TEST
YOUR USB

Samsung (ExtHD)

SSD 840 PRO Seri 256GB

▲ 500 ▼

Release date ≈ Q2 2016.

Average Bench: 134% (3rd of 639)

Based on 7 user benchmarks.  Device: VID 174c PID 5106 Model: Samsung SSD 840 PRO Seri
Poor: 17%Average: 134% Great: 217%

Outstanding average bench

The Samsung SSD 840 PRO Seri 256GB averaged 34.5% higher than the peak scores attained by the group leaders. This is an excellent result which ranks the Samsung SSD 840 PRO Seri 256GB near the top of the comparison list.

Strengths

Avg. 4K-64Thread Write Speed 37.9MB/s
Avg. 4K Random Write Speed 22.8MB/s

Terrible consistency

The range of scores (95th - 5th percentile) for the Samsung SSD 840 PRO Seri 256GB is 200%. This is a particularly wide range which indicates that the Samsung SSD 840 PRO Seri 256GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sequential Read Speed 204MB/s
Avg. 4K Random Read Speed 16.9MB/s
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Average Bench

(Based on 7 samples)
Rank 3134%
Min Avg Max
58 Read 204 257
21.9 Write 142 248
24.9 Mixed 160 246
20.5 SusWrite 135 250
210% 160 MB/s
Min Avg Max
14.4 4K Read 16.9 20.5
0 4K Write 22.8 39.3
7.62 4K Mixed 13 26.6
1,280% 17.6 MB/s
Min Avg Max
15.6 DQ Read 19.4 22
29.8 DQ Write 37.9 44.4
8.82 DQ Mixed 14.6 28.8
1,859% 24 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest USB (mainstream) averages a speed of 100%
205GB free, PID 5106
Operating at USB 3.0 Speed
SusWrite @10s intervals: 249 250 250 250 250 250 MB/s
217% Outstanding
Read 257
Write 248
Mixed 233
SusWrite 250
336% 247 MB/s
4K Read 20.5
4K Write 39.3
4K Mixed 26.6
2,318% 28.8 MB/s
DQ Read 21.2
DQ Write 44.4
DQ Mixed 28.8
2,568% 31.5 MB/s
206GB free, PID 5106
Operating at USB 3.0 Speed
174% Outstanding
Read 253
Write 244
Mixed 246
318% 247 MB/s
4K Read 20.5
4K Write 26
4K Mixed 13.9
1,430% 20.1 MB/s
DQ Read 22
DQ Write 38
DQ Mixed 13.5
1,832% 24.5 MB/s
136GB free, PID 5106
Operating at USB 3.0 Speed
139% Outstanding
Read 244
Write 122
Mixed 162
206% 176 MB/s
4K Read 15.5
4K Write 24
4K Mixed 10.5
1,230% 16.7 MB/s
DQ Read 19.5
DQ Write 43.7
DQ Mixed 13.9
2,030% 25.7 MB/s
218GB free, PID 5106
Operating at USB 3.0 Speed
139% Outstanding
Read 236
Write 99.7
Mixed 143
182% 160 MB/s
4K Read 14.7
4K Write 25.8
4K Mixed 7.62
1,190% 16 MB/s
DQ Read 15.6
DQ Write 35.6
DQ Mixed 8.82
1,568% 20 MB/s
173GB free, PID 5106
Operating at USB 3.0 Speed
133% Outstanding
Read 248
Write 134
Mixed 184
225% 189 MB/s
4K Read 15.5
4K Write 20.9
4K Mixed 11.4
1,154% 15.9 MB/s
DQ Read 19.1
DQ Write 29.8
DQ Mixed 12
1,493% 20.3 MB/s
168GB free, PID 5106
Operating at USB 3.0 Speed
122% Outstanding
Read 131
Write 127
Mixed 129
166% 129 MB/s
4K Read 14.4
4K Write 23.4
4K Mixed 12.6
1,280% 16.8 MB/s
DQ Read 19
DQ Write 36.2
DQ Mixed 10.7
1,664% 21.9 MB/s
150GB free, PID 5106
Operating at USB 2.1 Speed
SusWrite @10s intervals: 20 21 20 21 21 20 MB/s
16.9% Very poor
Read 58
Write 21.9
Mixed 24.9
SusWrite 20.5
37% 31.3 MB/s
4K Read 17
4K Write 0
4K Mixed 8.6
356% 8.53 MB/s
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