6
SusWrite 39.9
56% 42.2 MB/s
4K Read 15.5
4K Write 12.6
4K Mixed 14.1
966% 14.1 MB/s
DQ Read 13.4
DQ Write 17.8
DQ Mixed 15
1,165% 15.4 MB/s
101GB free, PID 6298
Operating at USB 2.0 Speed
SusWrite @10s intervals: 28 26 32 26 37 36 MB/s
54.2% Above average
Read 36.6
Write 40.5
Mixed 37.7
SusWrite 30.9
50% 36.4 MB/s
4K Read 13.1
4K Write 12.7
4K Mixed 12.6
909% 12.8 MB/s
DQ Read 14
DQ Write 22.7
DQ Mixed 16.4
1,382% 17.7 MB/s
105 MORE »
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