TEST
YOUR USB

WDC (ExtHD)

WD40EZRX-00S 4TB

▲ 500 ▼

Release date ≈ Q3 2014.

Average Bench: 44.7% (32nd of 639)

Based on 13 user benchmarks.  Device: VID 2537 PID 1066 Model: WDC WD40EZRX-00S
Poor: 22%Average: 44.7% Great: 63%

Below average average bench

The WDC WD40EZRX-00S 4TB averaged 55.3% 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 2.23MB/s
Avg. Sequential Write Speed 109MB/s

Average consistency

The range of scores (95th - 5th percentile) for the WDC WD40EZRX-00S 4TB is 40.9%. This is a relatively wide range which indicates that the WDC WD40EZRX-00S 4TB performs inconsistently under varying real world conditions.

Weaknesses

Avg. 4K Random Read Speed 0.9MB/s
Avg. Sequential Read Speed 109MB/s
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Average Bench

(Based on 13 samples)
Rank 3244.7%
Min Avg Max
32 Read 109 165
27 Write 109 156
24.3 Mixed 78.6 112
27.4 SusWrite 105 156
136% 100 MB/s
Min Avg Max
0.7 4K Read 0.9 1
1.89 4K Write 2.23 2.5
0.25 4K Mixed 0.74 1
104% 1.29 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest USB (mainstream) averages a speed of 100%
3.5TB free, PID 1066
Operating at USB 3.0 Speed
SusWrite @10s intervals: 152 155 152 152 153 156 MB/s
65.3% Good
Read 165
Write 156
Mixed 112
SusWrite 154
197% 147 MB/s
4K Read 1
4K Write 2.5
4K Mixed 1
123% 1.5 MB/s
3.5TB free, PID 1066
Operating at USB 3.0 Speed
SusWrite @10s intervals: 156 157 157 156 156 156 MB/s
63.3% Good
Read 151
Write 148
Mixed 66.1
SusWrite 156
174% 130 MB/s
4K Read 1
4K Write 2.3
4K Mixed 1
116% 1.43 MB/s
2TB free, PID 1066
Operating at USB 3.0 Speed
SusWrite @10s intervals: 115 114 115 115 115 114 MB/s
48.9% Average
Read 112
Write 112
Mixed 94.5
SusWrite 115
148% 109 MB/s
4K Read 1
4K Write 2.4
4K Mixed 0.9
116% 1.43 MB/s
153GB free, PID 1066
Operating at USB 3.0 Speed
SusWrite @10s intervals: 111 115 118 110 110 89 MB/s
48.9% Average
Read 130
Write 130
Mixed 92.7
SusWrite 109
155% 115 MB/s
4K Read 0.9
4K Write 2
4K Mixed 1
105% 1.3 MB/s
323GB free, PID 1066
Operating at USB 3.0 Speed
SusWrite @10s intervals: 100 98 98 98 99 101 MB/s
45.3% Average
Read 111
Write 109
Mixed 86.7
SusWrite 99
137% 102 MB/s
4K Read 1
4K Write 2.4
4K Mixed 1
119% 1.47 MB/s
2TB free, PID 1066
Operating at USB 3.0 Speed
SusWrite @10s intervals: 69 69 68 69 69 72 MB/s
40% Average
Read 124
Write 128
Mixed 100
SusWrite 69.4
140% 105 MB/s
4K Read 1
4K Write 2.2
4K Mixed 0.9
109% 1.37 MB/s
769GB free, PID 1066
Operating at USB 3.0 Speed
SusWrite @10s intervals: 68 68 68 68 68 69 MB/s
37% Below average
Read 102
Write 103
Mixed 71.5
SusWrite 68.2
114% 86.2 MB/s
4K Read 0.9
4K Write 2.3
4K Mixed 0.9
112% 1.37 MB/s
399GB free, PID 1066
Operating at USB 2.1 Speed
SusWrite @10s intervals: 26 28 27 28 28 28 MB/s
17.2% Very poor
Read 32
Write 27
Mixed 24.3
SusWrite 27.4
37% 27.7 MB/s
4K Read 0.7
4K Write 2.1
4K Mixed 0.9
105% 1.23 MB/s
13 MORE »
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