TEST
YOUR USB

ADATA (ExtHD)

SU 800 256GB

▲ 500 ▼

Release date ≈ Q3 2017.

Average Bench: 76.3% (6th of 639)

Based on 6 user benchmarks.  Device: VID 1f75 PID 0621 Model: ADATA SU 800
Poor: 30%Average: 76.3% Great: 112%

Good average bench

The ADATA SU 800 256GB averaged 23.6% lower than the peak scores attained by the group leaders. This is an excellent result which ranks the ADATA SU 800 256GB near the top of the comparison list.

Strengths

Avg. 4K-64Thread Write Speed 23.9MB/s
Avg. 4K Random Write Speed 14.5MB/s

Terrible consistency

The range of scores (95th - 5th percentile) for the ADATA SU 800 256GB is 82.1%. This is a particularly wide range which indicates that the ADATA SU 800 256GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sequential Read Speed 82.7MB/s
Avg. Sustained Write Speed 48.5MB/s
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Average Bench

(Based on 6 samples)
Rank 676.3%
Min Avg Max
32.7 Read 82.7 108
26.8 Write 79.6 106
29 Mixed 80.7 107
22.6 SusWrite 48.5 95.5
97.7% 72.9 MB/s
Min Avg Max
6.2 4K Read 12.6 17.7
6.2 4K Write 14.5 22.6
6.1 4K Mixed 10.2 14
887% 12.4 MB/s
Min Avg Max
14.3 DQ Read 18 19.4
18.3 DQ Write 23.9 26.4
11.4 DQ Mixed 12.6 16
1,306% 18.1 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest USB (mainstream) averages a speed of 100%
16GB free, PID 0621
Operating at USB 3.0 Speed
112% Outstanding
Read 107
Write 106
Mixed 106
137% 106 MB/s
4K Read 17.7
4K Write 22.6
4K Mixed 11.3
1,218% 17.2 MB/s
DQ Read 19.4
DQ Write 25.1
DQ Mixed 11.4
1,313% 18.6 MB/s
16GB free, PID 0621
Operating at USB 3.0 Speed
97.3% Outstanding
Read 108
Write 106
Mixed 107
138% 107 MB/s
4K Read 16
4K Write 17.8
4K Mixed 11.1
1,041% 14.9 MB/s
DQ Read 19.1
DQ Write 26.4
DQ Mixed 11.5
1,361% 19 MB/s
16GB free, PID 0621
Operating at USB 3.0 Speed
96.2% Outstanding
Read 107
Write 105
Mixed 106
137% 106 MB/s
4K Read 14.8
4K Write 17.6
4K Mixed 11.2
1,036% 14.6 MB/s
DQ Read 19.1
DQ Write 25.6
DQ Mixed 11.5
1,332% 18.7 MB/s
25GB free (System drive), PID 0621
Operating at USB 3.0 Speed
SusWrite @10s intervals: 101 102 103 105 106 56 MB/s
85.9% Excellent
Read 107
Write 105
Mixed 106
SusWrite 95.5
141% 103 MB/s
4K Read 13.5
4K Write 15.1
4K Mixed 14
1,040% 14.2 MB/s
DQ Read 14.3
DQ Write 18.3
DQ Mixed 16
1,220% 16.2 MB/s
53GB free, PID 0621
Operating at USB 2.1 Speed
SusWrite @10s intervals: 27 27 27 27 27 28 MB/s
36.2% Below average
Read 33.5
Write 28.5
Mixed 30.5
SusWrite 27.3
40% 30 MB/s
4K Read 7.4
4K Write 7.7
4K Mixed 7.6
548% 7.57 MB/s
53GB free, PID 0621
Operating at USB 2.1 Speed
SusWrite @10s intervals: 24 24 22 22 22 22 MB/s
30.2% Below average
Read 32.7
Write 26.8
Mixed 29
SusWrite 22.6
37% 27.8 MB/s
4K Read 6.2
4K Write 6.2
4K Mixed 6.1
441% 6.17 MB/s
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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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