TEST
YOUR USB

ADATA (ExtHD)

HM800 4TB

▲ 500 ▼

Release date ≈ Q1 2020.

Average Bench: 72.4% (7th of 639)

Based on 66 user benchmarks.  Device: VID 125f PID a92a Model: ADATA HM800
Poor: 28%Average: 72.4% Great: 110%

Good average bench

The ADATA HM800 4TB averaged 27.5% 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 10.9MB/s
Avg. 4K Random Write Speed 8.61MB/s

Terrible consistency

The range of scores (95th - 5th percentile) for the ADATA HM800 4TB is 81.9%. This is a particularly wide range which indicates that the ADATA HM800 4TB performs inconsistently under varying real world conditions.

Weaknesses

Avg. 4K-64Thread Read Speed 0.55MB/s
Avg. Sequential Read Speed 130MB/s
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Average Bench

(Based on 66 samples)
Rank 772.4%
Min Avg Max
29.8 Read 130 205
14.8 Write 118 176
24.4 Mixed 81.6 128
8.61 SusWrite 113 182
147% 111 MB/s
Min Avg Max
0.74 4K Read 10.2 23.4
0.7 4K Write 8.61 12.4
0.34 4K Mixed 0.85 1.1
360% 6.57 MB/s
Min Avg Max
0.4 DQ Read 0.55 0.7
9.46 DQ Write 10.9 12.4
0.33 DQ Mixed 0.85 1.2
400% 4.09 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest USB (mainstream) averages a speed of 100%
729GB free, PID a92a
Operating at USB 3.0 Speed
SusWrite @10s intervals: 124 121 123 123 124 123 MB/s
85.1% Excellent
Read 158
Write 150
Mixed 91.1
SusWrite 123
173% 131 MB/s
4K Read 15.5
4K Write 10.3
4K Mixed 0.9
438% 8.9 MB/s
DQ Read 0.5
DQ Write 11.1
DQ Mixed 1
413% 4.2 MB/s
3TB free, PID a92a
Operating at USB 3.0 Speed
SusWrite @10s intervals: 120 174 171 175 174 175 MB/s
74.7% Very good
Read 126
Write 158
Mixed 74.9
SusWrite 165
181% 131 MB/s
4K Read 1.9
4K Write 6.5
4K Mixed 1
262% 3.13 MB/s
599GB free, PID a92a
Operating at USB 3.0 Speed
SusWrite @10s intervals: 94 93 93 92 93 96 MB/s
73.5% Very good
Read 96.7
Write 95.1
Mixed 73.7
SusWrite 93.4
122% 89.7 MB/s
4K Read 13.2
4K Write 11.7
4K Mixed 1.1
484% 8.67 MB/s
DQ Read 0.6
DQ Write 11.8
DQ Mixed 1.3
448% 4.57 MB/s
3.5TB free, PID a92a
Operating at USB 3.0 Speed
SusWrite @10s intervals: 164 175 173 177 172 164 MB/s
72.7% Very good
Read 124
Write 152
Mixed 67.8
SusWrite 171
177% 128 MB/s
4K Read 1.4
4K Write 5.6
4K Mixed 0.9
226% 2.63 MB/s
599GB free, PID a92a
Operating at USB 3.0 Speed
SusWrite @10s intervals: 91 92 88 92 94 95 MB/s
71.5% Very good
Read 96.3
Write 91.1
Mixed 72.3
SusWrite 92
119% 87.9 MB/s
4K Read 13
4K Write 11.2
4K Mixed 1
463% 8.4 MB/s
DQ Read 0.5
DQ Write 11.4
DQ Mixed 0.7
413% 4.2 MB/s
889GB free, PID a92a
Operating at USB 3.0 Speed
SusWrite @10s intervals: 94 97 98 97 96 93 MB/s
34.3% Below average
Read 70
Write 150
Mixed 93
SusWrite 95.9
148% 102 MB/s
4K Read 3.2
4K Write 0.8
4K Mixed 0.3
49% 1.43 MB/s
980GB free, PID a92a
Operating at USB 3.0 Speed
SusWrite @10s intervals: 86 86 85 82 83 84 MB/s
27.8% Poor
Read 49
Write 109
Mixed 80.2
SusWrite 84.4
118% 80.6 MB/s
4K Read 0.8
4K Write 0.7
4K Mixed 0.3
37% 0.6 MB/s
66 MORE »
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  • Fastest real world speed - Real World Speed measures performance for typical consumers.

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