TEST
YOUR USB

Samsung (ExtHD)

SSD 840 PRO Seri 512GB

▲ 500 ▼

Release date ≈ Q1 2017.

Average Bench: 134% (3rd of 639)

Based on 6 user benchmarks.  Device: VID 174c PID 55aa Model: Samsung SSD 840 PRO Seri
Poor: 99%Average: 134% Great: 173%

Outstanding average bench

The Samsung SSD 840 PRO Seri 512GB averaged 33.7% higher than the peak scores attained by the group leaders. This is an excellent result which ranks the Samsung SSD 840 PRO Seri 512GB near the top of the comparison list.

Strengths

Avg. 4K-64Thread Write Speed 34.8MB/s
Avg. 4K Random Write Speed 26.2MB/s

Very poor consistency

The range of scores (95th - 5th percentile) for the Samsung SSD 840 PRO Seri 512GB is 74.4%. This is a particularly wide range which indicates that the Samsung SSD 840 PRO Seri 512GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sequential Read Speed 182MB/s
Avg. Sequential Write Speed 85.1MB/s
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Average Bench

(Based on 6 samples)
Rank 3134%
Min Avg Max
126 Read 182 236
22.7 Write 85.1 160
40.7 Mixed 131 242
41.2 SusWrite 123 255
167% 130 MB/s
Min Avg Max
10 4K Read 15 19.4
20.8 4K Write 26.2 31.9
8.23 4K Mixed 18.1 24
1,562% 19.8 MB/s
Min Avg Max
12.3 DQ Read 17.3 22.2
17.9 DQ Write 34.8 45.1
7.92 DQ Mixed 22.2 27.3
2,002% 24.8 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest USB (mainstream) averages a speed of 100%
472GB free, PID 55aa
Operating at USB 3.0 Speed
SusWrite @10s intervals: 173 166 226 206 366 394 MB/s
173% Outstanding
Read 236
Write 160
Mixed 242
SusWrite 255
303% 223 MB/s
4K Read 19.1
4K Write 25.6
4K Mixed 22.3
1,700% 22.3 MB/s
DQ Read 22.2
DQ Write 38.8
DQ Mixed 25.9
2,283% 29 MB/s
407GB free, PID 55aa
Operating at USB 3.0 Speed
SusWrite @10s intervals: 103 127 128 128 128 128 MB/s
147% Outstanding
Read 126
Write 128
Mixed 128
SusWrite 124
173% 126 MB/s
4K Read 19.4
4K Write 31.7
4K Mixed 24
1,966% 25 MB/s
DQ Read 20.8
DQ Write 45.1
DQ Mixed 27.3
2,540% 31.1 MB/s
472GB free, PID 55aa
Operating at USB 3.0 Speed
SusWrite @10s intervals: 81 79 81 79 79 82 MB/s
146% Outstanding
Read 189
Write 29
Mixed 96
SusWrite 80.3
114% 98.6 MB/s
4K Read 12
4K Write 31.9
4K Mixed 17.9
1,738% 20.6 MB/s
DQ Read 12.5
DQ Write 36
DQ Mixed 23.3
2,063% 23.9 MB/s
471GB free, PID 55aa
Operating at USB 3.0 Speed
SusWrite @10s intervals: 110 114 115 116 115 116 MB/s
125% Outstanding
Read 128
Write 122
Mixed 122
SusWrite 114
166% 122 MB/s
4K Read 18.1
4K Write 25
4K Mixed 20.5
1,615% 21.2 MB/s
DQ Read 20.1
DQ Write 32.4
DQ Mixed 24.1
1,996% 25.5 MB/s
472GB free, PID 55aa
Operating at USB 3.0 Speed
SusWrite @10s intervals: 86 43 31 30 29 29 MB/s
113% Outstanding
Read 225
Write 49.3
Mixed 159
SusWrite 41.2
137% 119 MB/s
4K Read 10
4K Write 22.4
4K Mixed 15.4
1,323% 15.9 MB/s
DQ Read 15.7
DQ Write 38.4
DQ Mixed 24.8
2,208% 26.3 MB/s
51GB free, PID 55aa
Operating at USB 3.0 Speed
98.7% Outstanding
Read 187
Write 22.7
Mixed 40.7
75% 83.4 MB/s
4K Read 11.3
4K Write 20.8
4K Mixed 8.23
1,030% 13.4 MB/s
DQ Read 12.3
DQ Write 17.9
DQ Mixed 7.92
924% 12.7 MB/s
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