TEST
YOUR USB

WDC (ExtHD)

WD40 EZRX-00SPEB0 4TB

▲ 500 ▼

Release date ≈ Q3 2015.

Average Bench: 34.1% (63rd of 639)

Based on 30 user benchmarks.  Device: VID 174c PID 55aa Model: WDC WD40 EZRX-00SPEB0
Poor: 6%Average: 34.1% Great: 55%

Poor average bench

The WDC WD40 EZRX-00SPEB0 4TB averaged 65.8% 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 Random Write Speed 1.85MB/s
Avg. Sequential Write Speed 78MB/s

Average consistency

The range of scores (95th - 5th percentile) for the WDC WD40 EZRX-00SPEB0 4TB is 49.5%. This is a relatively wide range which indicates that the WDC WD40 EZRX-00SPEB0 4TB performs inconsistently under varying real world conditions.

Weaknesses

Avg. 4K Random Read Speed 0.76MB/s
Avg. Sequential Read Speed 77.7MB/s
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Average Bench

(Based on 30 samples)
Rank 6334.1%
Min Avg Max
14.5 Read 77.7 150
11.4 Write 78 152
14.7 Mixed 58.3 107
1.4 SusWrite 73 142
97% 71.7 MB/s
Min Avg Max
0.1 4K Read 0.76 1.1
0.2 4K Write 1.85 2.6
0.1 4K Mixed 0.6 1
86.2% 1.07 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest USB (mainstream) averages a speed of 100%
2TB free, PID 55aa
Operating at USB 3.0 Speed
SusWrite @10s intervals: 115 120 120 119 120 118 MB/s
50% Above average
Read 112
Write 114
Mixed 82.9
SusWrite 119
145% 107 MB/s
4K Read 0.9
4K Write 2.5
4K Mixed 1
122% 1.47 MB/s
689GB free, PID 55aa
Operating at USB 3.0 Speed
SusWrite @10s intervals: 107 108 109 110 109 107 MB/s
48.3% Average
Read 119
Write 119
Mixed 77.2
SusWrite 108
142% 106 MB/s
4K Read 1
4K Write 2.3
4K Mixed 0.9
112% 1.4 MB/s
497GB free, PID 55aa
Operating at USB 2.1 Speed
SusWrite @10s intervals: 15 16 15 15 15 16 MB/s
8.16% Terrible
Read 21.4
Write 20.9
Mixed 20.1
SusWrite 15.3
26% 19.4 MB/s
4K Read 0.8
4K Write 0.5
4K Mixed 0.5
37% 0.6 MB/s
419GB free, PID 55aa
Operating at USB 2.1 Speed
SusWrite @10s intervals: 12 12 12 12 12 12 MB/s
8% Terrible
Read 25.2
Write 22.7
Mixed 21.4
SusWrite 12
27% 20.3 MB/s
4K Read 0.8
4K Write 0.5
4K Mixed 0.5
37% 0.6 MB/s
30 MORE »
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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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