TEST
YOUR USB

WDC (ExtHD)

WD40 03FFBX-68MU3N0 4TB

▲ 500 ▼

Release date ≈ Q2 2019.

Average Bench: 79.8% (6th of 639)

Based on 7 user benchmarks.  Device: VID 152d PID 0567 Model: WDC WD40 03FFBX-68MU3N0
Poor: 48%Average: 79.8% Great: 102%

Good average bench

The WDC WD40 03FFBX-68MU3N0 4TB averaged 20.1% lower than the peak scores attained by the group leaders. This is an excellent result which ranks the WDC WD40 03FFBX-68MU3N0 4TB near the top of the comparison list.

Strengths

Avg. 4K Random Write Speed 7.77MB/s
Avg. 4K-64Thread Write Speed 4.93MB/s

Below average consistency

The range of scores (95th - 5th percentile) for the WDC WD40 03FFBX-68MU3N0 4TB is 54.1%. This is a relatively wide range which indicates that the WDC WD40 03FFBX-68MU3N0 4TB performs inconsistently under varying real world conditions.

Weaknesses

Avg. 4K-64Thread Read Speed 0.88MB/s
Avg. 4K Random Read Speed 2.83MB/s
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Average Bench

(Based on 7 samples)
Rank 679.8%
Min Avg Max
121 Read 200 241
126 Write 203 250
81 Mixed 114 139
0.5 SusWrite 120 184
209% 159 MB/s
Min Avg Max
1.2 4K Read 2.83 3.9
3.2 4K Write 7.77 9.9
1.2 4K Mixed 1.46 1.7
324% 4.02 MB/s
Min Avg Max
0.7 DQ Read 0.88 1
4.6 DQ Write 4.93 5.3
1.8 DQ Mixed 1.88 2
235% 2.56 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest USB (mainstream) averages a speed of 100%
3.5TB free, PID 0567
Operating at USB 3.0 Speed
SusWrite @10s intervals: 156 158 158 159 159 162 MB/s
101% Outstanding
Read 241
Write 250
Mixed 139
SusWrite 159
260% 197 MB/s
4K Read 3.8
4K Write 9.9
4K Mixed 1.4
398% 5.03 MB/s
DQ Read 0.7
DQ Write 4.6
DQ Mixed 1.8
220% 2.37 MB/s
3.5TB free, PID 0567
Operating at USB 3.0 Speed
SusWrite @10s intervals: 92 91 92 93 93 94 MB/s
76.3% Very good
Read 231
Write 241
Mixed 128
SusWrite 92.3
224% 173 MB/s
4K Read 3.9
4K Write 7.1
4K Mixed 1.6
310% 4.2 MB/s
877GB free, PID 0567
Operating at USB 3.0 Speed
SusWrite @10s intervals: 87 129 119 114 111 120 MB/s
76.3% Very good
Read 214
Write 194
Mixed 124
SusWrite 113
209% 161 MB/s
4K Read 3.4
4K Write 6.4
4K Mixed 1.7
288% 3.83 MB/s
877GB free, PID 0567
Operating at USB 3.0 Speed
SusWrite @10s intervals: 187 173 189 188 182 183 MB/s
75.4% Very good
Read 173
Write 168
Mixed 110
SusWrite 184
214% 158 MB/s
4K Read 1.9
4K Write 3.2
4K Mixed 1.3
160% 2.13 MB/s
1.5TB free, PID 0567
Operating at USB 3.0 Speed
SusWrite @10s intervals: MB/s
47.8% Average
Read 121
Write 126
Mixed 89.4
SusWrite 0.5
107% 84.3 MB/s
4K Read 2.6
4K Write 9.6
4K Mixed 1.2
377% 4.47 MB/s
DQ Read 0.9
DQ Write 4.8
DQ Mixed 1.8
228% 2.5 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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